You searched for subject:(Organic Rankine cycle).
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1.
Barse, Kirtipal.
Design And Optimization Of Organic Rankine Cycle For Low Temperature Geothermal Power Plant.
Degree: PhD, Chemical Engineering, 2014, University of North Dakota
URL: https://commons.und.edu/theses/1503 
► Rising oil prices and environmental concerns have increased attention to renewable energy. Geothermal energy is a very attractive source of renewable energy. Although low…
(more)
▼ Rising oil prices and environmental concerns have increased attention to renewable energy. Geothermal energy is a very attractive source of renewable energy. Although low temperature resources (90C to 150C) are the most common and most abundant source of geothermal energy, they were not considered economical and technologically feasible for commercial power generation.
Organic Rankine Cycle (ORC) technology makes it feasible to use low temperature resources to generate power by using low boiling temperature
organic liquids. The first hypothesis for this research is that using ORC is technologically and economically feasible to generate electricity from low temperature geothermal resources. The second hypothesis for this research is redesigning the ORC system for the given resource condition will improve efficiency along with improving economics.
ORC model was developed using process simulator and validated with the data obtained from Chena Hot Springs, Alaska. A correlation was observed between the critical temperature of the working fluid and the efficiency for the
cycle. Exergy analysis of the
cycle revealed that the highest exergy destruction occurs in evaporator followed by condenser, turbine and working fluid pump for the base case scenarios.
Performance of ORC was studied using twelve working fluids in base, Internal Heat Exchanger and turbine bleeding constrained and non-constrained configurations. R601a, R245ca, R600 showed highest first and second law efficiency in the non-constrained IHX configuration. The highest net power was observed for R245ca, R601a and R601 working fluids in the non-constrained base configuration. Combined heat exchanger area and size parameter of the turbine showed an increasing trend as the critical temperature of the working fluid decreased. The lowest levelized cost of electricity was observed for R245ca followed by R601a, R236ea in non-constrained base configuration. The next best candidates in terms of LCOE were R601a, R245ca and R600 in non-constrained IHX configuration. LCOE is dependent on net power and higher net power favors to lower the cost of electricity.
Overall R245ca, R601, R601a, R600 and R236ea show better performance among the fluids studied. Non constrained configurations display better performance compared to the constrained configurations. Base non-constrained offered the highest net power and lowest LCOE.
Advisors/Committee Members: Michael D. Mann.
Subjects/Keywords: Geothermal Energy; Organic Rankine Cycle
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APA (6th Edition):
Barse, K. (2014). Design And Optimization Of Organic Rankine Cycle For Low Temperature Geothermal Power Plant. (Doctoral Dissertation). University of North Dakota. Retrieved from https://commons.und.edu/theses/1503
Chicago Manual of Style (16th Edition):
Barse, Kirtipal. “Design And Optimization Of Organic Rankine Cycle For Low Temperature Geothermal Power Plant.” 2014. Doctoral Dissertation, University of North Dakota. Accessed March 05, 2021.
https://commons.und.edu/theses/1503.
MLA Handbook (7th Edition):
Barse, Kirtipal. “Design And Optimization Of Organic Rankine Cycle For Low Temperature Geothermal Power Plant.” 2014. Web. 05 Mar 2021.
Vancouver:
Barse K. Design And Optimization Of Organic Rankine Cycle For Low Temperature Geothermal Power Plant. [Internet] [Doctoral dissertation]. University of North Dakota; 2014. [cited 2021 Mar 05].
Available from: https://commons.und.edu/theses/1503.
Council of Science Editors:
Barse K. Design And Optimization Of Organic Rankine Cycle For Low Temperature Geothermal Power Plant. [Doctoral Dissertation]. University of North Dakota; 2014. Available from: https://commons.und.edu/theses/1503
Delft University of Technology
2.
Stelwagen, Johan (author).
A study on the ORC for OTEC applications: Performance analysis for a changed configuration.
Degree: 2019, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:32058a2f-b7d0-4a78-bbe4-67ce8f92243d
► This thesis project aims to enable Bluerise to create a 3 [MW] plant for their OTEC system. The current model and lab setup used to…
(more)
▼ This thesis project aims to enable Bluerise to create a 3 [MW] plant for their OTEC system. The current model and lab setup used to create insight into the systems working mechanisms are based on a Kalina
cycle configuration. This method uses a working fluid mixture of water and ammonia. After evaporation, the liquid and vapor are separated and the heated liquid is used in a recuperator to retain (some of) the heat and increase the efficiency of the system. The first 3 [MW] test plant that is planned to be built will be using an ORC configuration. This method solely uses ammonia as a working fluid and doesn’t use a recuperator to retain heat. Understanding the effects of liquid separation and re-circulation are important aspects while using this configuration. The working method of the current OTEC off-design model and lab setup will have to be altered to accommodate the ORC configuration. An extensive study on both available literature, the current OTEC off-design model and OTEC Demo lab setup lead to conclude that a gear pump will be implemented to drive the liquid re-circulation from the separator back to the evaporator. Parallel to the gear pump, a one-way valve is installed into the
cycle so natural re-circulation experiments can also be conducted. From literature, a hypothesis is made on what the effect on the evaporator heat transfer rate could be by changing the re-circulation rate. The re-circulation rate must not be too high, because increased amounts of vapor bubbles increase fluid mixing and thus heat transfer. The re-circulation rate also must not be too low, because dry-out in the evaporator will occur, reducing the heat transfer rate. The OTEC off-design model that currently exists at Bluerise B.V. is used and expanded upon to accommodate the ORC configuration. The evaporator is changed in more detail, adding a heat transfer correlation and the possibility to calculate the evaporator pressure drop through two phase pressure drop correlations. After implementing the gear pump liquid re-circulation technique, the OTEC Demo can be used to create experimental data. From experiments, it is found that the re-circulation rate does not significantly change the evaporator heat transfer rate between 1.2 to 2.9 re-circulation rate. This is a remarkable result but can be explained by the low flow velocities in the evaporator, which indicate that the heat transfer process in the evaporator is mostly driven by pool boiling heat transfer mechanisms over flow boiling heat transfer mechanisms. Knowing that the re-circulation rate does not affect the evaporator heat transfer rate, liquid re-circulation can also happen naturally, by the liquid column driving force in the separator. Using this technique, a comparison with the Kalina
cycle configuration using pure ammonia is made. The evaporator performance is higher in the Kalina
cycle configuration, but the ORC configuration net power output is slightly higher. The main reason for this phenomenon is a lower required pumping power for the ORC configuration. The OTEC…
Advisors/Committee Members: Infante Ferreira, Carlos (mentor), Delft University of Technology (degree granting institution).
Subjects/Keywords: OTEC; organic rankine cycle; Kalina cycle; Performance
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APA (6th Edition):
Stelwagen, J. (. (2019). A study on the ORC for OTEC applications: Performance analysis for a changed configuration. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:32058a2f-b7d0-4a78-bbe4-67ce8f92243d
Chicago Manual of Style (16th Edition):
Stelwagen, Johan (author). “A study on the ORC for OTEC applications: Performance analysis for a changed configuration.” 2019. Masters Thesis, Delft University of Technology. Accessed March 05, 2021.
http://resolver.tudelft.nl/uuid:32058a2f-b7d0-4a78-bbe4-67ce8f92243d.
MLA Handbook (7th Edition):
Stelwagen, Johan (author). “A study on the ORC for OTEC applications: Performance analysis for a changed configuration.” 2019. Web. 05 Mar 2021.
Vancouver:
Stelwagen J(. A study on the ORC for OTEC applications: Performance analysis for a changed configuration. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Mar 05].
Available from: http://resolver.tudelft.nl/uuid:32058a2f-b7d0-4a78-bbe4-67ce8f92243d.
Council of Science Editors:
Stelwagen J(. A study on the ORC for OTEC applications: Performance analysis for a changed configuration. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:32058a2f-b7d0-4a78-bbe4-67ce8f92243d
Delft University of Technology
3.
Osakwe, Precious (author).
Advanced Condition Monitoring for Organic Rankine Cycle Systems.
Degree: 2018, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:dd8bab58-2250-485d-9c95-ffc2a6600e09
► Transitioning to cleaner sources of energy and improving the efficiency of power generators are crucial in combating global warming. Organic Rankine Cycles (ORC) when coupled…
(more)
▼ Transitioning to cleaner sources of energy and improving the efficiency of power generators are crucial in combating global warming.
Organic Rankine Cycles (ORC) when coupled to heat emitting power generators allows for waste heat recovery; thus increasing the engine overall efficiency and reducing atmospheric pollution. Additionally, implementing engine life
cycle management is another way to improve the overall efficiency of power systems. The condition monitoring tool that has been developed in this research comprises a true model and a surrogate model. The true and surrogate models describe the real and ideal state of the ORC respectively and a comparison of both models reveals the health status of the ORC. The research has succeeded in creating a tool that is capable of performing accurate diagnostics in the shortest possible time and also in the development of a simple but unique method to derive thermodynamic relations for two phase fluids.
Advisors/Committee Members: Visser, Wilfried (mentor), Eppinga, Quirijn (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: Organic Rankine Cycle; Condition Monitoring; Modelling
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APA (6th Edition):
Osakwe, P. (. (2018). Advanced Condition Monitoring for Organic Rankine Cycle Systems. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:dd8bab58-2250-485d-9c95-ffc2a6600e09
Chicago Manual of Style (16th Edition):
Osakwe, Precious (author). “Advanced Condition Monitoring for Organic Rankine Cycle Systems.” 2018. Masters Thesis, Delft University of Technology. Accessed March 05, 2021.
http://resolver.tudelft.nl/uuid:dd8bab58-2250-485d-9c95-ffc2a6600e09.
MLA Handbook (7th Edition):
Osakwe, Precious (author). “Advanced Condition Monitoring for Organic Rankine Cycle Systems.” 2018. Web. 05 Mar 2021.
Vancouver:
Osakwe P(. Advanced Condition Monitoring for Organic Rankine Cycle Systems. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Mar 05].
Available from: http://resolver.tudelft.nl/uuid:dd8bab58-2250-485d-9c95-ffc2a6600e09.
Council of Science Editors:
Osakwe P(. Advanced Condition Monitoring for Organic Rankine Cycle Systems. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:dd8bab58-2250-485d-9c95-ffc2a6600e09
Mississippi State University
4.
Spayde, Emily Diane.
Economic, environmental, and energetic performance analysis of a solar powered organic Rankine cycle (ORC).
Degree: PhD, Mechanical Engineering, 2017, Mississippi State University
URL: http://sun.library.msstate.edu/ETD-db/theses/available/etd-10252017-120807/
;
► In this dissertation, different configurations of solar powered organic Rankine cycles (ORC) are investigated. The configurations include: a basic ORC, a regenerative ORC (R-ORC),…
(more)
▼ In this dissertation, different configurations of solar powered
organic Rankine cycles (ORC) are investigated. The configurations include: a basic ORC, a regenerative ORC (R-ORC), and a basic ORC with electric energy storage (EES) (ORC-EES). The basic ORC and the R-ORC are evaluated using different dry
organic fluids based on the first and second laws of thermodynamics and electricity production. The performance of both ORC systems is based on the potential for primary energy consumption (PEC) and carbon dioxide emission (CDE) savings, the electricity production, and the available capital cost (ACC) for the system. The R-ORC and basic ORC are both evaluated in Jackson, MS and Tucson, AZ to determine the effect of hourly solar irradiation and ambient temperature on both systems. For the basic ORC a parametric analysis is performed to determine the effects of
cycle pressure, temperature, solar collector area, and turbine efficiency on the system performance. Similarly, for the R-ORC, a parametric analysis investigating the effect of open feed
organic fluid heater intermediate pressure and turbine efficiency on the R-ORC is performed. Finally an ORC connected to an EES device located in Tucson, AZ is studied. The ORC-EES supplies electricity to three different commercial buildings. The ORC-EES is modeled to be charging when irradiation is available and discharging when there is not enough irradiation to generate electricity from the ORC. The performance of the system is based on the amount of electricity supplied, the potential for PEC, CDE, and cost savings, and the ACC. The effect of solar collector area on the percentage of supplied electricity, EES device size, and cost savings is also studied. It was determined that all the evaluated ORC configurations have the potential to produce PEC, CDE, and cost savings, but their performance is affected by the
organic working fluid, solar collector area, and the location where the system is installed.
Advisors/Committee Members: Alta Knizley (committee member), Heejin Cho (committee member), Pedro J. Mago (chair), Rogelio Luck (committee member).
Subjects/Keywords: carbon dioxide emissions; primary energy consumption; solar ORC; organic Rankine cycle
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APA (6th Edition):
Spayde, E. D. (2017). Economic, environmental, and energetic performance analysis of a solar powered organic Rankine cycle (ORC). (Doctoral Dissertation). Mississippi State University. Retrieved from http://sun.library.msstate.edu/ETD-db/theses/available/etd-10252017-120807/ ;
Chicago Manual of Style (16th Edition):
Spayde, Emily Diane. “Economic, environmental, and energetic performance analysis of a solar powered organic Rankine cycle (ORC).” 2017. Doctoral Dissertation, Mississippi State University. Accessed March 05, 2021.
http://sun.library.msstate.edu/ETD-db/theses/available/etd-10252017-120807/ ;.
MLA Handbook (7th Edition):
Spayde, Emily Diane. “Economic, environmental, and energetic performance analysis of a solar powered organic Rankine cycle (ORC).” 2017. Web. 05 Mar 2021.
Vancouver:
Spayde ED. Economic, environmental, and energetic performance analysis of a solar powered organic Rankine cycle (ORC). [Internet] [Doctoral dissertation]. Mississippi State University; 2017. [cited 2021 Mar 05].
Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-10252017-120807/ ;.
Council of Science Editors:
Spayde ED. Economic, environmental, and energetic performance analysis of a solar powered organic Rankine cycle (ORC). [Doctoral Dissertation]. Mississippi State University; 2017. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-10252017-120807/ ;
Florida International University
5.
