subject:(thermal efficiency)

University of Miami

1. Samarajeewa, Hasitha. Design of 1.6 Liter Genset Engine.

Degree: MS, Mechanical Engineering (Engineering), 2011, University of Miami

URL: https://scholarlyrepository.miami.edu/oa_theses/277

► Generators are widely used across the world as portable power units in case of power outages, used for emergency services and are also used in… (more)

Subjects/Keywords: genset; generator; efficiency; brake thermal efficiency

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APA (6^th Edition):

Samarajeewa, H. (2011). Design of 1.6 Liter Genset Engine. (Thesis). University of Miami. Retrieved from https://scholarlyrepository.miami.edu/oa_theses/277

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Samarajeewa, Hasitha. “Design of 1.6 Liter Genset Engine.” 2011. Thesis, University of Miami. Accessed February 27, 2021. https://scholarlyrepository.miami.edu/oa_theses/277.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Samarajeewa, Hasitha. “Design of 1.6 Liter Genset Engine.” 2011. Web. 27 Feb 2021.

Vancouver:

Samarajeewa H. Design of 1.6 Liter Genset Engine. [Internet] [Thesis]. University of Miami; 2011. [cited 2021 Feb 27]. Available from: https://scholarlyrepository.miami.edu/oa_theses/277.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Samarajeewa H. Design of 1.6 Liter Genset Engine. [Thesis]. University of Miami; 2011. Available from: https://scholarlyrepository.miami.edu/oa_theses/277

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

2. Abalkheil, Fahad. Developing an adaptive thermal comfort model for passenger terminal buildings situated in hot climates.

Degree: 2020, University College Dublin. School of Architecture, Planning and Environmental Policy

URL: http://hdl.handle.net/10197/11649

► This study evaluates the use of international thermal comfort standards currently being used in the south terminal of the King Abdulaziz International Airport (KAIA). The… (more)

▼ This study evaluates the use of international thermal comfort standards currently being used in the south terminal of the King Abdulaziz International Airport (KAIA). The airport is located in Jeddah, in the Kingdom of Saudi Arabia (KSA). The study was prompted by the hypothesis that the hot climate experienced in KSA, the acclimatization of those in the region, coupled with the widespread wearing of traditional clothing, justifies a unique model of thermal comfort. The south terminal of KAIA currently uses set points of 20-24 °C (ASHRAE-based comfort model). Most international thermal comfort standards are based on experiments that were conducted in moderate climates. These studies have two particular shortcomings in the context of those living in hot climates: they fail to consider that people in other climatic regions could have different thermal expectations and preferences, and many disregard the role of outdoor temperature on thermal comfort. The international standards prescribe temperature set points that are often too low for people who live in extremely hot and humid climates. Keeping the temperature at the international set point requires excessive amounts of energy and is wasteful and expensive. Public policy demands that the thermal control strategies in public buildings be evaluated to ensure that they are operating efficiently. Airports are of particular concern because they have HVAC systems that consume a disproportionate amount of energy relative to their size. This study, based on passenger surveys and energy simulation, considers the effectiveness of developing a model of thermal comfort as an alternative control strategy for the KAIA terminal and assesses its energy impact. In order to determine new temperature set points that might better serve the needs of the passengers and maximize energy efficiency in KAIA, this study: a) Conducted detailed surveys of passengers in the airport terminal; b) Obtained measurements of both physical and personal variables; c) Recorded behavior patterns of passengers; d) Collected all relevant data on the conditions inside and out of the terminal; e) Considered the impact that traditional garments may have on thermal comfort; f) Used the data from the surveys to create a new model of thermal comfort; g) Used computer simulation programs to test and compare a developed thermal comfort model with the set point currently used in the building. The results of the survey demonstrate the unsuitability of the ASHRAE-based comfort model (set temperatures of 20-24 °C) currently used in the airport. The data from the survey is used to derive new models of thermal comfort using regression analysis. Computer simulation demonstrated that the new set comfort temperatures obtained from created models could significantly increase the operational efficiency of the terminal. Implementing these models would also reduce the operating cost of the KAIA, lower the CO2 emissions and improve the comfort of passengers. More particularly, the results of the research demonstrate the…

Subjects/Keywords: Energy efficiency; Thermal comfort; Adaptive thermal comfort

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APA (6^th Edition):

Abalkheil, F. (2020). Developing an adaptive thermal comfort model for passenger terminal buildings situated in hot climates. (Thesis). University College Dublin. School of Architecture, Planning and Environmental Policy. Retrieved from http://hdl.handle.net/10197/11649

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Abalkheil, Fahad. “Developing an adaptive thermal comfort model for passenger terminal buildings situated in hot climates.” 2020. Thesis, University College Dublin. School of Architecture, Planning and Environmental Policy. Accessed February 27, 2021. http://hdl.handle.net/10197/11649.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Abalkheil, Fahad. “Developing an adaptive thermal comfort model for passenger terminal buildings situated in hot climates.” 2020. Web. 27 Feb 2021.

Vancouver:

Abalkheil F. Developing an adaptive thermal comfort model for passenger terminal buildings situated in hot climates. [Internet] [Thesis]. University College Dublin. School of Architecture, Planning and Environmental Policy; 2020. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10197/11649.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Abalkheil F. Developing an adaptive thermal comfort model for passenger terminal buildings situated in hot climates. [Thesis]. University College Dublin. School of Architecture, Planning and Environmental Policy; 2020. Available from: http://hdl.handle.net/10197/11649

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

3. Zhou, Jun. Comparing Aluminum Composite Sheeting to Fibre Panel for Thermal Performance in Residential Housing.

Degree: MS, Construction Management, 2016, Texas A&M University

URL: http://hdl.handle.net/1969.1/187404

► In the United States, the building industry is one of the main consumers of energy and materials such as concrete and walling systems. Exterior wall… (more)

Subjects/Keywords: thermal performance; energy efficiency

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APA (6^th Edition):

Zhou, J. (2016). Comparing Aluminum Composite Sheeting to Fibre Panel for Thermal Performance in Residential Housing. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/187404

Chicago Manual of Style (16^th Edition):

Zhou, Jun. “Comparing Aluminum Composite Sheeting to Fibre Panel for Thermal Performance in Residential Housing.” 2016. Masters Thesis, Texas A&M University. Accessed February 27, 2021. http://hdl.handle.net/1969.1/187404.

MLA Handbook (7^th Edition):

Zhou, Jun. “Comparing Aluminum Composite Sheeting to Fibre Panel for Thermal Performance in Residential Housing.” 2016. Web. 27 Feb 2021.

Vancouver:

Zhou J. Comparing Aluminum Composite Sheeting to Fibre Panel for Thermal Performance in Residential Housing. [Internet] [Masters thesis]. Texas A&M University; 2016. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/1969.1/187404.

Council of Science Editors:

Zhou J. Comparing Aluminum Composite Sheeting to Fibre Panel for Thermal Performance in Residential Housing. [Masters Thesis]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/187404

NSYSU

4. Chiang, Ru-hsien. Studies and Fabrications of Cholesteric Liquid Crystal Gratings.

Degree: PhD, Physics, 2014, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0616113-161122

► This thesis demonstrates two tunable gratings based on cholesteric liquid crystals (CLCs). The first one is the thermally rotatable grating with hybrid-aligned (HBA) structures. Experiments… (more)

Subjects/Keywords: grating; thermal effect; diffraction efficiency; cholesteric; stripe

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APA (6^th Edition):

Chiang, R. (2014). Studies and Fabrications of Cholesteric Liquid Crystal Gratings. (Doctoral Dissertation). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0616113-161122

Chicago Manual of Style (16^th Edition):

Chiang, Ru-hsien. “Studies and Fabrications of Cholesteric Liquid Crystal Gratings.” 2014. Doctoral Dissertation, NSYSU. Accessed February 27, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0616113-161122.

MLA Handbook (7^th Edition):

Chiang, Ru-hsien. “Studies and Fabrications of Cholesteric Liquid Crystal Gratings.” 2014. Web. 27 Feb 2021.

Vancouver:

Chiang R. Studies and Fabrications of Cholesteric Liquid Crystal Gratings. [Internet] [Doctoral dissertation]. NSYSU; 2014. [cited 2021 Feb 27]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0616113-161122.

Council of Science Editors:

Chiang R. Studies and Fabrications of Cholesteric Liquid Crystal Gratings. [Doctoral Dissertation]. NSYSU; 2014. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0616113-161122

5. Reis, Rui Miguel da Costa. Análise do desempenho térmico de construções: projeto e soluções alternativas.

Degree: 2013, Instituto Politécnico do Porto

URL: https://www.rcaap.pt/detail.jsp?id=oai:recipp.ipp.pt:10400.22/6510

►

O presente Relatório de Estágio representa o último passo para a obtenção do Grau de Mestre em Engenharia Civil – Ramo de Construções, lecionado no… (more)

▼

O presente Relatório de Estágio representa o último passo para a obtenção do Grau de Mestre em Engenharia Civil – Ramo de Construções, lecionado no Instituto Superior de Engenharia do Porto (ISEP). Este relatório refere-se ao trabalho desenvolvido em estágio na entidade acolhedora Concexec – Arquitetura, Lda., através da elaboração e desenvolvimento dos projetos de térmica de edifícios referentes a duas moradias unifamiliares. Os referidos projetos foram elaborados em colaboração com a entidade patronal do estágio, precedidos de visitas aos locais das respetivas obras e análise dos respetivos projetos de especialidades considerados relevantes. Numa primeira parte do relatório está descrita a realidade da situação energética atual em Portugal, sucedida da referência e descrição de soluções construtivas disponíveis no mercado nacional que visam a melhoria da eficiência energética em edifícios de habitação. Numa segunda parte do relatório encontram-se descritos, de uma forma detalhada, os projetos de térmica de edifícios referidos e respetivas soluções alternativas, sucedidos de uma análise energética e económica que permita deduzir qual a melhor solução a ser aplicada mediante o caso. Os resultados obtidos cumpriram com todos os requisitos regulamentares estabelecidos, permitindo obter conclusões adequadas ao âmbito do presente Relatório de Estágio, cumprindo, desta forma, os objetivos que lhe foram estabelecidos. No final estão descritas as conclusões que foram obtidas durante todo o processo de pesquisa e desenvolvimento do estágio realizado.

This Internship Report represents the final step to obtain the Degree of Master of Civil Engineering – Construction Branch, taught at Instituto Superior de Engenharia do Porto (ISEP). This report refers to the work made in intership at the host entity Concexec – Arquitetura, Lda., through the elaboration and development of thermal projects for buildings to two residential buildings. These projects were developed in collaboration with the employer of the internship, preceded by visits to their respective construction sites and analysis of their respective specialties projects considered relevant. In the first part of the report is described the reality of the current energy status in Portugal, succeeded by the reference and description of constructive solutions available in the national market which aim to improve the energy efficiency in residential buildings. In the second part of the report is described, in a detailed manner, the aforementioned thermal projects for buildings and respective alternative solutions, succeeded by an economical and energetic analysis which permits to deduce the best solution to be applied by the case. The results complied with all the set regulatory requirements, allowing to obtain appropriate conclusions on the scope of the current Internship Report and fulfilling thus the goals that have been established. In the end, it is described the conclusions that were obtained throughout the research and development process of the internship.

Advisors/Committee Members: Silva, Teresa Isabel Moreira de Carvalho Amorim Neto.

Subjects/Keywords: Térmica; Eficiência; Energia; Thermal; Efficiency; Energy

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Reis, R. M. d. C. (2013). Análise do desempenho térmico de construções: projeto e soluções alternativas. (Thesis). Instituto Politécnico do Porto. Retrieved from https://www.rcaap.pt/detail.jsp?id=oai:recipp.ipp.pt:10400.22/6510

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Reis, Rui Miguel da Costa. “Análise do desempenho térmico de construções: projeto e soluções alternativas.” 2013. Thesis, Instituto Politécnico do Porto. Accessed February 27, 2021. https://www.rcaap.pt/detail.jsp?id=oai:recipp.ipp.pt:10400.22/6510.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Reis, Rui Miguel da Costa. “Análise do desempenho térmico de construções: projeto e soluções alternativas.” 2013. Web. 27 Feb 2021.

Vancouver:

Reis RMdC. Análise do desempenho térmico de construções: projeto e soluções alternativas. [Internet] [Thesis]. Instituto Politécnico do Porto; 2013. [cited 2021 Feb 27]. Available from: https://www.rcaap.pt/detail.jsp?id=oai:recipp.ipp.pt:10400.22/6510.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Reis RMdC. Análise do desempenho térmico de construções: projeto e soluções alternativas. [Thesis]. Instituto Politécnico do Porto; 2013. Available from: https://www.rcaap.pt/detail.jsp?id=oai:recipp.ipp.pt:10400.22/6510

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Newcastle

6. Rawson, Anthony Joseph. Modelling and application of advanced thermal storage materials.

Degree: PhD, 2016, University of Newcastle

URL: http://hdl.handle.net/1959.13/1317504

►

Research Doctorate - Doctor of Philosophy (PhD)

Instantaneous availability of power is taken for granted in much of the developed world. Provided a fuel source… (more)

▼

Research Doctorate - Doctor of Philosophy (PhD)

Instantaneous availability of power is taken for granted in much of the developed world. Provided a fuel source is unlimited and readily available, the expectation of instant power is readily fulfilled with available technology. However, it is now accepted that human kind’s most utilised fuels (coal, oil and natural gas) are in fact diminishing and their availability cannot be guaranteed as demand outstrips supply. Not only supply limitations exist, the burning of these fuels contributes heavily to dangerous climate change. Thus technology needs to be developed to efficiently utilise fuels intermittently or take advantage of other energy sources which may also be intermittent. Thermal energy storage devices store heat energy through sensible heating, a phase change or a combination of the two. A device can be coupled to a power cycle to provide thermal inertia to the system. Power cycles that generate electricity from an intermittent heat source are an obvious application. Applications also exist in industrial processes requiring continuous heat for drying or a chemical reaction and control of air temperature in sensitive environments. Many thermal energy storage devices exist, tailored to particular temperature ranges and storage capacities. This thesis introduces the Miscibility Gap Alloy as a potential thermal storage technology. Miscibility Gap Alloys overcome a number of the shortcomings of molten salt, paraffin and sensible storage media but their properties are not yet well communicated. Material properties, lifetime estimates, economic characteristics and implementations of Miscibility Gap Alloys are discussed in this dissertation. Through analysis of these aspects a number of novel methodologies, theories and devices were developed. The Lattice Monte Carlo method was successfully employed to model effective conductivity of binary composites. The results of these analyses and existing homogenisation models were generalised for volume fraction and constituent conductivity ratio through a novel concept titled ‘microstructural efficiency’. This work enabled the effective thermal conductivity (and indeed any 2^nd rank tensor property obeying Fick’s Law) to be estimated with great accuracy for a number of idealised and common morphologies with generality in volume fraction and conductivity ratio of constituents. Best practice manufacturing methods for different Miscibility Gap Alloys were identified through experiment and presented. This led to knowledge of the morphology of the materials (including potential porosity). From this, good estimates were made of all material properties relevant to the alloys use as thermal storage. The hypothesised material property advantages of Miscibility Gap Alloys are thus confirmed and compared with the existing state of the art. A discussion of the long term behaviour of Miscibility Gap Alloys follows. Consideration is given to diffusion as well as mechanical and chemical dominated aging mechanisms. It was found that…

Advisors/Committee Members: University of Newcastle. Faculty of Engineering & Built Environment, School of Engineering.

Subjects/Keywords: miscibility gap alloy; thermal storage; microstructural efficiency

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APA (6^th Edition):

Rawson, A. J. (2016). Modelling and application of advanced thermal storage materials. (Doctoral Dissertation). University of Newcastle. Retrieved from http://hdl.handle.net/1959.13/1317504

Chicago Manual of Style (16^th Edition):

Rawson, Anthony Joseph. “Modelling and application of advanced thermal storage materials.” 2016. Doctoral Dissertation, University of Newcastle. Accessed February 27, 2021. http://hdl.handle.net/1959.13/1317504.

MLA Handbook (7^th Edition):

Rawson, Anthony Joseph. “Modelling and application of advanced thermal storage materials.” 2016. Web. 27 Feb 2021.

Vancouver:

Rawson AJ. Modelling and application of advanced thermal storage materials. [Internet] [Doctoral dissertation]. University of Newcastle; 2016. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/1959.13/1317504.

Council of Science Editors:

Rawson AJ. Modelling and application of advanced thermal storage materials. [Doctoral Dissertation]. University of Newcastle; 2016. Available from: http://hdl.handle.net/1959.13/1317504

Addis Ababa University

7. Abdulehak, Alemu. DESIGN OF FLUIDIZED BED BAGASSE GASIFIER .

Degree: 2013, Addis Ababa University

URL: http://etd.aau.edu.et/dspace/handle/123456789/5059

► With increasing demand of energy and global issue of sustainable energy resource of the world, energy from Biomass is attracting the attention of many researchers… (more)

▼ With increasing demand of energy and global issue of sustainable energy resource of the world, energy from Biomass is attracting the attention of many researchers as a source of energy in the world. Currently in Ethiopia about nine new sugar factories are being installed requiring adequate amount of electrification and energy. The demand of these industries can be met from different sources of energy. Gasification can be considered one of these sources. In this work an attempt has been made to develop a procedure for designing a fluidized bed reactor that can handle bagasse as a feedstock. By using an appropriate design procedure a complete design of a gasification reactor was studied deeply. The design procedure followed in this thesis is presented in Appendix III. The design work has been categorized into three different parts. The first one deals with the equilibrium modelling of the fluidized bed to determine the output gas composition. The equilibrium model is analyzed with the help of a matlab code giving the volumetric/ molar composition of the product gas. The higher heating value (HHV) found is 2.69 MJ/kg with the moisture content of 15%. A thermal efficiency of 50.78% was obtained which would have reached about 80% if the sensible heat of the product gas was put under consideration. The second part of this design work aims at determining the appropriate fluidization parameter of the reactor since efficient fluidization is required for effective reaction and maximum output efficiency. Parameters like the minimum fluidization velocity, the terminal fall velocity, the operational velocities and the bed and freeboard geometries have been determined. The third part of this design work investigates the dimension of the reactor, its insulation and the openings of the shell and other components of the reactor. The reactor has a 4.2 m outside diameter by 11.3 m height. Finally an economic analysis was done on the cost of the gasifier which compares natural gas use as an energy source. The configurations of the reactor and the distributor of the reactor are also the core focus of the design work. Advisors/Committee Members: Dr. Ing. Demiss Alemu (advisor).

Subjects/Keywords: Biomass; gasification; producer gas; Thermal efficiency

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APA (6^th Edition):

Abdulehak, A. (2013). DESIGN OF FLUIDIZED BED BAGASSE GASIFIER . (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/5059

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Abdulehak, Alemu. “DESIGN OF FLUIDIZED BED BAGASSE GASIFIER .” 2013. Thesis, Addis Ababa University. Accessed February 27, 2021. http://etd.aau.edu.et/dspace/handle/123456789/5059.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Abdulehak, Alemu. “DESIGN OF FLUIDIZED BED BAGASSE GASIFIER .” 2013. Web. 27 Feb 2021.

Vancouver:

Abdulehak A. DESIGN OF FLUIDIZED BED BAGASSE GASIFIER . [Internet] [Thesis]. Addis Ababa University; 2013. [cited 2021 Feb 27]. Available from: http://etd.aau.edu.et/dspace/handle/123456789/5059.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Abdulehak A. DESIGN OF FLUIDIZED BED BAGASSE GASIFIER . [Thesis]. Addis Ababa University; 2013. Available from: http://etd.aau.edu.et/dspace/handle/123456789/5059

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Delft University of Technology

8. Stylianou, S. (author). Thermal Simulation of Low Concentration PV/Thermal System using a Computational Fluid Dynamics Software.

Degree: 2016, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:0da53df4-df77-4afd-9bc0-89ccca593719

►

Cogenra company has created a low concentration PV/Thermal system that produces both thermal energy and electricity simultaneously, mainly for commercial and industrial applications. The realization… (more)

▼

Cogenra company has created a low concentration PV/Thermal system that produces both thermal energy and electricity simultaneously, mainly for commercial and industrial applications. The realization of a system that combines photovoltaic modules, solar thermal collectors and concentrating mirrors makes it a complicated system to study. So far, only simple studies have been made on Cogenra’s LCPVT system including a 2-dimensional model. In this project, the possibility of using a Computational Fluid Dynamics software for analysing the low concentration PV/Thermal system of Cogenra has been studied. The CFD software Ansys Fluent has been used, in which a model was created in accordance to the Cogenra LCPVT system. After validating the results, the model has been used for analysing the system’s performance under various conditions in order to realize the system’s losses. Furthermore, due to the numerous components of the system, the analysis of the LCPVT system becomes a multi-variable problem. For this reason, three main parameters (mass flow rate, optical concentration, PV type) that affect the system’s performance has been chosen and studied in order to improve the system’s overall efficiency. Since the system has both electrical and thermal outputs, an equivalent efficiency was determined to express the two different efficiency terms. For the purpose of comparing the performance of the LCPVT system with the traditional photovoltaic modules, one other simple model was created in Ansys Fluent. This model has also been simulated under the same conditions as the Cogenra system in order to observe the difference in output between the LCPVT system and the photovoltaic modules. The low concentration PV/Thermal system has also been compared with other solar thermal systems such as a PV/Thermal system, a Concentrated Thermal system and a simple Solar Thermal System.

Applied Sciences

Electrical Sustainable Energy

Sustainable Energy Technologies

Advisors/Committee Members: Smets, A.H.M. (mentor).