Rayegan, Rambod.
Exergoeconomic Analysis of Solar Organic Rankine Cycle for Geothermal Air Conditioned Net Zero Energy Buildings.
Degree: Mechanical Engineering, 2011, Florida International University
URL: https://digitalcommons.fiu.edu/etd/470
;
10.25148/etd.FI11080805
;
FI11080805
► This study is an attempt at achieving Net Zero Energy Building (NZEB) using a solar Organic Rankine Cycle (ORC) based on exergetic and economic…
(more)
▼ This study is an attempt at achieving Net Zero Energy Building (NZEB) using a solar
Organic Rankine Cycle (ORC) based on exergetic and economic measures. The working fluid, working conditions of the
cycle,
cycle configuration, and solar collector type are considered the optimization parameters for the solar ORC system.
In the first section, a procedure is developed to compare ORC working fluids based on their molecular components, temperature-entropy diagram and fluid effects on the thermal efficiency, net power generated, vapor expansion ratio, and exergy efficiency of the
Rankine cycle. Fluids with the best
cycle performance are recognized in two different temperature levels within two different categories of fluids: refrigerants and non-refrigerants. Important factors that could lead to irreversibility reduction of the solar ORC are also investigated in this study.
In the next section, the system requirements needed to maintain the electricity demand of a geothermal air-conditioned commercial building located in Pensacola of Florida is considered as the criteria to select the optimal components and optimal working condition of the system. The solar collector loop, building, and geothermal air conditioning system are modeled using TRNSYS. Available electricity bills of the building and the 3-week monitoring data on the performance of the geothermal system are employed to calibrate the simulation. The simulation is repeated for Miami and Houston in order to evaluate the effect of the different solar radiations on the system requirements.
The final section discusses the exergoeconomic analysis of the ORC system with the optimum performance. Exergoeconomics rests on the philosophy that exergy is the only rational basis for assigning monetary costs to a system’s interactions with its surroundings and to the sources of thermodynamic inefficiencies within it. Exergoeconomic analysis of the optimal ORC system shows that the ratio R
ex of the annual exergy loss to the capital cost can be considered a key parameter in optimizing a solar ORC system from the thermodynamic and economic point of view. It also shows that there is a systematic correlation between the exergy loss and capital cost for the investigated solar ORC system.
Advisors/Committee Members: Yong X. Tao, Ali Ebadian, Yiding Cao, Yimin Zhu.
Subjects/Keywords: Exergoeconomic; Organic Rankine Cycle; Geothermal; Hot and Humid; TRNSYS
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APA (6th Edition):
Rayegan, R. (2011). Exergoeconomic Analysis of Solar Organic Rankine Cycle for Geothermal Air Conditioned Net Zero Energy Buildings. (Thesis). Florida International University. Retrieved from https://digitalcommons.fiu.edu/etd/470 ; 10.25148/etd.FI11080805 ; FI11080805
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Rayegan, Rambod. “Exergoeconomic Analysis of Solar Organic Rankine Cycle for Geothermal Air Conditioned Net Zero Energy Buildings.” 2011. Thesis, Florida International University. Accessed March 05, 2021.
https://digitalcommons.fiu.edu/etd/470 ; 10.25148/etd.FI11080805 ; FI11080805.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Rayegan, Rambod. “Exergoeconomic Analysis of Solar Organic Rankine Cycle for Geothermal Air Conditioned Net Zero Energy Buildings.” 2011. Web. 05 Mar 2021.
Vancouver:
Rayegan R. Exergoeconomic Analysis of Solar Organic Rankine Cycle for Geothermal Air Conditioned Net Zero Energy Buildings. [Internet] [Thesis]. Florida International University; 2011. [cited 2021 Mar 05].
Available from: https://digitalcommons.fiu.edu/etd/470 ; 10.25148/etd.FI11080805 ; FI11080805.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Rayegan R. Exergoeconomic Analysis of Solar Organic Rankine Cycle for Geothermal Air Conditioned Net Zero Energy Buildings. [Thesis]. Florida International University; 2011. Available from: https://digitalcommons.fiu.edu/etd/470 ; 10.25148/etd.FI11080805 ; FI11080805
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Delft University of Technology
6.
Scalcerle, Lucrezia (author).
Development of a design methodology for transonic rotor blades with ORC application.
Degree: 2017, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:ec2f0c90-af7f-4086-93a8-f2b0499e468a
► Organic Rankine Cycles (ORCs) are one of the technologies that can play an important role in the reduction of green house emissions. By converting low…
(more)
▼ Organic Rankine Cycles (ORCs) are one of the technologies that can play an important role in the reduction of green house emissions. By converting low temperature energy sources in electricity, they are suitable for the exploitation of renewable sources (as solar and geothermal) and industrial waste heat. One of the most critical components in ORCs is the gas turbine, which usually has a radial inflow and one single expansion stage. The difficulties of the turbine design are related to real gas effects of the working fluids (
organic compounds) and high expansion ratios, which lead to a supersonic flow at the turbine exit. The objective of this work is to develop a blade design methodology for a transonic turbine rotor. This is done by setting the focus on the blade passage and shaping it as a rotating nozzle. First, theory of rotating nozzles is developed, assuming the flow to be one dimensional and isentropic. Relations with respect to chocked conditions and the analytic solution to the flowfield are derived. Afterwards, the blade designmethodology is developed based on the rotating nozzle theory. Inputs of the methodology are total conditions, mass flowand static pressure at the rotor inlet, static pressure at the rotor outlet. Both the theory developed and the blade design methodology are validated. The relations derived for a one dimensional flow through an isentropic nozzle are valid for an ideal gas, while validation for real gas is not carried out. The location of the physical throat and its cross sectional area are determined and the analytic solution method of the flow field is proved to be precise. The blade design methodology is based on a one dimensional approximation and represents a first step towards a more precise blade design: the flow conditions along the nozzle mid line follow the expected trend. However, the boundary conditions are not respected and the flow varies considerably far from the mid line. Additional levels of complexity (as 2D approximation) have to be implemented in future work.
Advisors/Committee Members: Pecnik, Rene (mentor), Otero Rodriguez, Gustavo (mentor), Delft University of Technology (degree granting institution).
Subjects/Keywords: organic rankine cycle; rotating nozzle; inertial frame; centripetal flow; radial flow
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APA (6th Edition):
Scalcerle, L. (. (2017). Development of a design methodology for transonic rotor blades with ORC application. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:ec2f0c90-af7f-4086-93a8-f2b0499e468a
Chicago Manual of Style (16th Edition):
Scalcerle, Lucrezia (author). “Development of a design methodology for transonic rotor blades with ORC application.” 2017. Masters Thesis, Delft University of Technology. Accessed March 05, 2021.
http://resolver.tudelft.nl/uuid:ec2f0c90-af7f-4086-93a8-f2b0499e468a.
MLA Handbook (7th Edition):
Scalcerle, Lucrezia (author). “Development of a design methodology for transonic rotor blades with ORC application.” 2017. Web. 05 Mar 2021.
Vancouver:
Scalcerle L(. Development of a design methodology for transonic rotor blades with ORC application. [Internet] [Masters thesis]. Delft University of Technology; 2017. [cited 2021 Mar 05].
Available from: http://resolver.tudelft.nl/uuid:ec2f0c90-af7f-4086-93a8-f2b0499e468a.
Council of Science Editors:
Scalcerle L(. Development of a design methodology for transonic rotor blades with ORC application. [Masters Thesis]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:ec2f0c90-af7f-4086-93a8-f2b0499e468a
Delft University of Technology
7.
Thimmanoor, Sai (author).
Organic Rankine cycle as waste heat recovery system for marine application: Screening methodology, modelling and analysis.
Degree: 2018, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:e6c46512-5a2d-4563-9304-1482a0439684
► Carbon dioxide emission into the earth’s atmosphere by maritime activities are a concern for the people within and outside the industry. This is because of…
(more)
▼ Carbon dioxide emission into the earth’s atmosphere by maritime activities are a concern for the people within and outside the industry. This is because of the environmental impacts that are caused by these greenhouse gas emissions which changes the very chemistry of this planet. These impacts can be mitigated by reducing the CO2 emissions which can be achieved by several design and/or operational means. Waste heat recovery (WHR) technology is one such means that is capable of reducing emissions. This is achieved by improving the overall fuel efficiency of marine engines which reduces the fuel consumption of the vessel. This improvement is realised by harnessing the heat energy that is expelled by the engine through waste heat sources such as exhaust gas, etc.
Organic Rankine cycle (ORC) is one of many WHR technologies that is capable of harnessing that waste heat energy from the fuel which cannot be utilised by the engine operation alone. ORC as a WHR system (WHRS) is widely implemented in land based applications due to its fluid choice flexibility, plant simplicity and net efficiency. However, it is rather new to the maritime industry because WHRS on-board ships are predominantly based on steam
Rankine cycle or turbo-compounding. These systems have their own advantages but ORC-WHRS may outweigh them in certain applications on-board ships. This is especially for electrical power generation from low and medium temperature waste heat sources. However, ORC in marine application encounters challenges unlike seen in land based applications. These challenges are caused by the physical & geometrical constraints, operational profile of the vessel or uncertainties caused at sea. In this thesis, the implementation of ORC-WHRS to marine engines for exhaust gas is investigated and studied to understand how such an application can be beneficial. Unlike steam
Rankine cycle, an ORC system has flexibility in choosing an
organic fluid that is suitable based on the application. This flexibility in fluid choices are confronted by the above mentioned maritime related challenges. Hence, a screening methodology is devised in this thesis that finds a suitable fluid based on the waste heat source profile and selection parameters. These selection parameters are necessary to filter out functioning
organic fluids that can be limited due to the mentioned challenges. In this thesis, the power density of the ORC plant is the selection parameter used.As mentioned earlier, the ORC-WHRS may often be subjected to off-design conditions due to the operational profile of the vessel or by uncertainties at sea. Hence, off-design performance is analysed to study the ORC system when designed at several discrete engine load points. These analysis are carried out in plant models modified from an existing steam based dynamic model and developed into a simple-ORC and a recuperative-ORC dynamic plant models. Sensitivity analysis of these models are also performed to understand uncertainties in the model output corresponding to uncertainties in…
Advisors/Committee Members: Visser, Klaas (mentor), Georgescu, Ioana (mentor), Mestemaker, BTW (mentor), Infante Ferreira, Carlos (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: organic rankine cycle; Waste heat recovery; Marine Technology
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APA (6th Edition):
Thimmanoor, S. (. (2018). Organic Rankine cycle as waste heat recovery system for marine application: Screening methodology, modelling and analysis. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:e6c46512-5a2d-4563-9304-1482a0439684
Chicago Manual of Style (16th Edition):
Thimmanoor, Sai (author). “Organic Rankine cycle as waste heat recovery system for marine application: Screening methodology, modelling and analysis.” 2018. Masters Thesis, Delft University of Technology. Accessed March 05, 2021.
http://resolver.tudelft.nl/uuid:e6c46512-5a2d-4563-9304-1482a0439684.
MLA Handbook (7th Edition):
Thimmanoor, Sai (author). “Organic Rankine cycle as waste heat recovery system for marine application: Screening methodology, modelling and analysis.” 2018. Web. 05 Mar 2021.
Vancouver:
Thimmanoor S(. Organic Rankine cycle as waste heat recovery system for marine application: Screening methodology, modelling and analysis. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Mar 05].
Available from: http://resolver.tudelft.nl/uuid:e6c46512-5a2d-4563-9304-1482a0439684.
Council of Science Editors:
Thimmanoor S(. Organic Rankine cycle as waste heat recovery system for marine application: Screening methodology, modelling and analysis. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:e6c46512-5a2d-4563-9304-1482a0439684
Colorado State University
8.
Cirincione, Nicholas.
Design, construction and commissioning of an organic Rankine cycle waste heat recovery system with a Tesla-hybrid turbine expander.
Degree: MS(M.S.), Mechanical Engineering, 2011, Colorado State University
URL: http://hdl.handle.net/10217/70681
► Issues surrounding energy are some of the most compelling subjects in the world today. With human's ever increasing need for energy, production must increase or…
(more)
▼ Issues surrounding energy are some of the most compelling subjects in the world today. With human's ever increasing need for energy, production must increase or consumption must be reduced to avoid an unsustainable long-term energy balance. One part of the energy solution is low-temperature
Organic Rankine Cycles (ORCs). ORCs can be utilized to produce power in mass quantity from a dedicated heat source such as a geothermal well. ORCs may also be utilized as a waste heat recovery system to generate power from a heat stream that is typically rejected to the environment. Low-temperature waste heat streams are ubiquitous as every internal combustion engine generates 55-75% of its total fuel energy as waste heat. Efficiency of a waste heat recovery ORC system is strongly dependent on condensing temperature and expander efficiency. Condensing temperatures are typically kept low with an evaporative condensing unit. However, water consumption to increase energy production is becoming less tolerated. To provide a means to conduct research around these issues, a waste heat recovery ORC test bed was designed and constructed. This thesis contains information on construction and operation of the test bed with these features: R245fa working fluid, direct dry cooled condensing and a Tesla-hybrid turbine expander.
Advisors/Committee Members: Olsen, Daniel (advisor), Zimmerle, Daniel (committee member), Dandy, David (committee member).
Subjects/Keywords: ORC; waste heat recovery; Tesla; organic Rankine cycle
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APA (6th Edition):
Cirincione, N. (2011). Design, construction and commissioning of an organic Rankine cycle waste heat recovery system with a Tesla-hybrid turbine expander. (Masters Thesis). Colorado State University. Retrieved from http://hdl.handle.net/10217/70681
Chicago Manual of Style (16th Edition):
Cirincione, Nicholas. “Design, construction and commissioning of an organic Rankine cycle waste heat recovery system with a Tesla-hybrid turbine expander.” 2011. Masters Thesis, Colorado State University. Accessed March 05, 2021.
http://hdl.handle.net/10217/70681.