Subjects/Keywords: CPVT; CFD; thermal; electrical; efficiency; concentration; simulation

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APA (6^th Edition):

Stylianou, S. (. (2016). Thermal Simulation of Low Concentration PV/Thermal System using a Computational Fluid Dynamics Software. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:0da53df4-df77-4afd-9bc0-89ccca593719

Chicago Manual of Style (16^th Edition):

Stylianou, S (author). “Thermal Simulation of Low Concentration PV/Thermal System using a Computational Fluid Dynamics Software.” 2016. Masters Thesis, Delft University of Technology. Accessed February 27, 2021. http://resolver.tudelft.nl/uuid:0da53df4-df77-4afd-9bc0-89ccca593719.

MLA Handbook (7^th Edition):

Stylianou, S (author). “Thermal Simulation of Low Concentration PV/Thermal System using a Computational Fluid Dynamics Software.” 2016. Web. 27 Feb 2021.

Vancouver:

Stylianou S(. Thermal Simulation of Low Concentration PV/Thermal System using a Computational Fluid Dynamics Software. [Internet] [Masters thesis]. Delft University of Technology; 2016. [cited 2021 Feb 27]. Available from: http://resolver.tudelft.nl/uuid:0da53df4-df77-4afd-9bc0-89ccca593719.

Council of Science Editors:

Stylianou S(. Thermal Simulation of Low Concentration PV/Thermal System using a Computational Fluid Dynamics Software. [Masters Thesis]. Delft University of Technology; 2016. Available from: http://resolver.tudelft.nl/uuid:0da53df4-df77-4afd-9bc0-89ccca593719

University of Ontario Institute of Technology

9. Sevinchan, Eren. Investigation of thermal management options for robots.

Degree: 2018, University of Ontario Institute of Technology

URL: http://hdl.handle.net/10155/959

► This thesis research studies the thermal challenges of robots and evaluates the potential thermal management options. In this regard, it aims to develop and analyze… (more)

Subjects/Keywords: Robots; Thermal management; Efficiency; Heating; Cooling

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APA (6^th Edition):

Sevinchan, E. (2018). Investigation of thermal management options for robots. (Thesis). University of Ontario Institute of Technology. Retrieved from http://hdl.handle.net/10155/959

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sevinchan, Eren. “Investigation of thermal management options for robots.” 2018. Thesis, University of Ontario Institute of Technology. Accessed February 27, 2021. http://hdl.handle.net/10155/959.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sevinchan, Eren. “Investigation of thermal management options for robots.” 2018. Web. 27 Feb 2021.

Vancouver:

Sevinchan E. Investigation of thermal management options for robots. [Internet] [Thesis]. University of Ontario Institute of Technology; 2018. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10155/959.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sevinchan E. Investigation of thermal management options for robots. [Thesis]. University of Ontario Institute of Technology; 2018. Available from: http://hdl.handle.net/10155/959

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Clemson University

10. O'Donnell, Ryan. Experimental and Analytical Techniques for Evaluating the Impact of Thermal Barrier Coatings on Low Temperature Combustion.

Degree: PhD, Automotive Engineering, 2018, Clemson University

URL: https://tigerprints.clemson.edu/all_dissertations/2200

► Homogeneous Charge Compression Ignition (HCCI), exhibits many fundamentally attractive thermodynamic characteristics. These traits, along with lean charge and low combustion temperatures, generally act to increase… (more)

▼ Homogeneous Charge Compression Ignition (HCCI), exhibits many fundamentally attractive thermodynamic characteristics. These traits, along with lean charge and low combustion temperatures, generally act to increase thermal efficiency relative to competing spark and/or compression ignition strategies. However, HCCI's extreme sensitivity to in-cylinder thermal conditions, place limits on practical implementation. Thus, at low temperatures, combustion remains incomplete limiting cycle efficiency while increasing emissions. In contrast, the introduction of thermal barrier coatings (TBCs) to in-cylinder surfaces has been shown to fundamentally alter gas-wall interactions. The work in this dissertation explores HCCI/TBC synergies. Both experimental and analytical pathways are explored, attempting to illuminate the impact(s) of coatings on engine heat transfer and combustion metrics. Efforts to correlate TBC thermophysical properties and surface phenomena with HCCI performance and emissions are also explored. Finally, methods are proposed to evaluate the TBC-gas interaction as it relates to thermal stratification of the in-cylinder charge. The present work seeks to identify, and eventually quantify HCCI/TBC synergies. A specific research effort is developed, attempting to illuminate the impact(s) of TBCs on fundamental HCCI combustion metrics. Efforts to correlate TBC thermophysical properties and surface phenomena with HCCI performance and emissions are also proposed. Analysis is enabled through complimentary analytic and experimental pathways - which includes specialized solution methodology and experimental hardware. Combined, these tools enable a more complete qualitative assessment of thermal barrier coating's impact on engine performance and emissions metrics, heat loss at the wall, and ultimately thermal stratification of the in-cylinder temperature field. Advisors/Committee Members: Dr. Zoran Filipi, Committee Chair, Dr. Mark Hoffman, Co-Chair, Dr. Richard Miller, Dr. Robert Prucka.

Subjects/Keywords: Combustion Efficiency; HCCI; Heat Transfer; Low Temperature Combustion; Thermal Barriers; Thermal Efficiency

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

O'Donnell, R. (2018). Experimental and Analytical Techniques for Evaluating the Impact of Thermal Barrier Coatings on Low Temperature Combustion. (Doctoral Dissertation). Clemson University. Retrieved from https://tigerprints.clemson.edu/all_dissertations/2200

Chicago Manual of Style (16^th Edition):

O'Donnell, Ryan. “Experimental and Analytical Techniques for Evaluating the Impact of Thermal Barrier Coatings on Low Temperature Combustion.” 2018. Doctoral Dissertation, Clemson University. Accessed February 27, 2021. https://tigerprints.clemson.edu/all_dissertations/2200.

MLA Handbook (7^th Edition):

O'Donnell, Ryan. “Experimental and Analytical Techniques for Evaluating the Impact of Thermal Barrier Coatings on Low Temperature Combustion.” 2018. Web. 27 Feb 2021.

Vancouver:

O'Donnell R. Experimental and Analytical Techniques for Evaluating the Impact of Thermal Barrier Coatings on Low Temperature Combustion. [Internet] [Doctoral dissertation]. Clemson University; 2018. [cited 2021 Feb 27]. Available from: https://tigerprints.clemson.edu/all_dissertations/2200.

Council of Science Editors:

O'Donnell R. Experimental and Analytical Techniques for Evaluating the Impact of Thermal Barrier Coatings on Low Temperature Combustion. [Doctoral Dissertation]. Clemson University; 2018. Available from: https://tigerprints.clemson.edu/all_dissertations/2200

Universiteit Utrecht

11. Heymans, E. Warmth use and thermal efficiency of remote dwellings: a Scotland case study.

Degree: 2015, Universiteit Utrecht

URL: http://dspace.library.uu.nl:8080/handle/1874/316223

► Previous research has shown that warmth demand in the UK has not gone down while thermal efficiency has gone up. Causes for this are disputed.… (more)

▼ Previous research has shown that warmth demand in the UK has not gone down while thermal efficiency has gone up. Causes for this are disputed. This research attempts to shed light on the relationship between thermal efficiency and warmth use. Additionally, researched was what implications warmth demand of dwellings in remote areas in particular may have on CO2 emissions, household expenditure and fuel poverty. The goal is to develop a method to measure domestic warmth use and thermal efficiency from inside temperature data and to find how various degrees of remoteness influence warmth demand for households and to analyze the implications on CO2 emissions, fuel poverty and vulnerability of households. This research uses inside temperature data reports derived from smart meters in order to identify areas of high warmth use and low thermal efficiency. Identifying these areas by means of improved monitoring may help tackle fuel poverty and decrease warmth demand. Smart meters reporting inside temperature data are uncommon types although the additional information on inside temperatures can add value for monitoring warmth demand, as this research proves. Monitors reporting the inside dwelling temperature at 5 minute intervals were used and proved able to estimate and analyze the warmth use factors heater activity, thermal efficiency, warmth use and comfort temperature in 369 dwellings in Eastern Scotland. The research shows that remote area dwellings tend to have higher warmth demand which is correlated with their lower thermal efficiency. In addition, energy sources used for fulfilling this demand tend to be more costly and CO2 emitting in rural dwellings than in urban areas. For further research it is proposed higher spatial and temporal resolution of outside temperature recordings could improve the accuracy with which the warmth use factors were measured, and that humidity, wind speed and wind direction should be taken into the equation in addition to outside temperature. Advisors/Committee Members: Voinov, Alexey.

Subjects/Keywords: smart meters; thermal efficiency; warmth use; thermal comfort; HVAC; fuel poverty

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Heymans, E. (2015). Warmth use and thermal efficiency of remote dwellings: a Scotland case study. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/316223

Chicago Manual of Style (16^th Edition):

Heymans, E. “Warmth use and thermal efficiency of remote dwellings: a Scotland case study.” 2015. Masters Thesis, Universiteit Utrecht. Accessed February 27, 2021. http://dspace.library.uu.nl:8080/handle/1874/316223.

MLA Handbook (7^th Edition):

Heymans, E. “Warmth use and thermal efficiency of remote dwellings: a Scotland case study.” 2015. Web. 27 Feb 2021.

Vancouver:

Heymans E. Warmth use and thermal efficiency of remote dwellings: a Scotland case study. [Internet] [Masters thesis]. Universiteit Utrecht; 2015. [cited 2021 Feb 27]. Available from: http://dspace.library.uu.nl:8080/handle/1874/316223.

Council of Science Editors:

Heymans E. Warmth use and thermal efficiency of remote dwellings: a Scotland case study. [Masters Thesis]. Universiteit Utrecht; 2015. Available from: http://dspace.library.uu.nl:8080/handle/1874/316223

Universidade do Rio Grande do Sul

12. Ancines, Crissiane Alves. Comparação entre o desempenho de um coletor híbrido térmico fotovoltaico com o de um coletor plano e um módulo fotovoltaico convencional.