MLA Handbook (7th Edition):
Cirincione, Nicholas. “Design, construction and commissioning of an organic Rankine cycle waste heat recovery system with a Tesla-hybrid turbine expander.” 2011. Web. 05 Mar 2021.
Vancouver:
Cirincione N. Design, construction and commissioning of an organic Rankine cycle waste heat recovery system with a Tesla-hybrid turbine expander. [Internet] [Masters thesis]. Colorado State University; 2011. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10217/70681.
Council of Science Editors:
Cirincione N. Design, construction and commissioning of an organic Rankine cycle waste heat recovery system with a Tesla-hybrid turbine expander. [Masters Thesis]. Colorado State University; 2011. Available from: http://hdl.handle.net/10217/70681
University of Kansas
9.
Sprouse, Charles Edward, III.
Combined Diesel Particulate Filter/Heat Exchanger for Engine Exhaust Waste Heat Recovery with Organic Rankine Cycle.
Degree: PhD, Mechanical Engineering, 2016, University of Kansas
URL: http://hdl.handle.net/1808/21558
► Diesel Particulate Filters (DPFs) are currently being used to remove Particulate Matter (PM) from compression ignition engine exhaust streams with collection efficiencies approaching 100%. These…
(more)
▼ Diesel Particulate Filters (DPFs) are currently being used to remove Particulate Matter (PM) from compression ignition engine exhaust streams with collection efficiencies approaching 100%. These devices capture soot by forcing the exhaust gases through porous walls, where entrapment of the particulates initially occurs. Eventually, a cake layer begins forming on the inlet channel walls, causing an increased pressure drop through the device and necessitating a soot combustion event to unload the filter. The exothermic nature of these regeneration events serve to enhance the thermal energy content of the exhaust, which already contains approximately one-third of the fuel energy being consumed by the engine. Typically, the energy from both sources is expelled to the atmosphere, destroying the ability to produce useful work from the exhaust heat. However, a novel device described here as a Diesel Particulate Filter/Heat Exchanger (DPFHX) may be coupled to an
Organic Rankine Cycle (ORC) to simultaneously provide particulate matter filtration and waste heat recovery. The DPFHX concept is based on the shell-and-tube heat exchanger geometry and features enlarged tubes to contain DPF cores, allowing energy capture from the engine exhaust while preserving the standard technique of PM abatement. Since the working fluid circulating on the shell side collects heat from the exhaust, the DPFHX serves as the
organic Rankine cycle’s evaporator. Along with the cycle’s pump, expander, and condenser, the DPFHX forms an ORC capable of transforming exhaust waste heat into supplementary power for the engine. Reducing exergy destruction in this manner meets the two main objectives of engine research; the reduction of fuel consumption and emissions. The degree to which the proposed DPFHX-ORC system achieves these goals is a focus of this dissertation, where the advancement of this technology occurs primarily through theoretical efforts. As precursors to the eventual DPFHX-ORC computer model, individual ORC and DPF models are created. With respect to simulating an ORC, a historical study of the ORC WHR literature informs the design choices associated with building an ORC model. Authors in this research area note that the two dominant factors influencing
cycle performance are the working fluid and expander selections. Based on these findings, eight dry fluids (butane, pentane, hexane, cyclopentane, benzene, toluene, R245fa, and R123) compatible with reciprocating expanders are identified for use in an ORC model. By simulating WHR from a Yanmar L100V diesel engine, the component-based ORC constructed illustrates an approximate 10% improvement to the engine’s efficiency across all operating conditions and favors the use of pentane or cyclopentane as the cycle’s working fluid. These results are consistent with reported ORC outputs in the literature and demonstrate the ORC model’s value as a component of the DPFHX-ORC model. The second foundational component is a DPF model, which is developed using the DPF governing equations in area-conserved…
Advisors/Committee Members: Depcik, Christopher D. (advisor), TenPas, Peter (cmtemember), Bergman, Theodore (cmtemember), Yang, Xinmai (cmtemember), Peltier, Edward (cmtemember).
Subjects/Keywords: Mechanical engineering; Diesel Particulate Filter; Organic Rankine Cycle; Waste Heat Recovery
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APA ·
Chicago ·
MLA ·
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Export
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APA (6th Edition):
Sprouse, Charles Edward, I. (2016). Combined Diesel Particulate Filter/Heat Exchanger for Engine Exhaust Waste Heat Recovery with Organic Rankine Cycle. (Doctoral Dissertation). University of Kansas. Retrieved from http://hdl.handle.net/1808/21558
Chicago Manual of Style (16th Edition):
Sprouse, Charles Edward, III. “Combined Diesel Particulate Filter/Heat Exchanger for Engine Exhaust Waste Heat Recovery with Organic Rankine Cycle.” 2016. Doctoral Dissertation, University of Kansas. Accessed March 05, 2021.
http://hdl.handle.net/1808/21558.
MLA Handbook (7th Edition):
Sprouse, Charles Edward, III. “Combined Diesel Particulate Filter/Heat Exchanger for Engine Exhaust Waste Heat Recovery with Organic Rankine Cycle.” 2016. Web. 05 Mar 2021.
Vancouver:
Sprouse, Charles Edward I. Combined Diesel Particulate Filter/Heat Exchanger for Engine Exhaust Waste Heat Recovery with Organic Rankine Cycle. [Internet] [Doctoral dissertation]. University of Kansas; 2016. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1808/21558.
Council of Science Editors:
Sprouse, Charles Edward I. Combined Diesel Particulate Filter/Heat Exchanger for Engine Exhaust Waste Heat Recovery with Organic Rankine Cycle. [Doctoral Dissertation]. University of Kansas; 2016. Available from: http://hdl.handle.net/1808/21558
University of Kansas
10.
Sprouse, Charles Edward, III.
Combined Diesel Particulate Filter/Heat Exchanger for Engine Exhaust Waste Heat Recovery with Organic Rankine Cycle.
Degree: PhD, Mechanical Engineering, 2016, University of Kansas
URL: http://hdl.handle.net/1808/25771
► Diesel Particulate Filters (DPFs) are currently being used to remove Particulate Matter (PM) from compression ignition engine exhaust streams with collection efficiencies approaching 100%. These…
(more)
▼ Diesel Particulate Filters (DPFs) are currently being used to remove Particulate Matter (PM) from compression ignition engine exhaust streams with collection efficiencies approaching 100%. These devices capture soot by forcing the exhaust gases through porous walls, where entrapment of the particulates initially occurs. Eventually, a cake layer begins forming on the inlet channel walls, causing an increased pressure drop through the device and necessitating a soot combustion event to unload the filter. The exothermic nature of these regeneration events serve to enhance the thermal energy content of the exhaust, which already contains approximately one-third of the fuel energy being consumed by the engine. Typically, the energy from both sources is expelled to the atmosphere, destroying the ability to produce useful work from the exhaust heat. However, a novel device described here as a Diesel Particulate Filter/Heat Exchanger (DPFHX) may be coupled to an
Organic Rankine Cycle (ORC) to simultaneously provide particulate matter filtration and waste heat recovery. The DPFHX concept is based on the shell-and-tube heat exchanger geometry and features enlarged tubes to contain DPF cores, allowing energy capture from the engine exhaust while preserving the standard technique of PM abatement. Since the working fluid circulating on the shell side collects heat from the exhaust, the DPFHX serves as the
organic Rankine cycle’s evaporator. Along with the cycle’s pump, expander, and condenser, the DPFHX forms an ORC capable of transforming exhaust waste heat into supplementary power for the engine. Reducing exergy destruction in this manner meets the two main objectives of engine research; the reduction of fuel consumption and emissions. The degree to which the proposed DPFHX-ORC system achieves these goals is a focus of this dissertation, where the advancement of this technology occurs primarily through theoretical efforts. As precursors to the eventual DPFHX-ORC computer model, individual ORC and DPF models are created. With respect to simulating an ORC, a historical study of the ORC WHR literature informs the design choices associated with building an ORC model. Authors in this research area note that the two dominant factors influencing
cycle performance are the working fluid and expander selections. Based on these findings, eight dry fluids (butane, pentane, hexane, cyclopentane, benzene, toluene, R245fa, and R123) compatible with reciprocating expanders are identified for use in an ORC model. By simulating WHR from a Yanmar L100V diesel engine, the component-based ORC constructed illustrates an approximate 10% improvement to the engine’s efficiency across all operating conditions and favors the use of pentane or cyclopentane as the cycle’s working fluid. These results are consistent with reported ORC outputs in the literature and demonstrate the ORC model’s value as a component of the DPFHX-ORC model. The second foundational component is a DPF model, which is developed using the DPF governing equations in area-conserved…
Advisors/Committee Members: Depcik, Christopher D. (advisor), TenPas, Peter (cmtemember), Bergman, Theodore (cmtemember), Yang, Xinmai (cmtemember), Peltier, Edward (cmtemember).
Subjects/Keywords: Mechanical engineering; Diesel Particulate Filter; Organic Rankine Cycle; Waste Heat Recovery
Record Details
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sprouse, Charles Edward, I. (2016). Combined Diesel Particulate Filter/Heat Exchanger for Engine Exhaust Waste Heat Recovery with Organic Rankine Cycle. (Doctoral Dissertation). University of Kansas. Retrieved from http://hdl.handle.net/1808/25771
Chicago Manual of Style (16th Edition):
Sprouse, Charles Edward, III. “Combined Diesel Particulate Filter/Heat Exchanger for Engine Exhaust Waste Heat Recovery with Organic Rankine Cycle.” 2016. Doctoral Dissertation, University of Kansas. Accessed March 05, 2021.
http://hdl.handle.net/1808/25771.
MLA Handbook (7th Edition):
Sprouse, Charles Edward, III. “Combined Diesel Particulate Filter/Heat Exchanger for Engine Exhaust Waste Heat Recovery with Organic Rankine Cycle.” 2016. Web. 05 Mar 2021.
Vancouver:
Sprouse, Charles Edward I. Combined Diesel Particulate Filter/Heat Exchanger for Engine Exhaust Waste Heat Recovery with Organic Rankine Cycle. [Internet] [Doctoral dissertation]. University of Kansas; 2016. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1808/25771.
Council of Science Editors:
Sprouse, Charles Edward I. Combined Diesel Particulate Filter/Heat Exchanger for Engine Exhaust Waste Heat Recovery with Organic Rankine Cycle. [Doctoral Dissertation]. University of Kansas; 2016. Available from: http://hdl.handle.net/1808/25771
University of Texas – Austin
11.
Duong, Tai Anh.
Heat waste recovery system from exhaust gas of diesel engine to a reciprocal steam engine.
Degree: MSin Engineering, Mechanical Engineering, 2011, University of Texas – Austin
URL: http://hdl.handle.net/2152/ETD-UT-2011-08-4273
► This research project was about the combined organic Rankine cycle which extracted energy from the exhaust gas of a diesel engine. There was a study…
(more)
▼ This research project was about the combined
organic Rankine cycle which extracted energy from the exhaust gas of a diesel engine. There was a study about significant properties of suitable working fluids. The chosen working fluid, R134a, was used to operate at the dry condition when it exited the steam piston engine. Furthermore, R134a is environmentally friendly with low environmental impact. It was also compatible with sealing materials. There were calibrations for the components of the combined
Rankine cycle. The efficiency of the heat exchanger converting exhaust heat from the diesel engine to vaporize R134a was 89%. The average efficiency of the generator was 50%. The hydraulic pump used for the combined
Rankine cycle showed a transporting problem, as vapor-lock occurred when the pump ran for about 1 minute. The output of the combined
Rankine cycle was normalized to compensate for the parasitic losses of a virtual vane pump used in hydraulic systems for the 6 liter diesel engines. There were three different vane pump widths from different pumps to compare frictional loss. The pump with the smallest vane width presented the least frictional mean effective pressure (fmep) (0.26 kPa) when scaled with the displacement of the GMC Sierra 6 liter diesel engine. The power output of the
Rankine cycle was scaled to brake mean effective pressure (bmep) to compare with the frictional mean effective pressure. The maximum bmep was at 0.071 kPa when diesel engine had rotational speed at 2190 RPM. The power outputs of the
organic Rankine compensated partially the frictional loss of the vane pumps in the 6 liter diesel engine. By using R134a, the condensing pressure was 0.8 MPa; hence, the power outputs from steam engine were limited. Therefore, refrigerants with lower condensing pressure were needed. There were proposal for improvement of the
organic Rankine by substituting R134a by R123 (0.1 MPa), R21 (0.2 MPa), and R114 (0.25 MPa) .
Advisors/Committee Members: Matthews, Ronald D. (advisor), Hall, Matthew J. (committee member).
Subjects/Keywords: Organic Rankine cycle; Diesel engine; Waste heat recovery; Reciprocal steam engine
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APA ·
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Export
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Manager
APA (6th Edition):
Duong, T. A. (2011). Heat waste recovery system from exhaust gas of diesel engine to a reciprocal steam engine. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/ETD-UT-2011-08-4273
Chicago Manual of Style (16th Edition):
Duong, Tai Anh. “Heat waste recovery system from exhaust gas of diesel engine to a reciprocal steam engine.” 2011. Masters Thesis, University of Texas – Austin. Accessed March 05, 2021.
http://hdl.handle.net/2152/ETD-UT-2011-08-4273.
MLA Handbook (7th Edition):
Duong, Tai Anh. “Heat waste recovery system from exhaust gas of diesel engine to a reciprocal steam engine.” 2011. Web. 05 Mar 2021.
Vancouver:
Duong TA. Heat waste recovery system from exhaust gas of diesel engine to a reciprocal steam engine. [Internet] [Masters thesis]. University of Texas – Austin; 2011. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/2152/ETD-UT-2011-08-4273.