Degree: 2016, Universidade do Rio Grande do Sul

URL: http://hdl.handle.net/10183/149352

►

Os aproveitamentos de energia solar em aplicações térmicas ou para a produção de energia elétrica são cada vez mais importantes, por se tratarem de fontes… (more)

▼

Os aproveitamentos de energia solar em aplicações térmicas ou para a produção de energia elétrica são cada vez mais importantes, por se tratarem de fontes de energia. Os estudos acerca dessas fontes estão se intensificando, a fim de melhorar seus desempenhos e suas aplicações para as condições atuais de desenvolvimento pelo mundo. Uma dessas tecnologias que utilizam como fonte a energia solar, desenvolvida nos últimos 30 anos, é o coletor híbrido térmico fotovoltaico. Esse coletor converte a energia proveniente da radiação solar em energia térmica e elétrica, simultaneamente, com a superposição de um módulo fotovoltaico a um coletor solar de placa plana, podendo ser promissor no progresso de novas tecnologias. Um coletor híbrido térmico fotovoltaico tem sua eficiência térmica menor que um coletor térmico convencional, decorrente de uma maior perda de calor para o meio, pois, em geral, o coletor não tem proteção contra o vento, como a cobertura transparente em um coletor convencional. A eficiência elétrica desses coletores híbridos é maior quando comparada a um sistema fotovoltaico convencional, pois há um resfriamento devido à passagem do fluido na parte posterior desses módulos. Para uma avaliação dessas eficiências, no presente trabalho, foram instalados três tipos de tecnologias que utilizam a energia solar como fonte, (um módulo fotovoltaico, um coletor híbrido térmico fotovoltaico e um coletor solar de placa plana) a fim de comparar os resultados de seus rendimentos, separadamente, atribuindo as mesmas condições meteorológicas em todos eles. A eficiência térmica máxima do coletor híbrido térmico fotovoltaico teve seu valor 3 vezes menor que o do coletor de placa plana utilizado. Já a eficiência elétrica de cada módulo teve um aumento de 5,5% comparando a diferença de energia elétrica gerada ao longo de um ano. Com esses resultados, pode-se dizer que melhorias na parte térmica do coletor híbrido térmico fotovoltaico poderiam ser feitas, de forma a aumentar seu desempenho térmico sem comprometer o rendimento das suas células fotovoltaicas.

The use of solar energy for thermal application and production of electric energy is becoming more important, because it is a form of clean and renewable energy. The studies of these sources are intensifying to improve the performance of these technologies and their applications for the current conditions of the development around the world. One of this technologies using as a source solar energy, developed in the last 30 years is the photovoltaic thermal hybrid solar collector. This collector simultaneously converts the solar radiation into thermal and electrical energy, with the superposition of a photovoltaic module on a flat plate solar collector, may be promising in the progress of new technologies. That a photovoltaic thermal hybrid solar collector has a lower thermal efficiency than a conventional thermal collector, due a greater loss of heat to the environment, because in general the collector has no protection from the wind, as the transparent cover in a…

Advisors/Committee Members: Krenzinger, Arno.

Subjects/Keywords: Energia solar; Solar energy; Coletor solar; Photovoltaic thermal hybrid solar collector; Módulo fotovoltaico; Thermal efficiency; Electrical efficiency

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ancines, C. A. (2016). Comparação entre o desempenho de um coletor híbrido térmico fotovoltaico com o de um coletor plano e um módulo fotovoltaico convencional. (Thesis). Universidade do Rio Grande do Sul. Retrieved from http://hdl.handle.net/10183/149352

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ancines, Crissiane Alves. “Comparação entre o desempenho de um coletor híbrido térmico fotovoltaico com o de um coletor plano e um módulo fotovoltaico convencional.” 2016. Thesis, Universidade do Rio Grande do Sul. Accessed February 27, 2021. http://hdl.handle.net/10183/149352.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ancines, Crissiane Alves. “Comparação entre o desempenho de um coletor híbrido térmico fotovoltaico com o de um coletor plano e um módulo fotovoltaico convencional.” 2016. Web. 27 Feb 2021.

Vancouver:

Ancines CA. Comparação entre o desempenho de um coletor híbrido térmico fotovoltaico com o de um coletor plano e um módulo fotovoltaico convencional. [Internet] [Thesis]. Universidade do Rio Grande do Sul; 2016. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10183/149352.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ancines CA. Comparação entre o desempenho de um coletor híbrido térmico fotovoltaico com o de um coletor plano e um módulo fotovoltaico convencional. [Thesis]. Universidade do Rio Grande do Sul; 2016. Available from: http://hdl.handle.net/10183/149352

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

13. Qureshi, Harris Farooq. Evaluation of Building Integrated Heating System in Terms of Thermal Comfort & Energy Efficiency : A Case Study of Multistory Apartment Buildings in Kumla.

Degree: Sustainable Development of Society and Technology, 2011, Mälardalen University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-12898

► This work comprises of a detail study of the impact of building integrated heating (BIH) systems on energy efficiency and thermal comfort. The work… (more)

▼ This work comprises of a detail study of the impact of building integrated heating (BIH) systems on energy efficiency and thermal comfort. The work has been sponsored by a company called Thermotech AB which supplied the BIH system for twin apartment buildings in Kumla owned by Kumla Bostäder. Comprehensive energy analysis was done using IDA simulation software for the building with normal radiator heating and BIH heating systems. The analysis showed 7.5 % annual savings in favor of the BIH system but since the ground and first floor thermostatic set point was not achieved we are a bit skeptical about the actual savings. Detailed literature study in this regard showed that there was no significant difference in the energy consumption for both of the systems. In the case of thermal comfort there are many citations preferring the integrated heating with features like better comfort, air quality, less noisy system ,flexible room layout and ability to use a sustainable source such as solar power. Simulations for thermal comfort were unable to determine any significant betterment of one system over the other as both were theoretically able to deliver the same comfort. Actual measurements however showed extremely good PPD % values during a hot summer day. Unfortunately a winter measurement could not be taken due to time constraint but is a strong recommendation for further work. A detailed survey was also conducted to gauge the people’s reaction on the system during the past winter. While most of the people were satisfied average PMV of around 0.5, people from lower floors did complain about it being too cold during the winter. Some complained about it being too warm during summer time which is understandable as there no external shades and the ventilation system runs at constant speed. Some people had complains about the air quality and lack of ventilation as well. In conclusion the system’s superior thermal comfort over the conventional radiator circuit cannot be denied but its energy efficiency features may be up for debate. We recommend the system in spite of the additional cost due to the comfort for the occupants and the fact that it utilizes a low temperature source which is much more sustainable and environment friendly then the conventional high temperature sources.

Subjects/Keywords: Building Integrated Heating; Energy Efficiency; IDA Simulations; Sustainability; Thermal Comfort Meter; Thermal Comfort Survey.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Qureshi, H. F. (2011). Evaluation of Building Integrated Heating System in Terms of Thermal Comfort & Energy Efficiency : A Case Study of Multistory Apartment Buildings in Kumla. (Thesis). Mälardalen University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-12898

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Qureshi, Harris Farooq. “Evaluation of Building Integrated Heating System in Terms of Thermal Comfort & Energy Efficiency : A Case Study of Multistory Apartment Buildings in Kumla.” 2011. Thesis, Mälardalen University. Accessed February 27, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-12898.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Qureshi, Harris Farooq. “Evaluation of Building Integrated Heating System in Terms of Thermal Comfort & Energy Efficiency : A Case Study of Multistory Apartment Buildings in Kumla.” 2011. Web. 27 Feb 2021.

Vancouver:

Qureshi HF. Evaluation of Building Integrated Heating System in Terms of Thermal Comfort & Energy Efficiency : A Case Study of Multistory Apartment Buildings in Kumla. [Internet] [Thesis]. Mälardalen University; 2011. [cited 2021 Feb 27]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-12898.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Qureshi HF. Evaluation of Building Integrated Heating System in Terms of Thermal Comfort & Energy Efficiency : A Case Study of Multistory Apartment Buildings in Kumla. [Thesis]. Mälardalen University; 2011. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-12898

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

14. Šumić, Mersiha. Thermal Performance of a Solarus CPC-Thermal Collector.

Degree: Energy and Environmental Technology, 2014, Dalarna University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:du-14526

► The aim of this master thesis is an investigation of the thermal performance of a thermal compound parabolic concentrating (CPC) collector from Solarus. The… (more)

▼ The aim of this master thesis is an investigation of the thermal performance of a thermal compound parabolic concentrating (CPC) collector from Solarus. The collector consists of two troughs with absorbers which are coated with different types of paint with unknown properties. The lower and upper trough of the collector have been tested individually. In order to accomplish the performance of the two collectors, a thorough literature study in the fields of CPC technology, various test methods, test standards for solar thermal collectors as well as the latest articles relating on the subject were carried out. In addition, the set‐up of the thermal test rig was part of the thesis as well. The thermal performance was tested according to the steady state test method as described in the European standard 12975‐2. Furthermore, the thermal performance of a conventional flat plate collector was carried out for verification of the test method. The CPC‐Thermal collector from Solarus was tested in 2013 and the results showed four times higher values of the heat loss coefficient U_L (8.4 W/m²K) than what has been reported for a commercial collector from Solarus. This value was assumed to be too large and it was assumed that the large value was a result of the test method used that time. Therefore, another aim was the comparison of the results achieved in this work with the results from the tests performed in 2013. The results of the thermal performance showed that the optical efficiency of the lower trough of the CPC‐T collector is 77±5% and the corresponding heat loss coefficient U_L4.84±0.20 W/m²K. The upper trough achieved an optical efficiency of 75±6 % and a heat loss coefficient U_L of 6.45±0.27 W/m²K. The results of the heat loss coefficients are valid for temperature intervals between 20°C and 80°C. The different absorber paintings have a significant impact on the results, the lower trough performs overall better. The results achieved in this thesis show lower heat loss coefficients U_L and higher optical efficiencies compared to the results from 2013.

Subjects/Keywords: Solar Thermal Collector; Compound parabolic concentrator; MaReCo design; Thermal optical efficiency; Heat loss coefficient

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Šumić, M. (2014). Thermal Performance of a Solarus CPC-Thermal Collector. (Thesis). Dalarna University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:du-14526

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Šumić, Mersiha. “Thermal Performance of a Solarus CPC-Thermal Collector.” 2014. Thesis, Dalarna University. Accessed February 27, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:du-14526.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Šumić, Mersiha. “Thermal Performance of a Solarus CPC-Thermal Collector.” 2014. Web. 27 Feb 2021.

Vancouver:

Šumić M. Thermal Performance of a Solarus CPC-Thermal Collector. [Internet] [Thesis]. Dalarna University; 2014. [cited 2021 Feb 27]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:du-14526.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Šumić M. Thermal Performance of a Solarus CPC-Thermal Collector. [Thesis]. Dalarna University; 2014. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:du-14526

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Victoria University of Wellington

15. Imani, Marzieh. A thermo-bio-architectural framework (ThBA) for finding inspiration in nature: Biomimetic energy efficient building design.