Council of Science Editors:
Duong TA. Heat waste recovery system from exhaust gas of diesel engine to a reciprocal steam engine. [Masters Thesis]. University of Texas – Austin; 2011. Available from: http://hdl.handle.net/2152/ETD-UT-2011-08-4273
Delft University of Technology
12.
Arumugam, Senthil Kumar (author).
Thermoeconomic Optimization of Organic Rankine Cycle (ORC) for Low Grade Heat Recovery at Temperatures below 100℃.
Degree: 2017, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:044eec5f-c3f9-4021-a7d8-1f3303d3492f
► Low-grade heat sources are abundant on earth but are majorly untapped due to lower thermodynamic efficiency at low temperatures and cost considerations. A cost-effective technology…
(more)
▼ Low-grade heat sources are abundant on earth but are majorly untapped due to lower thermodynamic efficiency at low temperatures and cost considerations. A cost-effective technology is needed to convert this energy resource into useful forms of energy. This work aims at optimizing
Organic Rankine Cycle (ORC) based heat engine and a cogeneration system developed to produce electricity and refrigeration from a heat source below 100℃, from both thermodynamic and economic point of view. Exergoeconomics, an algebraic thermoeconomic method, was used to analyze and optimize the systems for cost-effectiveness and exergetic efficiency. Also, the prototype of the cogeneration system was experimentally tested. The results exergoeconomic optimization show that the cost-effectiveness of the cogeneration system can be significantly improved by design parameter changes. The experimental results obtained were comparable with the results obtained from theoretical simulations.
Advisors/Committee Members: Hemmes, Kas (mentor), Woudstra, Theo (graduation committee), Blok, Kornelis (graduation committee), Purushothaman Vellayani, Aravind (graduation committee), Stougie, Lydia (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: exergoeconomics; thermoeconomics; low-grade heat; organic rankine cycle; Optimization
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APA ·
Chicago ·
MLA ·
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CSE |
Export
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APA (6th Edition):
Arumugam, S. K. (. (2017). Thermoeconomic Optimization of Organic Rankine Cycle (ORC) for Low Grade Heat Recovery at Temperatures below 100℃. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:044eec5f-c3f9-4021-a7d8-1f3303d3492f
Chicago Manual of Style (16th Edition):
Arumugam, Senthil Kumar (author). “Thermoeconomic Optimization of Organic Rankine Cycle (ORC) for Low Grade Heat Recovery at Temperatures below 100℃.” 2017. Masters Thesis, Delft University of Technology. Accessed March 05, 2021.
http://resolver.tudelft.nl/uuid:044eec5f-c3f9-4021-a7d8-1f3303d3492f.
MLA Handbook (7th Edition):
Arumugam, Senthil Kumar (author). “Thermoeconomic Optimization of Organic Rankine Cycle (ORC) for Low Grade Heat Recovery at Temperatures below 100℃.” 2017. Web. 05 Mar 2021.
Vancouver:
Arumugam SK(. Thermoeconomic Optimization of Organic Rankine Cycle (ORC) for Low Grade Heat Recovery at Temperatures below 100℃. [Internet] [Masters thesis]. Delft University of Technology; 2017. [cited 2021 Mar 05].
Available from: http://resolver.tudelft.nl/uuid:044eec5f-c3f9-4021-a7d8-1f3303d3492f.
Council of Science Editors:
Arumugam SK(. Thermoeconomic Optimization of Organic Rankine Cycle (ORC) for Low Grade Heat Recovery at Temperatures below 100℃. [Masters Thesis]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:044eec5f-c3f9-4021-a7d8-1f3303d3492f
13.
Marin, Andreea.
Optimizarea exergoeconimică a unei centrale solare termice : The exergoeconomic optimization of a solar thermal power plant.
Degree: Docteur es, Energie, 2014, Université Paris X – Nanterre
URL: http://www.theses.fr/2014PA100054
► Dans le contexte économique et énergétique actuel, la mise en œuvre de technologies à l'aide de l'énergie renouvelable comme source de chauffage offre un double…
(more)
▼ Dans le contexte économique et énergétique actuel, la mise en œuvre de technologies à l'aide de l'énergie renouvelable comme source de chauffage offre un double avantage: la réduction de la pollution et des coûts de carburant. Il y a un besoin de promouvoir les sources renouvelables d'énergie comme les sources significatives de production d'énergie pour les systèmes décentralisés. Une première étude bibliographique a été fait sur les technologies existantes pour la production d'énergie électrique à partir du solaire. Cette étude consiste dans la recherche d’une nouvelle solution de conversion de l’énergie solaire pour la production d’électricité de faible puissance. L'un des objectifs de cette thèse a été la construction d'un moteur Stirling de type gamma fonctionnant à basse différence de température, adapté à un circuit solaire (capteur plan). Le moteur Stirling a été testé en vue de comparer les résultats expérimentales avec les résultats d’un model Schmidt, fait dans le logiciel, Matlab. Un autre cycle thermodynamique étais étudie dans cette travail, le Cycle Organique Rankine (ORC). Un modèle mathématique a été développé et vérifie dans les logiciels, Thermoptim et EES (Engineering Equation Solver) avec les résultats expérimentaux pour étudier les performances d'installation avec des différentes températures de fonctionnement. La méthode exergétique et la méthode du Pincement sont utilisée pour évaluer les performances du système comme irréversibilité, destruction d’exergie et phénomènes qui se produisent dans toutes les composantes du système ORC pour améliorer son fonctionnement.
In the current economic and energy context, implementation of technologies using renewable energy as heat source has two advantages: reducing pollution and fuel costs. There is a need to promote renewable energy sources such as significant sources of power generation for decentralized systems. In the first part, it was made a literature review on existing technologies for the production of electricity with solar energy. One of the objectives of this thesis was to build a Stirling engine gamma type suitable to use solar energy (flat plate collator). The Stirling engine was tested to compare the experimental results with the results of Schmidt model, realized in the software, Matlab. Another thermodynamic cycle was studied in this work, the Organic Rankine Cycle (ORC). A mathematical model was developed and verified in software, Thermoptim and EES (Engineering Equation Solver) with experimental results to study the installation performance function of different operating temperatures. The entire system and each subsystem are analyzed according to the first and the second law of thermodynamics. The exergy method and Pinch analysis are used to evaluate the performance of the system like irreversibility and exergy destruction, phenomenon that occurs in all components of the ORC system. This analysis is to improve the operation.
Advisors/Committee Members: Grosu, Lavinia (thesis director), Dobrovicescu, Alexandru (thesis director).
Subjects/Keywords: Exergie; Cycle Stirling; ORC (Cycle Organique Rankine); Énergie solaire; Irréversibilité; Optimisation; Exergy; Stirling cycle; ORC (Organic Rankine Cycle); Solar energy; Irreversibility; Optimization; 620
Record Details
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Marin, A. (2014). Optimizarea exergoeconimică a unei centrale solare termice : The exergoeconomic optimization of a solar thermal power plant. (Doctoral Dissertation). Université Paris X – Nanterre. Retrieved from http://www.theses.fr/2014PA100054
Chicago Manual of Style (16th Edition):
Marin, Andreea. “Optimizarea exergoeconimică a unei centrale solare termice : The exergoeconomic optimization of a solar thermal power plant.” 2014. Doctoral Dissertation, Université Paris X – Nanterre. Accessed March 05, 2021.
http://www.theses.fr/2014PA100054.
MLA Handbook (7th Edition):
Marin, Andreea. “Optimizarea exergoeconimică a unei centrale solare termice : The exergoeconomic optimization of a solar thermal power plant.” 2014. Web. 05 Mar 2021.
Vancouver:
Marin A. Optimizarea exergoeconimică a unei centrale solare termice : The exergoeconomic optimization of a solar thermal power plant. [Internet] [Doctoral dissertation]. Université Paris X – Nanterre; 2014. [cited 2021 Mar 05].
Available from: http://www.theses.fr/2014PA100054.
Council of Science Editors:
Marin A. Optimizarea exergoeconimică a unei centrale solare termice : The exergoeconomic optimization of a solar thermal power plant. [Doctoral Dissertation]. Université Paris X – Nanterre; 2014. Available from: http://www.theses.fr/2014PA100054
14.
Zurawska, Monika.
The use of solar colletor for heating and electricity for a single family house.
Degree: 2016, Instituto Politécnico do Porto
URL: http://www.rcaap.pt/detail.jsp?id=oai:recipp.ipp.pt:10400.22/8268
► The presented work is related to the use of solar energy for the needs of heating and electricity for a single house located in Poland.…
(more)
▼ The presented work is related to the use of solar energy for the needs of heating and electricity for a single house located in Poland. Electricity will provided by energy conversion in the turbine by means of
Organic Rankine Cycle (ORC), in which the operating medium (water heated in solar collector) is heating refrigerator in the heating exchanger.
The solar installation is integrated with heat accumulator and wood boiler, which is used in the situation that collector is not enough to fill requirements of thermal comfort. There are chosen also all the necessary components of the system.
In the work is also performed the economic assessment, by F chart method, to evaluate the profitability of the project, taking into total costs and savings.
Advisors/Committee Members: Ribeiro, Leonardo Jose da Silva.
Subjects/Keywords: F-chart method; Solar system; Organic Rankine Cycle (ORC); Renewable energy sources; Energia
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APA ·
Chicago ·
MLA ·
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Export
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APA (6th Edition):
Zurawska, M. (2016). The use of solar colletor for heating and electricity for a single family house. (Thesis). Instituto Politécnico do Porto. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:recipp.ipp.pt:10400.22/8268
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Zurawska, Monika. “The use of solar colletor for heating and electricity for a single family house.” 2016. Thesis, Instituto Politécnico do Porto. Accessed March 05, 2021.
http://www.rcaap.pt/detail.jsp?id=oai:recipp.ipp.pt:10400.22/8268.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zurawska, Monika. “The use of solar colletor for heating and electricity for a single family house.” 2016. Web. 05 Mar 2021.
Vancouver:
Zurawska M. The use of solar colletor for heating and electricity for a single family house. [Internet] [Thesis]. Instituto Politécnico do Porto; 2016. [cited 2021 Mar 05].
Available from: http://www.rcaap.pt/detail.jsp?id=oai:recipp.ipp.pt:10400.22/8268.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zurawska M. The use of solar colletor for heating and electricity for a single family house. [Thesis]. Instituto Politécnico do Porto; 2016. Available from: http://www.rcaap.pt/detail.jsp?id=oai:recipp.ipp.pt:10400.22/8268
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
15.
Matthew, Osagie.
Modeling and Simulation of Natural Gas fired Quadruple Cycle for Power Generation.
Degree: 2019, The Catholic University of America
URL: http://hdl.handle.net/1961/cuislandora:213692
► The United States consumed 38% of its primary energy of 97.7 quadrillion Btu on the electric power sector in 2017. The electric utility power plants…
(more)
▼ The United States consumed 38% of its primary energy of 97.7 quadrillion Btu on the electric power sector in 2017. The electric utility power plants are under intense scrutiny over its environmental impacts and climate change potential. Therefore, utility companies need not only reduce the cost of electricity but also reduces fuel consumption, lower air pollutants and greenhouse gas. Improvement of performances such as energy efficiency has been a major necessity for the power industries. Over the past decades, there have been many propositions of single power cycles ranging from the steam cycle, gas turbine, organic Rankine cycle, through the combined cycle, to triple cycle and even hybridization with solid oxide fuel cell for performance enhancement in power generation. This dissertation explores the quadruple cycle, a novel hybrid of solid oxide fuel cell integrated with Brayton, Rankine and organic Rankine cycles using natural gas as the primary fuel for power generation. The mathematical system model of 5 main design configurations of a quadruple cycle is developed. The mathematical and numerical models of 5 main design configurations of a quadruple cycle of the hybridized SOFC–GT–ST–ORC was developed, and the steady material energy balance and calculations were using MATLAB and Simulink. The quadruple cycle was simulated with 16 different working fluids in the organic Rankine cycle. The parametric studies of pressure ratio, temperature, fuel flow rate fraction, airflow rate fraction, fuel utilization factor, current density, and gas turbine exhaust gas fraction on work output and system efficiency are conducted. The quadruple cycle model is validated using a combination of available literature in solid oxide fuel cell and traditional power cycles. The results show that with the quadruple cycle, an average efficiency of 69.7% is obtainable, which is 55% improvement over the prevailing single steam cycle, 17% over the modern natural gas combined cycle and about 8% on many proposed triple cycles. This high efficiency was made possible because waste heat was recovered from the solid oxide fuel cell, gas turbine, steam cycle and organic Rankine cycle.
Mechanical engineering
Gas Turbine, Organic Rankine Cycle, Solid oxide fuel cell, Steam Turbine, Working Fluids
Mechanical Engineering
Degree Awarded: Ph.D. Mechanical Engineering. The Catholic University of America
Advisors/Committee Members: The Catholic University of America (Degree granting institution), Nieh, Sen (Thesis advisor), Massoudieh, Arash (Committee member), Wolfe, Adam (Committee member), Dubois, Terry (Committee member).
Subjects/Keywords: Gas Turbine; Organic Rankine Cycle; Solid oxide fuel cell; Steam Turbine; Working Fluids
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APA (6th Edition):
Matthew, O. (2019). Modeling and Simulation of Natural Gas fired Quadruple Cycle for Power Generation. (Thesis). The Catholic University of America. Retrieved from http://hdl.handle.net/1961/cuislandora:213692
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Matthew, Osagie. “Modeling and Simulation of Natural Gas fired Quadruple Cycle for Power Generation.” 2019. Thesis, The Catholic University of America. Accessed March 05, 2021.
http://hdl.handle.net/1961/cuislandora:213692.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Matthew, Osagie. “Modeling and Simulation of Natural Gas fired Quadruple Cycle for Power Generation.” 2019. Web. 05 Mar 2021.