Degree: 2020, Victoria University of Wellington

URL: http://hdl.handle.net/10063/8875

► Design inspired by nature has been known as biomimicry or biomimetic design that is believed to transform human technologies into a sustainable status through translation… (more)

▼ Design inspired by nature has been known as biomimicry or biomimetic design that is believed to transform human technologies into a sustainable status through translation of biological models, systems, and processes. Considering energy efficiency as one of the aspects of sustainability in the concept of bio-inspired building design, the problem was how to access the solutions best matched to the design problem. Various tools for finding existing knowledge from a different domain are described but as yet there appears to be no tool for allowing building designers to access the efficient ways found in nature of producing energy, using energy, and recycling resources. What the research investigated was to find if it is possible to develop a generalised thermo-bio-architectural (ThBA) framework by use of which architects would be able to improve the energy performance of buildings in a wide range of climates, by following a systematic process that methodically connects design thermal challenges to thermal adaptation principles used in nature. The ThBA was developed by studying biology to find how thermal regulation strategies used by living organisms can be classified and generalised. The proposed ThBA was confirmed and evaluated before it was used for the rest of the research. The biological part of the ThBA was assessed by biological experts within a focus group session. Having the ThBA confirmed, the research also investigated how the heat transfer principles in buildings can be articulated to be linked to the generalised thermal adaptation strategies in nature. For this, a series of case studies were selected and for each an energy simulation was run to analyse its thermal performance and identify its thermal challenges. Then, the ThBA was used to introduce innovative solutions for improving the thermal performance of the case studies with big energy use to reveal unexpected techniques or technologies. This, however, necessitated its reconfiguration so as to be useful for architects. Testing the ThBA for two extreme climates in New Zealand, highlighted the fact that the simple translation of the majority of biological thermal adaptation principles are being used by architects, although for some, the architectural equivalents did not function in exactly in the same way as biological thermoregulation strategies. The differences were seen either in the central thermoregulatory principles or the broader properties within which the key principles fitted. Apart from that, for both architectural and biological thermoregulatory strategies the heat transfer parameter and methods were the same. Given that, in a context where biomimicry is understood as the imitation of complicated thermoregulatory solutions in nature for which innovation is evolutionary achieved, the term biomimetics seems to not have a place in the context of bio-inspired energy efficient design considering the current state of technology. The ThBA, however, suggested a few strategies that might address opportunities for designing a new generation of… Advisors/Committee Members: Donn, Michael, Vale, Brenda.

Subjects/Keywords: Biomimetic design; Energy efficiency; Sustainable design; Thermal performance; Thermoregulation; Thermal adaptation; Bio-inspiration; Biomimicry

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Imani, M. (2020). A thermo-bio-architectural framework (ThBA) for finding inspiration in nature: Biomimetic energy efficient building design. (Doctoral Dissertation). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/8875

Chicago Manual of Style (16^th Edition):

Imani, Marzieh. “A thermo-bio-architectural framework (ThBA) for finding inspiration in nature: Biomimetic energy efficient building design.” 2020. Doctoral Dissertation, Victoria University of Wellington. Accessed February 27, 2021. http://hdl.handle.net/10063/8875.

MLA Handbook (7^th Edition):

Imani, Marzieh. “A thermo-bio-architectural framework (ThBA) for finding inspiration in nature: Biomimetic energy efficient building design.” 2020. Web. 27 Feb 2021.

Vancouver:

Imani M. A thermo-bio-architectural framework (ThBA) for finding inspiration in nature: Biomimetic energy efficient building design. [Internet] [Doctoral dissertation]. Victoria University of Wellington; 2020. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10063/8875.

Council of Science Editors:

Imani M. A thermo-bio-architectural framework (ThBA) for finding inspiration in nature: Biomimetic energy efficient building design. [Doctoral Dissertation]. Victoria University of Wellington; 2020. Available from: http://hdl.handle.net/10063/8875

Delft University of Technology

16. Farrugia, Eve (author). Thermal Morphology: A Geometrically Optimized Trombe Wall.

Degree: 2018, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:0ad5f3cc-a5e9-45c0-a37e-75e139713409

►

Recently, there has been a growing interest in passive climate design aimed at reducing the large energy demand arising from existing buildings. Sustainable consumption of… (more)

▼

Recently, there has been a growing interest in passive climate design aimed at reducing the large energy demand arising from existing buildings. Sustainable consumption of quantities of energy by buildings has necessitated research into innovative designs for comfortable and energy-efficient buildings. This graduation project branches out from this research field and focuses on experimentation with geometry and its effects on thermal mass in the context of architecture. It is known that geometry has an impact on thermal performance, however information regarding alternatives for material distribution to improve thermal performance is somewhat limited. The main objective of this research is to identify how geometry could influence and enhance the thermal performance to reduce the overall energy consumption in a specific context. This graduation project focuses on thermal mass in the form of a trombe wall in office building typologies. It also targets the use of translucent Phase Change Materials (PCM) as a thermal energy storage material for lightweight building components in the context of two different climates; a hot and dry climate and a temperate climate. A combination of simulation and modelling software is used to determine the effect of geometry on the thermal performance of the trombe wall with PCM in two different climates. A stepped methodology is used to morph a flat wall following a series of design strategies and two different geometry scales. By analysing the differences in air and PCM temperatures it is determined whether geometrical morphology is beneficial in terms of a comfortable air temperature in an office. General trends are identified which highlight the potential of material distribution in thermal performance in the context of PCM and trombe walls. These trends are then transformed into design guidelines and two different designs for a trombe wall with translucent PCM in the two climates.

Building Technology | Sustainable Graduation Studio

Advisors/Committee Members: Tenpierik, Martin (mentor), Turrin, Michela (mentor), Delft University of Technology (degree granting institution).

Subjects/Keywords: Morphology; Thermal Performance; PCM; Trombe Wall; Optimization; Energy Efficiency; Thermal comfort; Geometry

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Farrugia, E. (. (2018). Thermal Morphology: A Geometrically Optimized Trombe Wall. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:0ad5f3cc-a5e9-45c0-a37e-75e139713409

Chicago Manual of Style (16^th Edition):

Farrugia, Eve (author). “Thermal Morphology: A Geometrically Optimized Trombe Wall.” 2018. Masters Thesis, Delft University of Technology. Accessed February 27, 2021. http://resolver.tudelft.nl/uuid:0ad5f3cc-a5e9-45c0-a37e-75e139713409.

MLA Handbook (7^th Edition):

Farrugia, Eve (author). “Thermal Morphology: A Geometrically Optimized Trombe Wall.” 2018. Web. 27 Feb 2021.

Vancouver:

Farrugia E(. Thermal Morphology: A Geometrically Optimized Trombe Wall. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Feb 27]. Available from: http://resolver.tudelft.nl/uuid:0ad5f3cc-a5e9-45c0-a37e-75e139713409.

Council of Science Editors:

Farrugia E(. Thermal Morphology: A Geometrically Optimized Trombe Wall. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:0ad5f3cc-a5e9-45c0-a37e-75e139713409

University of Illinois – Urbana-Champaign

17. Ghoreishi, Amirhossein. Assessment of thermal mass property for energy efficiency and thermal comfort in concrete office buildings.

Degree: PhD, Architecture, 2015, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/78282

► The increasing use of concrete as a material propelled by the recent advancements in concrete technology is facing the prospect of its massive growth in… (more)

Subjects/Keywords: sustainability; heating and cooling energies; thermal comfort; energy efficiency; concrete thermal mass

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APA (6^th Edition):

Ghoreishi, A. (2015). Assessment of thermal mass property for energy efficiency and thermal comfort in concrete office buildings. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/78282

Chicago Manual of Style (16^th Edition):

Ghoreishi, Amirhossein. “Assessment of thermal mass property for energy efficiency and thermal comfort in concrete office buildings.” 2015. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed February 27, 2021. http://hdl.handle.net/2142/78282.

MLA Handbook (7^th Edition):

Ghoreishi, Amirhossein. “Assessment of thermal mass property for energy efficiency and thermal comfort in concrete office buildings.” 2015. Web. 27 Feb 2021.

Vancouver:

Ghoreishi A. Assessment of thermal mass property for energy efficiency and thermal comfort in concrete office buildings. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2015. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/2142/78282.

Council of Science Editors:

Ghoreishi A. Assessment of thermal mass property for energy efficiency and thermal comfort in concrete office buildings. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2015. Available from: http://hdl.handle.net/2142/78282

Universidade do Minho

18. Jardim, Fátima Maria Gomes. Proposta de Intervenção de reabilitação energética de edifícios de habitação .

Degree: 2009, Universidade do Minho

URL: http://hdl.handle.net/1822/10703

► O desperdício energético constitui um dos factores de maior impacto sobre o desequilíbrio ambiental enfrentado pelo planeta. Actualmente, em Portugal o sector de edifícios consome… (more)

▼ O desperdício energético constitui um dos factores de maior impacto sobre o desequilíbrio ambiental enfrentado pelo planeta. Actualmente, em Portugal o sector de edifícios consome aproximadamente 31% da energia final utilizada no país, situando-se como o sector mais importante, logo a seguir ao dos transportes. Deste valor o sector residencial é responsável por cerca de 18% do consumo, contribuindo significativamente para a emissão de gases com efeito de estufa. O consumo de energia depende de muitas variáveis, contudo pode-se afirmar que a componente principal resulta do uso quotidiano do edifício. No geral, o consumo provém de duas condições: uso intensivo de instalações (aquecimento e arrefecimento, iluminação, equipamentos, etc.) e um comportamento extremamente dissipativo do edifício (edifícios sem isolamento térmico e ou sem inércia térmica). O parque habitacional português supera actualmente os 5,5 milhões de alojamentos familiares clássicos, pelo que o potencial de poupança neste sector é muito significativo. O presente trabalho consistiu no estudo da reabilitação energética de edifícios existentes pela redução do consumo energético, através de medidas de reforço térmico na envolvente. Com efeito apesar de não existir qualquer obrigatoriedade dos proprietários procederem à realização de obras, tendo em vista a melhoria do desempenho energético, esta dissertação demonstra que existem vantagens objectivas que podem tornar essa decisão bastante favorável. Um dos argumentos mais decisivos será a evidência de que o investimento inicial é recuperado num período de tempo relativamente curto, considerando o tempo de vida útil dos edifícios. Para compreender a importância da reabilitação energética recorreu-se a dois casos de estudo representativos da construção corrente, para habitação, praticada em Portugal nas últimas décadas. A metodologia desenvolvida atende aos trabalhos de caracterização do desempenho energético do existente e o diagnostico preciso das deficiências apresentadas, propondo soluções de reabilitação térmica e energética, percebendo se as mesmas reduzem o consumo de energia ao ponto de se tornarem económica e ambientalmente sustentáveis. Adoptou-se a metodologia simplificada usada no actual RCCTE. Foram consideradas variações de reforço e de espessura de isolamento para efectuar as simulações às fracções consideradas mais exigentes. Dessa forma, é possível investigar a interdependência de vários parâmetros e estabelecer análises comparativas. Os resultados mostraram que, através da aplicação de medidas de reabilitação, pode-se conseguir poupanças assinaláveis de energia consumida para aquecimento. O estudo sublinha que o investimento em requalificação energética de edifícios deve ser realizado caso a caso, através de um levantamento rigoroso dos consumos energéticos de cada fracção. Finalmente foi desenvolvido um modelo financeiro que possibilita a previsão do tempo de retorno do investimento, juntamente com a análise do rácio benefício/custo para perceber a… Advisors/Committee Members: Almeida, Manuela Guedes de (advisor).

Subjects/Keywords: Eficiência Energética; Reabilitação; Térmica; Sustentabilidade; Efficiency; Rehabilitation; Thermal; Sustainability

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APA (6^th Edition):

Jardim, F. M. G. (2009). Proposta de Intervenção de reabilitação energética de edifícios de habitação . (Masters Thesis). Universidade do Minho. Retrieved from http://hdl.handle.net/1822/10703

Chicago Manual of Style (16^th Edition):

Jardim, Fátima Maria Gomes. “Proposta de Intervenção de reabilitação energética de edifícios de habitação .” 2009. Masters Thesis, Universidade do Minho. Accessed February 27, 2021. http://hdl.handle.net/1822/10703.

MLA Handbook (7^th Edition):

Jardim, Fátima Maria Gomes. “Proposta de Intervenção de reabilitação energética de edifícios de habitação .” 2009. Web. 27 Feb 2021.

Vancouver:

Jardim FMG. Proposta de Intervenção de reabilitação energética de edifícios de habitação . [Internet] [Masters thesis]. Universidade do Minho; 2009. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/1822/10703.

Council of Science Editors:

Jardim FMG. Proposta de Intervenção de reabilitação energética de edifícios de habitação . [Masters Thesis]. Universidade do Minho; 2009. Available from: http://hdl.handle.net/1822/10703

19. Kosonen, Risto. The Effect of Thermal Plumes on the Performance of Ventilated Ceilings in Commercial Kitchens.

Degree: 2006, Helsinki University of Technology

URL: http://lib.tkk.fi/Diss/2006/isbn951228233X/

► The efficiency of the exhaust system is especially emphasised with a ventilated ceiling system where the exhaust is located at ceiling level. The removal efficiency… (more)

▼ The efficiency of the exhaust system is especially emphasised with a ventilated ceiling system where the exhaust is located at ceiling level. The removal efficiency of the total system must be guaranteed and the spread of impurities throughout the kitchen should be prevented. At the moment, none of the existing calculation standards are specially tailored for a kitchen ceiling environment. In the normal design practice, empirical knowledge of the existing installations together with heat load based calculation has been used for airflow rate determination. The starting point for this research was to study the effect of the thermal plumes and supply air systems on the efficiency of a ventilated ceiling. A special consideration was to analyze the effect of a capture jet on the contaminant removal efficiency. In that capture air concept, the air jet is projected horizontally across the ceiling, which helps to direct heat and air impurities towards the exhaust. From the practical point of view, the objective of this study was to develop a design process to compute the required air flow rate more accurately. In this study, the measured convection flows of kitchen appliances during idle and cooking modes were compared with the generic plume equation in which the virtual origin is constant. The generic plume equation derived in the region of complete flow similarity is not fully valid in the intermediate zone (0.8-2.0 m from appliances). Still, it is possible to reach a reasonable accuracy for practical applications with the adjusted virtual origin. The cooking process does not have any significant effect on the velocity and temperature distribution of the convection flow. The reason for this is that the mass flow rate of water during boiling is small compared with the induced air flow rate and therefore does not have a significant effect on the convection flow. Thus, the actual convection load and the product specific virtual origin can describe the plume during the cooking process. In the previous studies of thermal plumes, the velocity and temperature distribution factors are much higher than in the present study. In addition, the entrainment factors of the previous studies are much smaller than in this study. The measurements indicate that the heat gain has a significant effect on the spreading angle and the entrainment factor close to the heat source. The plumes with high heat gains are narrower and the convection flow induces more room air than the previous studies have pointed out. The efficiency of the exhaust system can be improved with a small capture jet installed at the ceiling surface. Both the measurement and simulated data give lower contaminant levels when the capture jet was introduced. The plume equation gives a platform to calculate the air flow rate that is theoretically required to remove the convective heat output of the appliance block. In this study, the flush-out factor of the supply air on the theoretical plume equation was derived for the centralized capture jet concept. For practical design… Advisors/Committee Members: Helsinki University of Technology, Department of Mechanical Engineering, Laboratory of Heating, Ventilating and Air Conditioning.

Subjects/Keywords: thermal plumes; commercial kitchen; capture jet; ventilation efficiency; displacement ventilation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kosonen, R. (2006). The Effect of Thermal Plumes on the Performance of Ventilated Ceilings in Commercial Kitchens. (Thesis). Helsinki University of Technology. Retrieved from http://lib.tkk.fi/Diss/2006/isbn951228233X/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kosonen, Risto. “The Effect of Thermal Plumes on the Performance of Ventilated Ceilings in Commercial Kitchens.” 2006. Thesis, Helsinki University of Technology. Accessed February 27, 2021. http://lib.tkk.fi/Diss/2006/isbn951228233X/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kosonen, Risto. “The Effect of Thermal Plumes on the Performance of Ventilated Ceilings in Commercial Kitchens.” 2006. Web. 27 Feb 2021.

Vancouver:

Kosonen R. The Effect of Thermal Plumes on the Performance of Ventilated Ceilings in Commercial Kitchens. [Internet] [Thesis]. Helsinki University of Technology; 2006. [cited 2021 Feb 27]. Available from: http://lib.tkk.fi/Diss/2006/isbn951228233X/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kosonen R. The Effect of Thermal Plumes on the Performance of Ventilated Ceilings in Commercial Kitchens. [Thesis]. Helsinki University of Technology; 2006. Available from: http://lib.tkk.fi/Diss/2006/isbn951228233X/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Michigan

20. Chang, Yan. Fuel Reforming for High Efficiency and Dilution Limit Extension of Spark-ignited Engines.

Degree: PhD, Mechanical Engineering, 2018, University of Michigan

URL: http://hdl.handle.net/2027.42/144107

► Engine efficiency improvement can help combustion powertrains, which include conventional, hybrid, and plug-in hybrid systems, to meet the strict emissions standards and the increasing demand… (more)

▼ Engine efficiency improvement can help combustion powertrains, which include conventional, hybrid, and plug-in hybrid systems, to meet the strict emissions standards and the increasing demand from customers for performance, drivability, and affordability of vehicles. Cooled exhaust gas recirculation (EGR) can reduce fuel consumption and NOx emissions of gasoline engine systems while keeping the capability of using a conventional three-way catalyst for effective emissions reduction. However, too much EGR would lead to combustion instability and misfire. This thesis identified opportunities to improve efficiency in internal combustion engines by high EGR dilution SI combustion by using thermodynamics-based approaches. This goal has been achieved by using fuel reforming in a thermodynamically-favorable way. Exhaust heat was used to drive endothermic reforming reactions to increase the chemical fuel energy to attain thermochemical recuperation (TCR), a form of waste heat recovery, with robust integrated systems and the regular gasoline. Three strategies for fuel reforming, along with the unique designs of corresponding integrated engine systems, a committed in-cylinder reformer, a catalytic EGR-loop reforming system, and fuel reforming by fuel injection during Negative Valve Overlap (NVO), have been proposed and investigated with unique engine system setups and corresponding experimental and simulation research. The concept and the system to use one cylinder to serve as a committed fuel reformer without spark ignition is first demonstrated. The committed in-cylinder reformer engine system achieves 8% brake thermal efficiency improvement through EGR and cylinder deactivation effects, even though there is low fuel conversion. The novel catalytic EGR-loop reforming integrated engine system was designed and tested. The experiments and thermodynamic equilibrium calculations reveal that the suppression of H2 and CO caused by the enthalpy limitation could be countered by adding small amounts of O2 by running one-cylinder lean. As much as 15 volume % H2 at the catalyst outlet is produced when the fuel and air equivalence ratio is between 4 and 7 under quasi-steady-state conditions. It is also found that this catalytic EGR reforming strategy makes it possible to sustain stable combustion with a volumetric equivalent of 45%–55% EGR, compared to a baseline EGR dilution limit which is under 25%. This catalytic EGR-loop reforming strategy results in a decrease of more than 8% in fuel consumption with significant potentials for even higher brake thermal efficiency. This novel design also opens up a new control method to control the amount of fuel reforming and the fraction of the partial oxidation reaction and steam reforming reaction by adjusting the lambda value of the cylinder which is running lean. Through this design, the engine is serving as an active system, which can also be adapted to respond to the needs of the passive catalyst system so that even better more significant benefit can be achieved. The results demonstrate… Advisors/Committee Members: Boehman, Andre L (committee member), Bohac, Stani V (committee member), Schwank, Johannes W (committee member), Fisher, Galen B (committee member), Szybist, James (committee member), Wooldridge, Margaret S (committee member).

Subjects/Keywords: Fuel Reforming; Thermal Efficiency; Vehicles; Mechanical Engineering; Engineering; Science

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APA (6^th Edition):

Chang, Y. (2018). Fuel Reforming for High Efficiency and Dilution Limit Extension of Spark-ignited Engines. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/144107

Chicago Manual of Style (16^th Edition):

Chang, Yan. “Fuel Reforming for High Efficiency and Dilution Limit Extension of Spark-ignited Engines.” 2018. Doctoral Dissertation, University of Michigan. Accessed February 27, 2021. http://hdl.handle.net/2027.42/144107.

MLA Handbook (7^th Edition):

Chang, Yan. “Fuel Reforming for High Efficiency and Dilution Limit Extension of Spark-ignited Engines.” 2018. Web. 27 Feb 2021.

Vancouver:

Chang Y. Fuel Reforming for High Efficiency and Dilution Limit Extension of Spark-ignited Engines. [Internet] [Doctoral dissertation]. University of Michigan; 2018. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/2027.42/144107.

Council of Science Editors:

Chang Y. Fuel Reforming for High Efficiency and Dilution Limit Extension of Spark-ignited Engines. [Doctoral Dissertation]. University of Michigan; 2018. Available from: http://hdl.handle.net/2027.42/144107

University of Edinburgh

21. O'Connor, Lucy. A study of the thermal improvement methods employed on traditional building fabric: Specific to traditional Scottish stone walls and slate roofs.

Degree: 2013, University of Edinburgh

URL: http://hdl.handle.net/1842/8749

► The energy efficiency of traditional buildings has become increasingly important in the design and construction industry over the past forty years or so. Instigated initially… (more)

Subjects/Keywords: Conservation; Energy-efficiency; Insulation; Thermal improvement; Traditional architecture

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APA (6^th Edition):

O'Connor, L. (2013). A study of the thermal improvement methods employed on traditional building fabric: Specific to traditional Scottish stone walls and slate roofs. (Thesis). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/8749

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

O'Connor, Lucy. “A study of the thermal improvement methods employed on traditional building fabric: Specific to traditional Scottish stone walls and slate roofs.” 2013. Thesis, University of Edinburgh. Accessed February 27, 2021. http://hdl.handle.net/1842/8749.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

O'Connor, Lucy. “A study of the thermal improvement methods employed on traditional building fabric: Specific to traditional Scottish stone walls and slate roofs.” 2013. Web. 27 Feb 2021.