Vancouver:
Matthew O. Modeling and Simulation of Natural Gas fired Quadruple Cycle for Power Generation. [Internet] [Thesis]. The Catholic University of America; 2019. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1961/cuislandora:213692.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Matthew O. Modeling and Simulation of Natural Gas fired Quadruple Cycle for Power Generation. [Thesis]. The Catholic University of America; 2019. Available from: http://hdl.handle.net/1961/cuislandora:213692
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
16.
Veloso Freire, José Antonio.
Aprovechamiento energético mediante ciclo orgánico de Rankine
.
Degree: 2019, Universidad da Coruña
URL: http://hdl.handle.net/2183/24593
► [RESUMEN] En el presente trabajo va destinado al aprovechamiento energético en motores de baja potencia mediante un ciclo orgánico de Rankine, ya que el uso…
(more)
▼ [RESUMEN]
En el presente trabajo va destinado al aprovechamiento energético en motores de baja potencia mediante un ciclo orgánico de
Rankine, ya que el uso de un circuito de vapor resultaría inviable en buques de pequeña potencia debido al espacio reducido.
Un ciclo ORC sería más factible para el aprovechamiento energético en este tipo de buques, ya que su espacio es más reducido. Este tipo de buques, según la OMI; son los que más CO2 emiten a la atmósfera, pero por su reducido tamaño no es viable un aprovechamiento energético. A diferencia de buques de gran tonelaje donde el espacio no es un problema. Los únicos equipos factibles para el aprovechamiento en este tipo de buques sería un ciclo orgánico.
Además de instalar un ORC, se va a diseñar un sistema compacto, es decir; un único ciclo. Los existentes actualmente se usan para el aprovechamiento de calor residual de forma aislada, es decir; uno para el agua de camisas y otro para los gases de escape. Se va a diseñar un ciclo único que aproveche todo el calor residual posible de un motor de combustión.
Advisors/Committee Members: Romero Gómez, Manuel (advisor).
Subjects/Keywords: Ciclo orgánico;
Calor residual;
ORC(Organic Rankine Cycle);
Aprovechamiento energético;
Motores de combustión
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to Zotero / EndNote / Reference
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APA (6th Edition):
Veloso Freire, J. A. (2019). Aprovechamiento energético mediante ciclo orgánico de Rankine
. (Masters Thesis). Universidad da Coruña. Retrieved from http://hdl.handle.net/2183/24593
Chicago Manual of Style (16th Edition):
Veloso Freire, José Antonio. “Aprovechamiento energético mediante ciclo orgánico de Rankine
.” 2019. Masters Thesis, Universidad da Coruña. Accessed March 05, 2021.
http://hdl.handle.net/2183/24593.
MLA Handbook (7th Edition):
Veloso Freire, José Antonio. “Aprovechamiento energético mediante ciclo orgánico de Rankine
.” 2019. Web. 05 Mar 2021.
Vancouver:
Veloso Freire JA. Aprovechamiento energético mediante ciclo orgánico de Rankine
. [Internet] [Masters thesis]. Universidad da Coruña; 2019. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/2183/24593.
Council of Science Editors:
Veloso Freire JA. Aprovechamiento energético mediante ciclo orgánico de Rankine
. [Masters Thesis]. Universidad da Coruña; 2019. Available from: http://hdl.handle.net/2183/24593
17.
Holmgren, Magnus.
Utveckling av dataanalysprogram för Opcon Powerbox.
Degree: Physics and Astronomy, 2010, Uppsala University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-121736
► Opcon Powerbox is a product developed by Opcon together with the underlying company SRM (Svenska Rotor Maskiner) where surplus heat from the industry is…
(more)
▼ Opcon Powerbox is a product developed by Opcon together with the underlying company SRM (Svenska Rotor Maskiner) where surplus heat from the industry is used through an Organic Rankine Cycle (ORC)–process to produce electricity. An ORC-process is a thermodynamic circle process in which a refrigerant is used as the working fluid. The refrigerant makes it possible for the circle process to operate at lower temperatures than the conventional Rankine process.
In this master’s thesis a data analysis software for the Opcon Powerbox has been developed in which measurement data is retrieved and handled from the Opcon Powerbox. The software performs calculations and analysis on the data with which the system can be evaluated.
This thesis has been carried out with SRM.
Subjects/Keywords: dataanalysprogram; Powerbox; ORC; organic rankine cycle
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APA (6th Edition):
Holmgren, M. (2010). Utveckling av dataanalysprogram för Opcon Powerbox. (Thesis). Uppsala University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-121736
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Holmgren, Magnus. “Utveckling av dataanalysprogram för Opcon Powerbox.” 2010. Thesis, Uppsala University. Accessed March 05, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-121736.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Holmgren, Magnus. “Utveckling av dataanalysprogram för Opcon Powerbox.” 2010. Web. 05 Mar 2021.
Vancouver:
Holmgren M. Utveckling av dataanalysprogram för Opcon Powerbox. [Internet] [Thesis]. Uppsala University; 2010. [cited 2021 Mar 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-121736.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Holmgren M. Utveckling av dataanalysprogram för Opcon Powerbox. [Thesis]. Uppsala University; 2010. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-121736
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Delft University of Technology
18.
Roumpedakis, Tryfonas (author).
Techo-economic investigations of a solar driven ORC-sorption system for combined cooling, heating and power.
Degree: 2018, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:01b282ff-3402-464e-98f4-aa664f704618
► The rapid growth of power systems supplied by sustainable energy sources and the attempt towards the decrease of CO₂ emissions has resulted in the increase…
(more)
▼ The rapid growth of power systems supplied by sustainable energy sources and the attempt towards the decrease of CO₂ emissions has resulted in the increase of decentralized energy systems over the last decades. Tri-generation systems utilizing an
Organic Rankine Cycle (ORC) can offer a reliable alternative towards that direction. In particular, the solar
Organic Rankine Cycle can reduce down to zero the footprint of such systems. In this study, an ORC is designed such so that the rejected heat by its condenser can be used to drive a sorption heat pump. The design process of the hybrid system includes the selection of the heat transfer fluid flowing through the collectors, the working fluid and the design conditions of the ORC as well as the design conditions of the sorption heat pump. The system is evaluated for its performance in the regions of Athens, Greece and Amsterdam, Netherlands. Two configurations have been evaluated in respect with the auxiliary system; one using the existing gas boiler to provide additional heat to the sorption heat pump and one using the conventional air conditioning units to directly provide the excess of the thermal load. Moreover, the investigated scenarios include both residential as well as utility buildings in both regions. The results are compared with the ones from conventional systems, using a gas boiler and air conditioning units. Multi-objective optimization has been conducted towards the maximization of the exergy efficiency and the minimization of the payback period by determining the optimal storage tank’s volume and the solar collector’s area. The results indicated that the proposed system is operating more efficiently in Amsterdam, in which is also achieving a payback period as low as 14 years, when a gas boiler is used as the auxiliary system. The performance of the system is slightly worse in Athens, mainly due to the higher cooling loads, during which the sorption heat pump operates with low COPs. Apart from the solar thermal cooling, a solar electric cooling system is evaluated for all the aforementioned scenarios, utilizing a PV field driving a conventional vapor compression chiller (VCC). According to the results, the PV-VCC system is a better solution in terms of the payback period, reporting payback periods as low as 6 and 9 years for Athens and Amsterdam, respectively, in the case of a residential building. In a similar way to the solar thermal cooling, for the case of utility buildings the performance is slightly worse, resulting in a payback period of approximately 10 years for Athens, while the respective value for Amsterdam is around 21 years, mainly due to the lower availability of solar radiation.
Advisors/Committee Members: Infante Ferreira, Carlos (mentor), Delft University of Technology (degree granting institution).
Subjects/Keywords: Trigeneration; Organic Rankine Cycle; Adsorption Cooling; Absorption Refrigeration; Techno-economic analysis; Genetic Algorithm; Solar cooling
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APA (6th Edition):
Roumpedakis, T. (. (2018). Techo-economic investigations of a solar driven ORC-sorption system for combined cooling, heating and power. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:01b282ff-3402-464e-98f4-aa664f704618
Chicago Manual of Style (16th Edition):
Roumpedakis, Tryfonas (author). “Techo-economic investigations of a solar driven ORC-sorption system for combined cooling, heating and power.” 2018. Masters Thesis, Delft University of Technology. Accessed March 05, 2021.
http://resolver.tudelft.nl/uuid:01b282ff-3402-464e-98f4-aa664f704618.
MLA Handbook (7th Edition):
Roumpedakis, Tryfonas (author). “Techo-economic investigations of a solar driven ORC-sorption system for combined cooling, heating and power.” 2018. Web. 05 Mar 2021.
Vancouver:
Roumpedakis T(. Techo-economic investigations of a solar driven ORC-sorption system for combined cooling, heating and power. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Mar 05].
Available from: http://resolver.tudelft.nl/uuid:01b282ff-3402-464e-98f4-aa664f704618.
Council of Science Editors:
Roumpedakis T(. Techo-economic investigations of a solar driven ORC-sorption system for combined cooling, heating and power. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:01b282ff-3402-464e-98f4-aa664f704618
Universitat Politècnica de València
19.
Royo Pascual, Lucía.
Study of Organic Rankine Cycles for Waste Heat Recovery in Transportation Vehicles
.
Degree: 2017, Universitat Politècnica de València
URL: http://hdl.handle.net/10251/84013
► Regulations for ICE-based transportation in the EU seek carbon dioxide emissions lower than 95 g CO2/km by 2020. In order to fulfill these limits, improvements…
(more)
▼ Regulations for ICE-based transportation in the EU seek carbon dioxide
emissions lower than 95 g CO2/km by 2020. In order to fulfill these
limits, improvements in vehicle fuel consumption have to be achieved. One
of the main losses of ICEs happens in the exhaust line. Internal combustion
engines transform chemical energy into mechanical energy through
combustion; however, only about 15-32% of this energy is effectively used
to produce work, while most of the fuel energy is wasted through exhaust
gases and coolant. Therefore, these sources can be exploited to improve the
overall efficiency of the engine. Between these sources, exhaust gases show
the largest potential of Waste Heat Recovery (WHR) due to its high level of
exergy. Regarding WHR technologies,
Rankine cycles are considered as the
most promising candidates for improving Internal Combustion Engines.
However, the implementation of this technology in modern passenger cars
requires additional features to achieve a compact integration and controllability
in the engine. While industrial applications typically operates in
steady state operating points, there is a huge challenge taking into account
its impact in the engine during typical daily driving profiles.
This thesis contributes to the knowledge and characterization of an
Organic Rankine Cycle coupled with an Internal Combustion Engine using
ethanol as working fluid and a swash-plate expander as expansion machine.
The main objective of this research work is to obtain and quantify the
potential of
Organic Rankine Cycles for the use of residual energy in
automotive engines. To do this, an experimental ORC test bench was
designed and built at CMT (Polytechnic University of Valencia), which can
be coupled to different types of automotive combustion engines. Using
these results, an estimation of the main variables of the
cycle was obtained
both in stationary and transient operating points. A potential of increasing
ICE mechanical efficiency up to 3.7% could be reached at points of high
load installing an ORC in a conventional turbocharged gasoline engine.
Regarding transient conditions, a slightly simple and robust control based
on adaptive PIDs, allows the control of the ORC in realistic driving profiles.
High loads and hot conditions should be the starting ideal conditions to
test and validate the control of the ORC in order to achieve high exhaust
temperatures that justify the feasibility of the system.
In order to deepen in the viability and characteristics of this particular
application, some theoretical studies were done. A 1D model was developed
using LMS Imagine.Lab Amesim platform. A potential improvement
of 2.5% in fuel conversion efficiency was obtained at the high operating
points as a direct consequence of the 23.5 g/kWh reduction in bsfc. To
conclude, a thermo-economic study was developed taking into account
the main elements of the installation costs and a minimum Specific Investment
Cost value of 2030 €/kW was obtained. Moreover, an exergetic
study showed that a total amount of 3.75 kW, 36.5% of…
Advisors/Committee Members: Dolz Ruiz, Vicente (advisor).
Subjects/Keywords: Gasoline engine;
Waste Heat Recovery;
Organic Rankine Cycle;
Ethanol;
Swash-plate expander
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APA (6th Edition):
Royo Pascual, L. (2017). Study of Organic Rankine Cycles for Waste Heat Recovery in Transportation Vehicles
. (Doctoral Dissertation). Universitat Politècnica de València. Retrieved from http://hdl.handle.net/10251/84013
Chicago Manual of Style (16th Edition):
Royo Pascual, Lucía. “Study of Organic Rankine Cycles for Waste Heat Recovery in Transportation Vehicles
.” 2017. Doctoral Dissertation, Universitat Politècnica de València. Accessed March 05, 2021.
http://hdl.handle.net/10251/84013.
MLA Handbook (7th Edition):
Royo Pascual, Lucía. “Study of Organic Rankine Cycles for Waste Heat Recovery in Transportation Vehicles
.” 2017. Web. 05 Mar 2021.
Vancouver:
Royo Pascual L. Study of Organic Rankine Cycles for Waste Heat Recovery in Transportation Vehicles
. [Internet] [Doctoral dissertation]. Universitat Politècnica de València; 2017. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10251/84013.
Council of Science Editors:
Royo Pascual L. Study of Organic Rankine Cycles for Waste Heat Recovery in Transportation Vehicles
. [Doctoral Dissertation]. Universitat Politècnica de València; 2017. Available from: http://hdl.handle.net/10251/84013
20.
Lecompte, Steven.
Performance evaluation of organic Rankine cycle architectures : application to waste heat valorisation.