Vancouver:

O'Connor L. A study of the thermal improvement methods employed on traditional building fabric: Specific to traditional Scottish stone walls and slate roofs. [Internet] [Thesis]. University of Edinburgh; 2013. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/1842/8749.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

O'Connor L. A study of the thermal improvement methods employed on traditional building fabric: Specific to traditional Scottish stone walls and slate roofs. [Thesis]. University of Edinburgh; 2013. Available from: http://hdl.handle.net/1842/8749

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

22. Guerra, Isabel Maria Bagulho. Avaliação da eficiência energética e optimização de uma unidade de trigeração.

Degree: 2013, Instituto Politécnico do Porto

URL: http://www.rcaap.pt/detail.jsp?id=oai:recipp.ipp.pt:10400.22/4973

►

Portugal é um país dependente da energia do exterior, devido à elevada percentagem de consumo de energia a partir de fontes primárias, como por exemplo… (more)

▼

Portugal é um país dependente da energia do exterior, devido à elevada percentagem de consumo de energia a partir de fontes primárias, como por exemplo o gasóleo. Para colmatar este cenário, têm vindo a criar-se incentivos para o uso de energias renováveis e para intensificação de medidas de eficiência energética, como os sistemas de cogeração, de forma a tornar os processos industriais nacionais mais autónomos e mais competitivos. O presente trabalho, centra-se na determinação do potencial térmico disponível na central de trigeração da empresa Monteiro, Ribas-Indústria, SA, com a finalidade de identificar a quantidade de energia não utilizada, com vista ao aproveitamento dessa mesma energia nos processos mais problemáticos da empresa. Verificou-se que a água líquida era a fonte de maior energia não aproveitada, representando cerca de 30%, relativamente à energia disponível na água de refrigeração que é de 1890 kW. Assim, perante este facto, fez-se um estudo em dois setores autónomos da empresa, o setor dos revestimentos e o setor dos componentes técnicos da borracha. Pretendeu-se propor medidas para melhorar os seus processos produtivos, aproveitando essa energia. Para o efeito foi projetado um permutador de calor de placas com necessidade energética de 131,4 MWh, no setor dos revestimentos e um permutador compacto no setor de produção de placas de borracha, necessitando de uma energia de 335,2 MWh. Face à energia disponível na central de trigeração, de 161,9 MWh, verifica-se que esta apenas poderá ser aproveitada no setor dos revestimentos. Para tornar este objetivo real, a empresa Monteiro, Ribas- Indústria, SA necessitaria de efetuar um investimento no total de 49.390€. Além disso, foi contabilizado o rendimento das caldeiras da central térmica e da cogeração, ambas pelo método direto, apresentando estas os valores de 72% e 42%, respectivamente.

Portugal is a country dependent on foreign energy, due to the high percentage of energy consumption from primary sources, such as diesel. To overcome this scenario, incentives for the use of renewable energies and for the intensification of energy efficiency measures have been created, such as the cogeneration systems, in order to make the national industrial processes more autonomous and competitive. The present work focuses on the determination of the thermal potential available at the trigeneration at the company Monteiro, Ribas-Indústria, SA, with the purpose of identifying the amount of wasted energy in order to make use of that same energy in the most problematic processes at the firm. It has been found that liquid water was the main source of wasted energy, representing around 30%, relative to the energy available in cooling water, which is 1890 kW. So, given this fact, a study was carried out in two autonomous sectors of the company, the industry sector of coatings and the sector of technical rubber components. The intention was to propose measures to improve the production processes, by taking advantage of that energy. For this purpose, a plate heat exchanger…

Advisors/Committee Members: Pimenta, Teresa, Esteves, Teresa Sena.

Subjects/Keywords: Cogeração; Eficiência energética; Potencial térmico; Cogeneration; Energy efficiency; Thermal potential

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Guerra, I. M. B. (2013). Avaliação da eficiência energética e optimização de uma unidade de trigeração. (Thesis). Instituto Politécnico do Porto. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:recipp.ipp.pt:10400.22/4973

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Guerra, Isabel Maria Bagulho. “Avaliação da eficiência energética e optimização de uma unidade de trigeração.” 2013. Thesis, Instituto Politécnico do Porto. Accessed February 27, 2021. http://www.rcaap.pt/detail.jsp?id=oai:recipp.ipp.pt:10400.22/4973.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Guerra, Isabel Maria Bagulho. “Avaliação da eficiência energética e optimização de uma unidade de trigeração.” 2013. Web. 27 Feb 2021.

Vancouver:

Guerra IMB. Avaliação da eficiência energética e optimização de uma unidade de trigeração. [Internet] [Thesis]. Instituto Politécnico do Porto; 2013. [cited 2021 Feb 27]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:recipp.ipp.pt:10400.22/4973.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Guerra IMB. Avaliação da eficiência energética e optimização de uma unidade de trigeração. [Thesis]. Instituto Politécnico do Porto; 2013. Available from: http://www.rcaap.pt/detail.jsp?id=oai:recipp.ipp.pt:10400.22/4973

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Wollongong

23. Ledo, Laia. Energy efficiency and thermal comfort upgrades for higher education buildings.

Degree: PhD, Faculty of Engineering, 2015, University of Wollongong

URL: ; https://ro.uow.edu.au/theses/4712

► Existing higher education buildings have an important role in the minimisation of greenhouse gas emissions from our built environment and in assisting the mitigation… (more)

Subjects/Keywords: Higher Education buildings; thermal comfort; energy efficiency; retrofit; sensitivity analysis; optimisation

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ledo, L. (2015). Energy efficiency and thermal comfort upgrades for higher education buildings. (Doctoral Dissertation). University of Wollongong. Retrieved from ; https://ro.uow.edu.au/theses/4712

Chicago Manual of Style (16^th Edition):

Ledo, Laia. “Energy efficiency and thermal comfort upgrades for higher education buildings.” 2015. Doctoral Dissertation, University of Wollongong. Accessed February 27, 2021. ; https://ro.uow.edu.au/theses/4712.

MLA Handbook (7^th Edition):

Ledo, Laia. “Energy efficiency and thermal comfort upgrades for higher education buildings.” 2015. Web. 27 Feb 2021.

Vancouver:

Ledo L. Energy efficiency and thermal comfort upgrades for higher education buildings. [Internet] [Doctoral dissertation]. University of Wollongong; 2015. [cited 2021 Feb 27]. Available from: ; https://ro.uow.edu.au/theses/4712.

Council of Science Editors:

Ledo L. Energy efficiency and thermal comfort upgrades for higher education buildings. [Doctoral Dissertation]. University of Wollongong; 2015. Available from: ; https://ro.uow.edu.au/theses/4712

University of Adelaide

24. Sarker, Md. Rabiul Islam. The effect of solid particle recirculation on the efficiency of a cavity-type solar receiver.

Degree: 2015, University of Adelaide

URL: http://hdl.handle.net/2440/99172

► High temperature steam or gas is used as the working medium for operation in advanced power conversion units, such as gas turbines or combined cycle… (more)

▼ High temperature steam or gas is used as the working medium for operation in advanced power conversion units, such as gas turbines or combined cycle power plants. The use of Concentrated Solar Power (CSP) technologies for energy generation relies on the heating of fluids to high temperatures. Conventional tubular or porous absorber volumetric receivers usually suffer from a relatively low thermal efficiency, less than 70%, and from high thermal losses. The solid particle solar receiver, in which the incoming solar radiation is directly absorbed by the solid particles and inner walls of the cavity receiver, promises to achieve higher thermal efficiency due to the enhanced heat transfer to the working fluid and the reduction in thermal losses. The main challenge in designing a high temperature solar receiver is to maximize the solar energy absorption and its efficient transfer to the working fluid, e.g. air. The objective of this research project is to characterize the thermal behaviour of a proposed cavity-type solar receiver concept based on the application of recirculating solid particles to achieve high temperature outlet air. In this concept, solar energy is absorbed by recirculating solid metallic particles, which, at the same time, transfer the absorbed thermal energy to the surrounding air in a cavity-type receiver. The cavity-type solid particle receiver is a well-insulated enclosure, designed to capture the incident solar radiation effectively, which allows the incident radiation directly through an aperture. In this study, a well-insulated cavity-type enclosure was designed and constructed. The designed solar receiver consisted of an externally insulated cylindrical cavity with a circular aperture at the top covered by a quartz glass, a recirculating fan installed at the bottom of the chamber and with an inlet and an outlet installed on the chamber wall. A series of experiments were conducted to characterize the fluid dynamics and thermal behaviour of the solar receiver. The results showed that the direction of the total air flow velocity was vertically upward from the outer periphery of the fan and vertically downward through the centre of the receiver. The measured air flow velocity was normalized by against the particle terminal velocity. The results showed that the normalized flow velocity was 3 times higher than the particles terminal velocity and 45 times higher than the minimum fluidization velocity of particles for the same case. Hence the particle can be recirculated in the cavity. The particles’ concentration at different regions of the solar receiver was also measured using a laser-based light-scattering technique. Black SiC of 70micron and 200micron SiC particle were used during this experiment. The effect of particle size and fan RPM on the particle concentration at different regions of the solar receiver was optimized using the test results of the particle concentration measurements. At an RPM of 1250, the measured opacity of the particle cloud’s concentration was 0.95 for 70micron and 0.80… Advisors/Committee Members: Arjomandi, Maziar (advisor), Dally, Bassam B. (advisor), School of Mechanical Engineering (school).

Subjects/Keywords: solar receiver; cavity type; solid particle; thermal efficiency

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sarker, M. R. I. (2015). The effect of solid particle recirculation on the efficiency of a cavity-type solar receiver. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/99172

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sarker, Md Rabiul Islam. “The effect of solid particle recirculation on the efficiency of a cavity-type solar receiver.” 2015. Thesis, University of Adelaide. Accessed February 27, 2021. http://hdl.handle.net/2440/99172.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sarker, Md Rabiul Islam. “The effect of solid particle recirculation on the efficiency of a cavity-type solar receiver.” 2015. Web. 27 Feb 2021.

Vancouver:

Sarker MRI. The effect of solid particle recirculation on the efficiency of a cavity-type solar receiver. [Internet] [Thesis]. University of Adelaide; 2015. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/2440/99172.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sarker MRI. The effect of solid particle recirculation on the efficiency of a cavity-type solar receiver. [Thesis]. University of Adelaide; 2015. Available from: http://hdl.handle.net/2440/99172

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Pretoria

25. Katamba, Kanwayi Gaettan. Investigation into waste heat to work in thermal systems in order to gain more efficiency and less environmental defect.