Degree: 2016, Ghent University
URL: http://hdl.handle.net/1854/LU-7223134
► In our society, there is an ever increasing need for electricity. However, today most of the electricity is generated by burning fossil fuels in a…
(more)
▼ In our society, there is an ever increasing need for electricity. However, today most of the electricity is generated by burning fossil fuels in a thermal power plant. A proposed alternative is to make use of low temperature heat from renewable sources (geothermal and solar) or waste heat (excess heat that is dumped into the atmosphere) in an
organic Rankine cycle (ORC) to generate electricity. The purpose of the presented work is to support further adoption of ORC technology. To achieve this, two main challenges need to be resolved. First, sound criteria should be devised to compare and size ORCs and secondly the performance of the ORC should be increased further. From literature it is clear that novel ORC architectures have the opportunity to increase the performance of the basic subcritical ORC. However these studies are not cross comparable. As such, a new screening approach is created which rigorously compares and quantifies the potential of three different ORC architectures. Secondly, the sizing and the financial appraisal of the ORC is tackled by introducing a multi-objective optimization which combines financial and thermodynamic criteria in the optimization objectives. Finally, experimentally validated part-load models of the ORC were developed. These part-load models are crucial to predict the actual power output of time varying heat sources like waste heat streams. In addition, the models permit to investigate the concept of retrofitting existing subcritical ORCs to work under the more optimal working regime of partial evaporation.
Advisors/Committee Members: De Paepe, Michel, van den Broek, Martijn.
Subjects/Keywords: Technology and Engineering; organic Rankine cycle; numerical optimization; thermodynamics; experimental; thermo-economic
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Manager
APA (6th Edition):
Lecompte, S. (2016). Performance evaluation of organic Rankine cycle architectures : application to waste heat valorisation. (Thesis). Ghent University. Retrieved from http://hdl.handle.net/1854/LU-7223134
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Lecompte, Steven. “Performance evaluation of organic Rankine cycle architectures : application to waste heat valorisation.” 2016. Thesis, Ghent University. Accessed March 05, 2021.
http://hdl.handle.net/1854/LU-7223134.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lecompte, Steven. “Performance evaluation of organic Rankine cycle architectures : application to waste heat valorisation.” 2016. Web. 05 Mar 2021.
Vancouver:
Lecompte S. Performance evaluation of organic Rankine cycle architectures : application to waste heat valorisation. [Internet] [Thesis]. Ghent University; 2016. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1854/LU-7223134.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lecompte S. Performance evaluation of organic Rankine cycle architectures : application to waste heat valorisation. [Thesis]. Ghent University; 2016. Available from: http://hdl.handle.net/1854/LU-7223134
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Canterbury
21.
Taylor, Leighton John.
Development of a low temperature geothermal organic rankine cycle standard.
Degree: Master of Mechanical Engineering, 2015, University of Canterbury
URL: http://dx.doi.org/10.26021/1215
► The growth in renewable electricity generation is forecast to continue as fossil fuel levels decrease and carbon dioxide emissions are penalized. The growth in geothermal…
(more)
▼ The growth in renewable electricity generation is forecast to continue as fossil fuel levels decrease and carbon dioxide emissions are penalized. The growth in geothermal is becoming constrained as conventional high-temperature sources are fully exploited. Geothermal can be a cost competitive base load power source. Governments and utilities are looking at the potential of electricity generation from low temperature geothermal resources for future development. This technology, unlike the high and medium temperature, is not mature and there are a number of companies looking at entering the Organic Rankine Cycle (ORC) market.
This thesis aims to provide a necessary step for reliable commercial develop this technology by developing the first draft of a low temperature geothermal ORC standard. The standard outlines the
critical stages of a geothermal ORC project as the Prospecting stage; Pre-Feasibility stage, Feasibility stage, and the Detailed Design stage. The standard is unlike other standards that are used to design one
component; this standard guides the engineers though the various critical steps of the ORC design to correctly assess the geothermal resource and to inform design and investment decisions.
The standard provides particular guidance on critical factors in ORC design, primarily the working fluid selection and component selection limitations. Experienced industry engineers have provided advice and
insight regarding the critical design points and processes. The draft standard was reviewed by a number of geothermal industry engineers who have worked with large scale, conventional ORCs. They each
commented on the standard from their prospective in the industry and gave general feedback was that it is a technically relevant standard that can be used as a potential start point to develop a new standard for
the low temperature binary ORC industry. The final draft standard has been submitted to the ISO for consideration.
This thesis first sets out the general background on the state of the art and the industry for lowtemperature binary ORC power plants, and provides the review assessment of the standard draft.
However, the bulk of the thesis is the standard itself. The standard represents a substantial contribution to
the mechanical and thermal systems engineering field.
Subjects/Keywords: Organic Rankine Cycle (ORC); Geothermal; Standard; Energy; Renewable; Prospecting; Pre-Feasibility; Feasibility; Detailed Design
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APA ·
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MLA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Taylor, L. J. (2015). Development of a low temperature geothermal organic rankine cycle standard. (Masters Thesis). University of Canterbury. Retrieved from http://dx.doi.org/10.26021/1215
Chicago Manual of Style (16th Edition):
Taylor, Leighton John. “Development of a low temperature geothermal organic rankine cycle standard.” 2015. Masters Thesis, University of Canterbury. Accessed March 05, 2021.
http://dx.doi.org/10.26021/1215.
MLA Handbook (7th Edition):
Taylor, Leighton John. “Development of a low temperature geothermal organic rankine cycle standard.” 2015. Web. 05 Mar 2021.
Vancouver:
Taylor LJ. Development of a low temperature geothermal organic rankine cycle standard. [Internet] [Masters thesis]. University of Canterbury; 2015. [cited 2021 Mar 05].
Available from: http://dx.doi.org/10.26021/1215.
Council of Science Editors:
Taylor LJ. Development of a low temperature geothermal organic rankine cycle standard. [Masters Thesis]. University of Canterbury; 2015. Available from: http://dx.doi.org/10.26021/1215
Clemson University
22.
Rathod, Dhruvang.
Evaporator Modeling and an Optimal Control Strategy Development of an Organic Rankine Cycle Waste Heat Recovery System for a Heavy Duty Diesel Engine Application.
Degree: PhD, Automotive Engineering, 2019, Clemson University
URL: https://tigerprints.clemson.edu/all_dissertations/2704
► The Organic Rankine Cycle (ORC) has proven to be a promising technology for Waste Heat Recovery (WHR) systems in heavy duty diesel engine applications.…
(more)
▼ The
Organic Rankine Cycle (ORC) has proven to be a promising technology for Waste Heat Recovery (WHR) systems in heavy duty diesel engine applications. However, due to the highly transient heat source, controlling the working fluid flow through the ORC system and maximizing the heat recovery is a challenge for real time application. To that end, this research resulted in the following main developments.
The first new development is in the area of heat exchanger modeling. The heat exchanger is a key component within the WHR system and it governs the dynamics of the complete ORC system. The heat exchanger model is extended using a thermal image data to improve its phase length prediction capability. It’s shown that the new identified empirical equations help improve the phase length estimation by 43% over a set of transient experiments. As a result, the model can be used to develop an improved control oriented moving boundary model and to provide insights into evaporator design.
The second new development is the advancement of the control design of an ORC system. With advanced knowledge of the heat source dynamics, there is potential to enhance power optimization from the WHR system through predictive optimal control. The proposed approach in this this dissertation is a look-ahead control strategy where, the future vehicle speed is predicted utilizing road topography and V2V connectivity. The forecasted vehicle speed is utilized to predict the engine speed and torque, which facilitates estimation of the engine exhaust conditions used in the ORC control model. In the simulation study, a reference tracking controller is designed based on the Model Predictive Control (MPC) methodology. Two variants of Non-linear MPC (NMPC) are evaluated: an NMPC with look-ahead exhaust conditions and a baseline NMPC without the knowledge of future exhaust conditions. Simulation results show no particular improvement to working fluid superheat tracking at the evaporator outlet via the look-ahead strategy for a drive
cycle. However, the look-ahead control strategy does provide a substantial reduction in system control effort via dampening the heavily transient working fluid pump actuation, enhancing pump longevity, health, and reducing pump power consumption. This reduction in pump actuation helps the NMPC with preview to maintain the superheat lower than the NMPC without this feature for certain frequency of the exhaust conditions. Overall, NMPC with preview feature can help reduce parasitic losses, like pump power and improve power generation.
The third development addresses the modeling errors and measurement inaccuracies for NMPC implementation. NMPC is inherently a state feedback system and for that reason an Extended Kalman Filter (EKF) is used to estimate unmeasurable states inside the ORC evaporators based on exhaust gas and working fluid temperatures. Since it is not realistic to expect that the system model will perfectly describe the behavior of the evaporator dynamics in all operating conditions, the…
Advisors/Committee Members: Dr. Zoran Filipi, Committee Chair, Dr. Mark Hoffman, Dr. Ardalan Vahidi, Dr. Robert Prucka.
Subjects/Keywords: Disturbance rejection; Experimental; Model Predictive Control; Organic Rankine Cycle; Waste Heat Recovery; Automotive Engineering
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APA (6th Edition):
Rathod, D. (2019). Evaporator Modeling and an Optimal Control Strategy Development of an Organic Rankine Cycle Waste Heat Recovery System for a Heavy Duty Diesel Engine Application. (Doctoral Dissertation). Clemson University. Retrieved from https://tigerprints.clemson.edu/all_dissertations/2704
Chicago Manual of Style (16th Edition):
Rathod, Dhruvang. “Evaporator Modeling and an Optimal Control Strategy Development of an Organic Rankine Cycle Waste Heat Recovery System for a Heavy Duty Diesel Engine Application.” 2019. Doctoral Dissertation, Clemson University. Accessed March 05, 2021.
https://tigerprints.clemson.edu/all_dissertations/2704.
MLA Handbook (7th Edition):
Rathod, Dhruvang. “Evaporator Modeling and an Optimal Control Strategy Development of an Organic Rankine Cycle Waste Heat Recovery System for a Heavy Duty Diesel Engine Application.” 2019. Web. 05 Mar 2021.
Vancouver:
Rathod D. Evaporator Modeling and an Optimal Control Strategy Development of an Organic Rankine Cycle Waste Heat Recovery System for a Heavy Duty Diesel Engine Application. [Internet] [Doctoral dissertation]. Clemson University; 2019. [cited 2021 Mar 05].
Available from: https://tigerprints.clemson.edu/all_dissertations/2704.
Council of Science Editors:
Rathod D. Evaporator Modeling and an Optimal Control Strategy Development of an Organic Rankine Cycle Waste Heat Recovery System for a Heavy Duty Diesel Engine Application. [Doctoral Dissertation]. Clemson University; 2019. Available from: https://tigerprints.clemson.edu/all_dissertations/2704
Université de Lorraine
23.
Mabrouk, Mohamed Tahar.
Production optimale d’énergie pour une communauté à petite échelle : application à l’optimisation d’une centrale solaire hybride produisant électricité et chaleur : Optimal energy delivery at a small community scale : application to the optimization of a hybrid solar power plant producing electricity and heat.
Degree: Docteur es, Mécanique et énergétique, 2015, Université de Lorraine
URL: http://www.theses.fr/2015LORR0163
► Ce travail traite la modélisation et l'optimisation des centrales solaires thermodynamiques à concentration produisant de l'électricité pour l'électrification des zones rurales isolées et mal raccordées…
(more)
▼ Ce travail traite la modélisation et l'optimisation des centrales solaires thermodynamiques à concentration produisant de l'électricité pour l'électrification des zones rurales isolées et mal raccordées au réseau électrique. D’abord, un modèle optique et thermique détaillé des concentrateurs solaires cylindro-paraboliques est présenté permettant l'identification de capteurs existants et la création de corrélations qui peuvent être injectées dans un modèle plus global. Dans un second temps, un modèle original d'un stock de chaleur stratifié de type « lit de roche » est développé. Le nouveau modèle proposé permet de déterminer analytiquement le profil de température dans le stock à n'importe quel instant dans le cas d'une température d'entrée régulée. Ensuite, deux alternatives de bloc moteur sont modélisées : le moteur Stirling et le Cycle Organique de Rankine (ORC acronyme anglais pour Organic Rankine Cycle). Concernant le moteur Stirling, une revue critique des modèles existants a été effectuée. Certains de ces modèles ont été implémentés et complétés par des modèles originaux des pertes par fuite de matière et par effet navette. Le cycle organique de Rankine, lui, est modélisé par un modèle orientée vers l'optimisation. Enfin, une optimisation mono et multicritère d’une centrale solaire est effectuée. La configuration étudiée est équipée d’un stock de chaleur et d’une chaudière d’appoint. Elle est optimisée selon trois critères : le coût moyen actualisé de l'électricité (LCOE acronyme anglais pour Levelized Cost Of Electricity), le rendement énergétique de la centrale et la quantité de CO2 émise par Kilowatt heure d'électricité produite
This work deals with the modelling and the optimization of thermodynamic solar power plants intended to supply electricity to isolated locations. Firstly, a state of the art of solar collectors is achieved and a model for parabolic trough collectors is proposed. This model is used for actual collectors identification. It is used also to propose correlations to be introduced in the whole system model. In a second time, a state of the art of energy storage technologies is conducted and an original model of a packed bed storage tank is proposed. This model gives an explicit solution of the temperature inside the tank without using a time step based numerical resolution. Two alternatives for the power block are given: Stirling engines and Organic Rankine Cycles. For Stirling engines, a critical review of existing models is performed. Some losses occurring in Stirling engines are not well documented in the literature as leakage losses at the power piston and displacer gap losses. Therefore, original models are proposed to estimate these losses. When compared to former models in the literature, the new model of the displacer gap losses demonstrates clearly that it is very important to use decoupled models with caution. Concerning the ORC, an optimization-oriented model is proposed. Finally, a mono and multi-objective optimization of a solar power plant is performed. The optimized…
Advisors/Committee Members: Feidt, Michel (thesis director), Kheiri, Abdelhamid (thesis director).
Subjects/Keywords: Centrales solaires hybrides; Stockage de chaleur; Optimisation énergétique; Moteur Stirling; Cycle organique de Rankine; Hybrid solar power plants; Thermal energy storage; Optimization; Stirling engines; Organic Rankine cycle; 621.199
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APA (6th Edition):
Mabrouk, M. T. (2015). Production optimale d’énergie pour une communauté à petite échelle : application à l’optimisation d’une centrale solaire hybride produisant électricité et chaleur : Optimal energy delivery at a small community scale : application to the optimization of a hybrid solar power plant producing electricity and heat. (Doctoral Dissertation). Université de Lorraine. Retrieved from http://www.theses.fr/2015LORR0163
Chicago Manual of Style (16th Edition):
Mabrouk, Mohamed Tahar. “Production optimale d’énergie pour une communauté à petite échelle : application à l’optimisation d’une centrale solaire hybride produisant électricité et chaleur : Optimal energy delivery at a small community scale : application to the optimization of a hybrid solar power plant producing electricity and heat.” 2015. Doctoral Dissertation, Université de Lorraine. Accessed March 05, 2021.
http://www.theses.fr/2015LORR0163.
MLA Handbook (7th Edition):
Mabrouk, Mohamed Tahar. “Production optimale d’énergie pour une communauté à petite échelle : application à l’optimisation d’une centrale solaire hybride produisant électricité et chaleur : Optimal energy delivery at a small community scale : application to the optimization of a hybrid solar power plant producing electricity and heat.” 2015. Web. 05 Mar 2021.
Vancouver:
Mabrouk MT. Production optimale d’énergie pour une communauté à petite échelle : application à l’optimisation d’une centrale solaire hybride produisant électricité et chaleur : Optimal energy delivery at a small community scale : application to the optimization of a hybrid solar power plant producing electricity and heat. [Internet] [Doctoral dissertation]. Université de Lorraine; 2015. [cited 2021 Mar 05].
Available from: http://www.theses.fr/2015LORR0163.
Council of Science Editors:
Mabrouk MT. Production optimale d’énergie pour une communauté à petite échelle : application à l’optimisation d’une centrale solaire hybride produisant électricité et chaleur : Optimal energy delivery at a small community scale : application to the optimization of a hybrid solar power plant producing electricity and heat. [Doctoral Dissertation]. Université de Lorraine; 2015. Available from: http://www.theses.fr/2015LORR0163
24.
Di Cairano, Luca.
Etude d'un système réversible climatisation/cycle Rankine organique : application au cas du véhicule terrestre : Study of a reversible air conditioning/ organic Rankine cycle system : application to light-duty vehicles.
Degree: Docteur es, Energétiques et procédés, 2019, Paris Sciences et Lettres (ComUE)
URL: http://www.theses.fr/2019PSLEM066
► La récupération de chaleur dans les véhicules est une solution prometteuse permettant de réduire la consommation du moteur et de ses émissions. Les fortes contraintes…
(more)
▼ La récupération de chaleur dans les véhicules est une solution prometteuse permettant de réduire la consommation du moteur et de ses émissions. Les fortes contraintes de poids, compacité et coût présentes dans le domaine automobile empêchent l’intégration d’un système de récupération de chaleur dans le véhicule. Une solution proposée dans ce travail consiste en un système de multi-génération appelé ReverCycle. Ce dernier fonctionne avec trois modes: climatisation à compression de vapeur, cycle de Rankine Organique (ORC) et cycle de réfrigération à éjecteur. Le système peut assurer un seul mode de fonctionnement à la fois. Les avantages du système sont sa compacité et son coût réduit étant donné la possibilité d’exploiter les composants du système de climatisation déjà présents dans le véhicule. En effet, le compresseur scroll de la climatisation peut être converti en machine réversible compresseur/turbine et le condenseur peut être mutualisé pour les trois modes de fonctionnement. Une double démarche de modélisation et d’expérimentation a été menée pour évaluer le potentiel de réduction de la consommation de ReverCycle et pour vérifier sa faisabilité technique. Un modèle global du véhicule a été développé pour reproduire les conditions de fonctionnement dynamique du véhicule et pour décrire l’interaction entre ses différents sous-systèmes. Le modèle a ensuite permis de calculer le gain en consommation moyenné sur une année pour différentes régions climatiques. Deux différentes architectures de véhicules ont été étudiées : un véhicule conventionnel et un véhicule hybride série. Pour un véhicule conventionnel, le gain en consommation maximal est obtenu dans un climat océanique (e.g. Paris) avec une valeur de 2,1% avec un démarrage à chaud du moteur et 1,3% avec un démarrage à froid. Le cycle de conduite de référence pour l’évaluation du gain est le cycle WLTC (Worldwide harmonized Light vehicles Test Cycles). Dans le cas du véhicule hybride série, le gain en consommation maximal est obtenu dans un climat continental (e.g. Moscou) avec une valeur de 2,2% avec un démarrage à chaud du moteur et 1,2% avec un démarrage à froid. La réalisation d’une preuve de concept de ReverCycle a permis de valider sa faisabilité technique. Les essais se sont focalisés surtout sur le mode de fonctionnement en ORC. Les résultats des essais ont montré un rendement maximal de récupération pour le cycle de 3,9% sur un point de fonctionnement stabilisé. Le rendement maximal moyenné sur un cycle dynamique, représentatif des conditions opératoires sur un véhicule conventionnel, a été de 3,3%.
In a light duty vehicle, waste heat recovery is a promising solution for reducing engine fuel consumption and emissions. The strong compactness, weight and cost requirements of the automotive sector are preventing the integration of waste heat recovery systems in vehicles. This work is proposing as a possible solution a multi-generation system called hereafter ReverCycle. ReverCycle is a system with three operating modes: vapor compression air…
Advisors/Committee Members: Bouallou, Chakib (thesis director).
Subjects/Keywords: Récupération de chaleur; Cycle Rankine Organique; Climatisation automobile; Compresseur; Turbine; Éjecteur; Waste heat recovery; Organic Rankine Cycle; Automotive air conditioning; Compressor; Expander; Ejector; 621.4
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APA ·
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APA (6th Edition):
Di Cairano, L. (2019). Etude d'un système réversible climatisation/cycle Rankine organique : application au cas du véhicule terrestre : Study of a reversible air conditioning/ organic Rankine cycle system : application to light-duty vehicles. (Doctoral Dissertation). Paris Sciences et Lettres (ComUE). Retrieved from http://www.theses.fr/2019PSLEM066
Chicago Manual of Style (16th Edition):
Di Cairano, Luca. “Etude d'un système réversible climatisation/cycle Rankine organique : application au cas du véhicule terrestre : Study of a reversible air conditioning/ organic Rankine cycle system : application to light-duty vehicles.” 2019. Doctoral Dissertation, Paris Sciences et Lettres (ComUE). Accessed March 05, 2021.
http://www.theses.fr/2019PSLEM066.
MLA Handbook (7th Edition):
Di Cairano, Luca. “Etude d'un système réversible climatisation/cycle Rankine organique : application au cas du véhicule terrestre : Study of a reversible air conditioning/ organic Rankine cycle system : application to light-duty vehicles.” 2019. Web. 05 Mar 2021.
Vancouver:
Di Cairano L. Etude d'un système réversible climatisation/cycle Rankine organique : application au cas du véhicule terrestre : Study of a reversible air conditioning/ organic Rankine cycle system : application to light-duty vehicles. [Internet] [Doctoral dissertation]. Paris Sciences et Lettres (ComUE); 2019. [cited 2021 Mar 05].
Available from: http://www.theses.fr/2019PSLEM066.
Council of Science Editors:
Di Cairano L. Etude d'un système réversible climatisation/cycle Rankine organique : application au cas du véhicule terrestre : Study of a reversible air conditioning/ organic Rankine cycle system : application to light-duty vehicles. [Doctoral Dissertation]. Paris Sciences et Lettres (ComUE); 2019. Available from: http://www.theses.fr/2019PSLEM066
Brno University of Technology
25.
Švábenský, Pavel.
Výroba elektřiny z odpadního tepla: Low-potential heat utilization for electricity generation.
Degree: 2019, Brno University of Technology
URL: http://hdl.handle.net/11012/5723
► This work is concentrating on production of elektricity from waste heat. The work mainly deals with Organic Rankine cycle (further referred to as ORC), basic…
(more)
▼ This work is concentrating on production of elektricity from waste heat. The work mainly deals with
Organic Rankine cycle (further referred to as ORC), basic theory of ORC is summarised here and for comparison is given Rankin-Clausius
cycle as well. Further part of the work is dedicated to ORC unit as a system, an overview of manufacturers of ORC units and their range of products is given here as well, short comparison of ORC units was carried out. Further the work is dealing with problems of the incinerator and the possibility of using the ORC unit. The conclusion of the work is dedicated to the ekonomic evaluation of the application of ORC in the Czech Republic considering the implementation study.
Advisors/Committee Members: Pavlas, Martin (advisor), Frýba, Lukáš (referee).
Subjects/Keywords: Organický Rankinův cyklus; Rankin – Clausiův cyklus; ORC jednotka; odpadní teplo; spalovna; Organic Rankine cycle; Rankine-Clausius cycle; ORC unit; waste heat; incinerator
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APA (6th Edition):
Švábenský, P. (2019). Výroba elektřiny z odpadního tepla: Low-potential heat utilization for electricity generation. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/5723
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Švábenský, Pavel. “Výroba elektřiny z odpadního tepla: Low-potential heat utilization for electricity generation.” 2019. Thesis, Brno University of Technology. Accessed March 05, 2021.
http://hdl.handle.net/11012/5723.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Švábenský, Pavel. “Výroba elektřiny z odpadního tepla: Low-potential heat utilization for electricity generation.” 2019. Web. 05 Mar 2021.
Vancouver:
Švábenský P. Výroba elektřiny z odpadního tepla: Low-potential heat utilization for electricity generation. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/11012/5723.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Švábenský P. Výroba elektřiny z odpadního tepla: Low-potential heat utilization for electricity generation. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/5723
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Brno University of Technology
26.
Macháček, Pavel.
Tepelné motory pro využívání odpadního tepla: Heat engines for waste heat utilization.
Degree: 2019, Brno University of Technology
URL: http://hdl.handle.net/11012/3174
► This thesis deals with heat cycles for waste heat utilization and their comparison. The first part describes particular heat cycles, their basic modifications and working…
(more)
▼ This thesis deals with heat cycles for waste heat utilization and their comparison. The first part describes particular heat cycles, their basic modifications and working principle, their advantages and disadvantages and typical applications. The second part is dedicated to technical parameters and creating of idealized models of those cycles on the basis of gained data. The comparison of the cycles is also done.
Advisors/Committee Members: Jedelský, Jan (advisor), Lízal, František (referee).
Subjects/Keywords: Stirlingův cyklus; organický Rankinův cyklus; Braytonův cyklus; Kalinův cyklus; odpadní teplo; tepelný oběh.; Stirling cycle; organic Rankine cycle; Brayton cycle; Kalina cycle; waste heat; heat cycle.
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APA ·
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APA (6th Edition):
Macháček, P. (2019). Tepelné motory pro využívání odpadního tepla: Heat engines for waste heat utilization. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/3174
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Macháček, Pavel. “Tepelné motory pro využívání odpadního tepla: Heat engines for waste heat utilization.” 2019. Thesis, Brno University of Technology. Accessed March 05, 2021.
http://hdl.handle.net/11012/3174.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Macháček, Pavel. “Tepelné motory pro využívání odpadního tepla: Heat engines for waste heat utilization.” 2019. Web. 05 Mar 2021.
Vancouver:
Macháček P. Tepelné motory pro využívání odpadního tepla: Heat engines for waste heat utilization. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/11012/3174.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Macháček P. Tepelné motory pro využívání odpadního tepla: Heat engines for waste heat utilization. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/3174
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Indian Institute of Science
27.
Harith, Akila.
Thermodynamic Analysis And Simulation Of A Solar Thermal Power System.
Degree: MSc Engg, Faculty of Engineering, 2014, Indian Institute of Science
URL: http://etd.iisc.ac.in/handle/2005/2313
► Solar energy is a virtually inexhaustible energy resource, and thus, has great potential in helping meet many of our future energy requirements. Current technology used…
(more)
▼ Solar energy is a virtually inexhaustible energy resource, and thus, has great potential in helping meet many of our future energy requirements. Current technology used for solar energy conversion, however, is not cost effective. In addition, solar thermal power systems are also generally less efficient as compared to fossil fuel based thermal power plants. There is a large variety of systems for solar thermal power generation, each with certain advantages and disadvantages. A distinct advantage of solar thermal power generation systems is that they can be easily integrated with a storage system and/or with an auxiliary heating system (as in hybrid power systems) to provide stable and reliable power. Also, as the power block of a solar thermal plant resembles that of a conventional thermal power plant, most of the equipment and technology used is already well defined, and hence does not require major break through research for effective utilisation. Manufacturing of components, too, can be easily indigenized.
A solar collector field is generally used for solar thermal energy conversion. The field converts high grade radiation energy to low grade heat energy, which will inevitably involve energy losses as per the laws of thermodynamics. The 2nd law of thermodynamics requires that a certain amount of heat energy cannot be utilised and has to be rejected as waste heat. This limits the efficiency of solar thermal energy technology. However, in many situations, the waste heat can be effectively utilized to perform refrigeration and desalination using absorption or solid sorption systems, with technologies popularly known as “polygeneration”.
There is extensive research done in the area of solar collectors, including but not limiting to thermal analysis, testing of solar collectors, and economic analysis of solar collectors. Exergy and optimization analyses have also been done for certain solar collector configurations. Research on solar thermal power plants includes energy analysis at system level with certain configurations. Research containing analysis with insolation varying throughout the day is limited. Hence, there is scope for analysis incorporating diurnal variation of insolation for a solar thermal power system.
This thesis centres on the thermodynamic analysis at system level of a solar thermal power system using a concentrating solar collector field and a simple
Rankine cycle power generation (with steam as the working fluid) for Indian conditions. The aim is to develop a tool for thermodynamic analysis of solar thermal power systems, with a generalised approach that can also be used with different solar collector types, different heat transfer fluids in the primary loop, and also different working fluids in the secondary loop.
This analysis emphasises the solar collector field and a basic sensible heat storage system, and investigates the various energy and exergy losses present. Comparisons have been made with and without a storage unit and resulting performance issues of solar thermal power plants have…
Advisors/Committee Members: Dutta, Pradip (advisor).
Subjects/Keywords: Solar Thermal Power System; Solar Collectors; Solar Thermal Energy Conversion; Rankine Cycle Power Generation; Solar Thermal Power System - Thermodynamic Analysis; Solar Energy; Solar Thermal Power; Solar Thermal Power Plant; Rankine Cycle System; Organic Rankine Cycle (ORC); Heat Engineering
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APA (6th Edition):
Harith, A. (2014). Thermodynamic Analysis And Simulation Of A Solar Thermal Power System. (Masters Thesis). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/2313
Chicago Manual of Style (16th Edition):
Harith, Akila. “Thermodynamic Analysis And Simulation Of A Solar Thermal Power System.” 2014. Masters Thesis, Indian Institute of Science. Accessed March 05, 2021.
http://etd.iisc.ac.in/handle/2005/2313.
MLA Handbook (7th Edition):
Harith, Akila. “Thermodynamic Analysis And Simulation Of A Solar Thermal Power System.” 2014. Web. 05 Mar 2021.
Vancouver:
Harith A. Thermodynamic Analysis And Simulation Of A Solar Thermal Power System. [Internet] [Masters thesis]. Indian Institute of Science; 2014. [cited 2021 Mar 05].
Available from: http://etd.iisc.ac.in/handle/2005/2313.
Council of Science Editors:
Harith A. Thermodynamic Analysis And Simulation Of A Solar Thermal Power System. [Masters Thesis]. Indian Institute of Science; 2014. Available from: http://etd.iisc.ac.in/handle/2005/2313
Universidade do Minho
28.
Teixeira, Hugo André Oliveira.
Avaliação de sistemas ORC (Organic Rankine Cycle) para aproveitamento de calor dos gases de escape de um automóvel
.
Degree: 2015, Universidade do Minho
URL: http://hdl.handle.net/1822/41872
► O consumo de combustíveis fósseis continua a aumentar, o que causa muitos problemas de sustentabilidade, levando ao aumento do interesse da redução da sua dependência.…
(more)
▼ O consumo de combustíveis fósseis continua a aumentar, o que causa muitos problemas de sustentabilidade, levando ao aumento do interesse da redução da sua dependência. Além disso, as exigentes normas da União Europeia levam ao impulsionamento e desenvolvimento tecnológico da área automóvel, principalmente, na melhoria da sua eficiência energética e redução de emissões.
O presente trabalho avalia o potencial de aproveitamento do calor residual dos gases de escape de um automóvel para produção de eletricidade, considerando três configurações de ciclos de
Rankine, nomeadamente, o ciclo de
Rankine simples, o ciclo de
Rankine com sobreaquecedor e o ciclo de
Rankine com recuperador. Para tal, foram desenvolvidos os modelos numéricos para a análise termodinâmica das três configurações de ciclo, utilizando os resultados experimentais de um automóvel equipado com um motor de combustão interna de ignição por faísca. Além disso, foi estudado a utilização de um permutador de calor de tubos e camisa. Para a análise termodinâmica foram considerados como fluidos de trabalho a água e os fluidos orgânicos benzeno, R123, R134a, R141b, R236ea, R245fa, R600 e R601.
O ciclo de
Rankine demonstrou ser a configuração mais adequada para recuperação térmica dos gases de escape de um automóvel. Também se demonstrou que a utilização da água é mais benéfica do que os fluidos orgânicos. Contudo, é necessário o seu sobreaquecimento de modo a realizar-se uma expansão seca. Considerando o ciclo de
Rankine e permuta de calor ideal, os resultados obtidos revelam, à pressão de vaporização de 25bar, um rendimento termodinâmico do sistema para os fluidos R141b e água, respetivamente, de 13% e 15%. Além disso, a energia produzida pela turbina apresenta-se na gama de 1,4kW a 4,4kW. O sobreaquecimento da água de 238ºC, à pressão de vaporização de 25bar, apresenta cerca de 23,7% de rendimento termodinâmico do sistema e uma gama de produção de energia entre 2kW e 2,6kW.
Os resultados obtidos confirmam a vantagem na recuperação térmica dos gases de escape para produção de energia elétrica através da aplicação de um sistema de ciclo de
Rankine.
Advisors/Committee Members: Martins, Luís Barreiros (advisor), Brito, Francisco Carrusca Pimenta (advisor).
Subjects/Keywords: Aproveitamento de calor residual de um automóvel;
Tecnologia ORC;
Ciclo Orgânico de Rankine;
Fluido de Trabalho;
Waste heat recovery of a vehicle;
ORC Technology;
Organic Rankine Cycle;
Working Fluid
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APA (6th Edition):
Teixeira, H. A. O. (2015). Avaliação de sistemas ORC (Organic Rankine Cycle) para aproveitamento de calor dos gases de escape de um automóvel
. (Masters Thesis). Universidade do Minho. Retrieved from http://hdl.handle.net/1822/41872
Chicago Manual of Style (16th Edition):
Teixeira, Hugo André Oliveira. “Avaliação de sistemas ORC (Organic Rankine Cycle) para aproveitamento de calor dos gases de escape de um automóvel
.” 2015. Masters Thesis, Universidade do Minho. Accessed March 05, 2021.
http://hdl.handle.net/1822/41872.
MLA Handbook (7th Edition):
Teixeira, Hugo André Oliveira. “Avaliação de sistemas ORC (Organic Rankine Cycle) para aproveitamento de calor dos gases de escape de um automóvel
.” 2015. Web. 05 Mar 2021.
Vancouver:
Teixeira HAO. Avaliação de sistemas ORC (Organic Rankine Cycle) para aproveitamento de calor dos gases de escape de um automóvel
. [Internet] [Masters thesis]. Universidade do Minho; 2015. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1822/41872.
Council of Science Editors:
Teixeira HAO. Avaliação de sistemas ORC (Organic Rankine Cycle) para aproveitamento de calor dos gases de escape de um automóvel
. [Masters Thesis]. Universidade do Minho; 2015. Available from: http://hdl.handle.net/1822/41872
29.
Unzueta, Rodrigo Bernardello.
Estudo teórico e experimental de uma máquina a vapor alternativa.
Degree: Mestrado, Engenharia Mecânica de Energia de Fluidos, 2014, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/3/3150/tde-29122014-114347/
;
► Este trabalho apresenta uma revisão dos ciclos teóricos estudados por outros autores sobre o funcionamento de uma máquina a vapor funcionando como máquina de expansão…
(more)
▼ Este trabalho apresenta uma revisão dos ciclos teóricos estudados por outros autores sobre o funcionamento de uma máquina a vapor funcionando como máquina de expansão e propõe um ciclo generalizado para o estudo. Esse ciclo generalizado é equacionado e seus pontos operacionais de otimização são determinados. Ao estudar os ciclos teóricos, verificou-se que a máquina a vapor pode atingir a eficiência isentrópica igual de 100%. Um estudo experimental foi conduzido em uma máquina a vapor, a fim de verificar os fenômenos que ocorrem e que influenciam na sua eficiência, fazendo o funcionamento real se afastar do ciclo teórico. Ao fazer o estudo experimental, verificou-se que a máquina a vapor real utilizada possui baixa eficiência, atingindo um máximo de 10% de eficiência isentrópica. Essa eficiência não é do ciclo e sim do conjunto todo, e é devido a diversos fatores, como, por exemplo, atritos, problemas de lubrificação, imperfeições físicas que provocam o vazamento do fluido de trabalho. Uma simulação computacional é realizada, visando prever o comportamento real da máquina a vapor e comparar com os dados obtidos experimentalmente. Verificando assim se a simulação consegue prever os fenômenos físicos e auxiliar no projeto de uma máquina a vapor. Após analisar os dados simulados, verificou-se que as válvulas possuem grande influência na eficiência isentrópica do ciclo da máquina a vapor. Válvulas de acionamento rápido preveem uma eficiência que pode chegar a 96%, enquanto as válvulas reais provocam uma eficiência de aproximadamente 60% para as mesmas condições de simulação. Uma das principais diferenças entre a simulação e os dados reais é a restrição ao fluxo provocada pelas válvulas, e que exigem coeficientes de descarga específicos para esse tipo de válvula.
This work reviews the theoretical cycles studied by other authors on the operation of a steam engine as an expansion machine and chooses a generalized cycle for the study. This generalized cycle is modeled and the points of optimization are determined. By studying the theoretical cycles, it was found that the steam engine can reach the isentropic efficiency equal to 100%. An experimental study carried out in a steam engine in order to verify the phenomena occurring that influence their effectiveness, moving the actual operation away from the theoretical cycle. By making the experimental study, it was found that the actual steam engine has a low efficiency, reaching a maximum 10% isentropic efficiency. This efficiency is not of the cycle, but of the whole set, and is due to several factors, such as friction problems, lubrication problems, physical imperfections causing leakage of the working fluid. A computer simulation was performed in order to predict the actual behavior of the steam engine and compare with the experimental data. After analyzing the simulated data, it was found that the valves have a great influence on the isentropic efficiency of the steam cycle. Valves operating instantly can reach 96% of isentropic efficiency, while real valves cause an…
Advisors/Committee Members: Simões-Moreira, José Roberto.
Subjects/Keywords: Ciclo orgânico de Rankine; Ciclos motores; Máquinas a vapor; Motores a vapor; Organic Rankine cycle; Simulação; Simulation; Steam engine; Steam machine; Workscycles
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Record Details
Similar Records
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APA ·
Chicago ·
MLA ·
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CSE |
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APA (6th Edition):
Unzueta, R. B. (2014). Estudo teórico e experimental de uma máquina a vapor alternativa. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/3/3150/tde-29122014-114347/ ;
Chicago Manual of Style (16th Edition):
Unzueta, Rodrigo Bernardello. “Estudo teórico e experimental de uma máquina a vapor alternativa.” 2014. Masters Thesis, University of São Paulo. Accessed March 05, 2021.
http://www.teses.usp.br/teses/disponiveis/3/3150/tde-29122014-114347/ ;.
MLA Handbook (7th Edition):
Unzueta, Rodrigo Bernardello. “Estudo teórico e experimental de uma máquina a vapor alternativa.” 2014. Web. 05 Mar 2021.
Vancouver:
Unzueta RB. Estudo teórico e experimental de uma máquina a vapor alternativa. [Internet] [Masters thesis]. University of São Paulo; 2014. [cited 2021 Mar 05].
Available from: http://www.teses.usp.br/teses/disponiveis/3/3150/tde-29122014-114347/ ;.
Council of Science Editors:
Unzueta RB. Estudo teórico e experimental de uma máquina a vapor alternativa. [Masters Thesis]. University of São Paulo; 2014. Available from: http://www.teses.usp.br/teses/disponiveis/3/3150/tde-29122014-114347/ ;
30.
Pallis, Platon.
Experimental investigation and economic assessment of a fully automated organic Rankine cycle for waste heat recovery from marine engine jacket cooling water.
Degree: 2020, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)
URL: http://hdl.handle.net/10442/hedi/47576
► The PhD thesis focused on the recovery of heat from the internal combustion marine engines and more specifically from their jacket water cooling circuit. This…
(more)
▼ The PhD thesis focused on the recovery of heat from the internal combustion marine engines and more specifically from their jacket water cooling circuit. This research focused on the construction, experimental evaluation and full automation of an Organic Rankine Cycle (ORC) waste heat recovery (WHR) system, specially designed for the jacket water of a marine diesel engine.
Η διδακτορική διατριβή επικεντρώθηκε στην αξιοποίηση της απορριπτόμενης θερμότητας κινητήρων εσωτερικής καύσης και πιο συγκεκριμένα από το κύκλωμα νερού ψύξης του χιτωνίου. Στα πλαίσια της πραγματοποιήθηκε η κατασκευή, η πειραματική αξιολόγηση, διερεύνηση και η πλήρη αυτοματοποίηση ενός συστήματος αξιοποίησης απορριπτόμενης θερμότητας για παραγωγή ηλεκτρικής ενέργειας με τη χρήση οργανικού κύκλου Rankine, ειδικά σχεδιασμένο για το κύκλωμα ψύξης του χιτωνίου ενός ναυτικού πετρελαιοκινητήρα.
Subjects/Keywords: Οργανικός κύκλος rankine; Αξιοποίηση απορριπτόμενης θερμότητας; Χιτώνιο ψύξης; Ναυτικός κινητήρας; Πειραματική διερεύνηση; Organic rankine cycle; Waste heat recovery; Jacket cooling; Marine engines; Experimental investigation
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Pallis, P. (2020). Experimental investigation and economic assessment of a fully automated organic Rankine cycle for waste heat recovery from marine engine jacket cooling water. (Thesis). National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Retrieved from http://hdl.handle.net/10442/hedi/47576
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Pallis, Platon. “Experimental investigation and economic assessment of a fully automated organic Rankine cycle for waste heat recovery from marine engine jacket cooling water.” 2020. Thesis, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Accessed March 05, 2021.
http://hdl.handle.net/10442/hedi/47576.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Pallis, Platon. “Experimental investigation and economic assessment of a fully automated organic Rankine cycle for waste heat recovery from marine engine jacket cooling water.” 2020. Web. 05 Mar 2021.
Vancouver:
Pallis P. Experimental investigation and economic assessment of a fully automated organic Rankine cycle for waste heat recovery from marine engine jacket cooling water. [Internet] [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2020. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10442/hedi/47576.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Pallis P. Experimental investigation and economic assessment of a fully automated organic Rankine cycle for waste heat recovery from marine engine jacket cooling water. [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2020. Available from: http://hdl.handle.net/10442/hedi/47576
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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