Degree: MSc, Mechanical and Aeronautical Engineering, 2016, University of Pretoria

URL: http://hdl.handle.net/2263/61300

► In most previous studies that have been conducted on converting waste heat energy from exhaust gases into useful energy, the engine waste heat recovery system… (more)

▼ In most previous studies that have been conducted on converting waste heat energy from exhaust gases into useful energy, the engine waste heat recovery system has been placed along the exhaust flow pipe where the temperature differs from the temperature just behind the exhaust valves. This means that an important fraction of the energy from the exhaust gases is still lost to the environment. The present work investigates the potential thermodynamic analysis of an integrated exhaust waste heat recovery (EWHR) system based on a Rankine cycle on an engine's exhaust manifold. The amount of lost energy contained in the exhaust gases at the exhaust manifold level, at average temperatures of 500 °C and 350 °C (for petrol and diesel), and the thermodynamic composition of these gases were determined. For heat to occur, a temperature difference (between the exhaust gas and the working fluid) at the pinch point of 20°C was considered. A thermodynamic analysis was performed on different configurations of EWHR thermal efficiencies and the selected suitable working fluids. The environmental and economic aspects of the integrated EWHR system just behind the exhaust valves of an internal combustion engine (ICE) were analysed. Among all working fluids that were used when the thermodynamic analysis was performed, water was selected as the best working fluid due to its higher thermal efficiency, availability, low cost and environmentally friendly characteristics. Using the typical engine data, results showed that almost 29.54% of exhaust waste heat can be converted. This results in better engine efficiency and fuel consumption on a global scale by gaining an average of 1 114.98 Mb and 1 126.63 Mb of petrol and diesel respectively from 2020 to 2040. It can combat global warming by recovering 56.78 1 011 MJ and 64.65 1 011 MJ of heat rejected from petrol and diesel engines, respectively. A case study of a Volkswagen Citi Golf 1.3i is considered, as it is a popular vehicle in South Africa. This idea can be applied to new-design hybrid vehicles that can use the waste heat to charge the batteries when the engine operates on fossil fuel. Advisors/Committee Members: Sharifpur, Mohsen (advisor), Meyer, Josua P. (coadvisor).

Subjects/Keywords: UCTD; Waste heat recovery; Thermal efficiency; Rankine cycle; Global warming

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Katamba, K. (2016). Investigation into waste heat to work in thermal systems in order to gain more efficiency and less environmental defect. (Masters Thesis). University of Pretoria. Retrieved from http://hdl.handle.net/2263/61300

Chicago Manual of Style (16^th Edition):

Katamba, Kanwayi. “Investigation into waste heat to work in thermal systems in order to gain more efficiency and less environmental defect.” 2016. Masters Thesis, University of Pretoria. Accessed February 27, 2021. http://hdl.handle.net/2263/61300.

MLA Handbook (7^th Edition):

Katamba, Kanwayi. “Investigation into waste heat to work in thermal systems in order to gain more efficiency and less environmental defect.” 2016. Web. 27 Feb 2021.

Vancouver:

Katamba K. Investigation into waste heat to work in thermal systems in order to gain more efficiency and less environmental defect. [Internet] [Masters thesis]. University of Pretoria; 2016. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/2263/61300.

Council of Science Editors:

Katamba K. Investigation into waste heat to work in thermal systems in order to gain more efficiency and less environmental defect. [Masters Thesis]. University of Pretoria; 2016. Available from: http://hdl.handle.net/2263/61300

KTH

26. Kumari, Epa. Analysis of Building Envelops to Optimize Energy Efficiency as per Code of Practice for Energy Efficient Buildings in Sri Lanka - 2008.

Degree: Applied Thermodynamics and Refrigeration, 2012, KTH

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-117984

► Residential and commercial buildings consume approximately 20% of the global energy generation. This value is continuously growing and the governments across the globe have… (more)

Subjects/Keywords: Building Envelops; Optimize Energy Efficiency; Overall Thermal Transfer Value

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APA (6^th Edition):

Kumari, E. (2012). Analysis of Building Envelops to Optimize Energy Efficiency as per Code of Practice for Energy Efficient Buildings in Sri Lanka - 2008. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-117984

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kumari, Epa. “Analysis of Building Envelops to Optimize Energy Efficiency as per Code of Practice for Energy Efficient Buildings in Sri Lanka - 2008.” 2012. Thesis, KTH. Accessed February 27, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-117984.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kumari, Epa. “Analysis of Building Envelops to Optimize Energy Efficiency as per Code of Practice for Energy Efficient Buildings in Sri Lanka - 2008.” 2012. Web. 27 Feb 2021.

Vancouver:

Kumari E. Analysis of Building Envelops to Optimize Energy Efficiency as per Code of Practice for Energy Efficient Buildings in Sri Lanka - 2008. [Internet] [Thesis]. KTH; 2012. [cited 2021 Feb 27]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-117984.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kumari E. Analysis of Building Envelops to Optimize Energy Efficiency as per Code of Practice for Energy Efficient Buildings in Sri Lanka - 2008. [Thesis]. KTH; 2012. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-117984

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

27. Cetin, Kristen Sara. Smart technology enabled residential building energy use and peak load reduction and their effects on occupant thermal comfort.

Degree: PhD, Civil Engineering, 2015, University of Texas – Austin

URL: http://hdl.handle.net/2152/30516

► Residential buildings in the United States are responsible for the consumption of 38% of electricity, and for much of the fluctuations in the power demands… (more)

▼ Residential buildings in the United States are responsible for the consumption of 38% of electricity, and for much of the fluctuations in the power demands on the electric grid, particularly in hot climates. Residential buildings are also where occupants spend nearly 69% of their time. As “smart” technologies, including electric grid-connected devices and home energy management systems are increasingly available and installed in buildings, this research focuses on the use of these technologies combined with available energy use data in accomplishing three main objectives. The research aims to: (a) better understand how residential buildings currently use electricity, (b) evaluate the use of these smart technologies and data to reduce buildings’ electricity use and their contribution to peak loads, and (c) develop a methodology to assess the impacts of these operational changes on occupant thermal comfort. Specifically this study focuses on two of the most significant electricity consumers in residential buildings: large appliances, including refrigerators, clothes washers, clothes dryers and dishwashers, and heating, ventilation and air conditioning (HVAC) systems. First, to develop an improved understanding of current electricity use patterns of large appliances and residential HVAC systems, this research analyzes a large set of field-collected data. This dataset includes highly granular electricity consumption information for residential buildings located in a hot and humid climate. The results show that refrigerators have the most reliable and consistent use, while the three user-dependent appliances varied more greatly among houses and by time-of-day. In addition, the daily use patterns of appliances vary in shape depending on a number of factors, particularly whether or not the occupants work from home, which contrasts with common residential building energy modeling assumptions. For the all-air central HVAC systems studied, the average annual HVAC duty cycle was found to be approximately 20%, and varied significantly depending on the season, time of day, and type of residential building. Duty cycle was also correlated to monthly energy use. This information provides an improvement to previously assumed values in indoor air modeling studies. Overall, the work presented here enhances the knowledge of how the largest consumers of residential buildings, large appliances and HVAC, operate and use energy, and identifies influential factors that affect these use patterns. The methodologies developed can be applied to determine use patterns for other energy consuming devices and types of buildings, to further expand the body of knowledge in this area. Expanding on this knowledge of current energy use, smart large appliances and residential HVAC systems are investigated for use in reducing peak electric grid loads, and building energy use, respectively. This includes a combination of laboratory testing, field-collected data, and modeling. For appliance peak load reduction, refrigerators are found to have a good… Advisors/Committee Members: Novoselac, Atila (advisor), Webber, Michael (committee member), Blackhurst, Michael (committee member), Tabares, Paulo (committee member), Manuel, Lance (committee member), Corsi, Richard (committee member).

Subjects/Keywords: Building energy efficiency; Smart buildings; Peak load reduction; Thermal comfort

11 more images…

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APA (6^th Edition):

Cetin, K. S. (2015). Smart technology enabled residential building energy use and peak load reduction and their effects on occupant thermal comfort. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/30516

Chicago Manual of Style (16^th Edition):

Cetin, Kristen Sara. “Smart technology enabled residential building energy use and peak load reduction and their effects on occupant thermal comfort.” 2015. Doctoral Dissertation, University of Texas – Austin. Accessed February 27, 2021. http://hdl.handle.net/2152/30516.

MLA Handbook (7^th Edition):

Cetin, Kristen Sara. “Smart technology enabled residential building energy use and peak load reduction and their effects on occupant thermal comfort.” 2015. Web. 27 Feb 2021.

Vancouver:

Cetin KS. Smart technology enabled residential building energy use and peak load reduction and their effects on occupant thermal comfort. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2015. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/2152/30516.

Council of Science Editors:

Cetin KS. Smart technology enabled residential building energy use and peak load reduction and their effects on occupant thermal comfort. [Doctoral Dissertation]. University of Texas – Austin; 2015. Available from: http://hdl.handle.net/2152/30516

Universidade do Rio Grande do Sul

28. Hackenhaar, William. Avaliação da eficiência térmica e de fusão na soldagem MAG em diferentes geometrias de juntas.

Degree: 2016, Universidade do Rio Grande do Sul

URL: http://hdl.handle.net/10183/141208

►

O presente trabalho objetiva estudar a eficiência térmica do arco elétrico e de fusão para o processo de soldagem MAG, do inglês Metal Active Gas,… (more)

▼

O presente trabalho objetiva estudar a eficiência térmica do arco elétrico e de fusão para o processo de soldagem MAG, do inglês Metal Active Gas, em diferentes geometrias de juntas soldadas. As soldas foram feitas inicialmente em um calorímetro de fluxo contínuo de água, seguidas de deposição de cordão sobre chapa e soldagem de juntas em ângulo “T”, sempre em aço carbono. A metodologia de projeto de experimentos Box-Behnken foi empregada para a avaliação da influência da variação dos parâmetros de soldagem (tensão, velocidade de alimentação do eletrodo e velocidade de soldagem) nas eficiências, dentro do modo de transferência metálica por curto circuito. Diferentes equações propostas na literatura para o cálculo da eficiência de fusão são comparadas. Para a adequada aquisição da eficiência térmica pelo calorímetro, preliminarmente é avaliada a influência da vazão de água e da geometria na entrada de um calorímetro de fluxo contínuo sobre a eficiência térmica do arco. O procedimento experimental consiste em testar diferentes vazões de água e três configurações geométricas na região de entrada de água no calorímetro: com rolha reta, com difusor cônico e com obstáculo. Os experimentos foram planejados e os resultados avaliados com base na análise de variância estatística de um único fator, no caso, a vazão de água na entrada do calorímetro. A maior eficiência térmica média de 80,5% foi obtida para a vazão de 4 l/min, com baixo erro estatístico, utilizando rolha de entrada com geometria de difusor cônico. O modelo em que o fluxo entra diretamente no tubo apresentou todos os valores de eficiência térmica do arco com pequeno decréscimo numérico se comparados com o difusor cônico, enquanto a rolha com obstáculo apresentou elevado erro estatístico. Com base nos resultados descritos, a eficiência térmica do arco elétrico foi avaliada com a vazão de 4 l/min para o projeto de experimentos Box-Behnken, os valores obtidos estão na faixa de 72 a 82% conforme a combinação dos parâmetros de soldagem. A velocidade de soldagem e a tensão do arco se mostraram como os parâmetros de maior influência na eficiência térmica do arco. Os resultados relativos à eficiência de fusão indicam maiores valores nas soldas realizadas no calorímetro e por simples deposição sobre chapa. A junta T apresentou os menores valores de eficiência de fusão e de diluição para todos os casos. O parâmetro de maior influência na eficiência de fusão foi a corrente de soldagem.

The main aim of the present work is to study arc thermal efficiency and fusion efficiency to Gas Metal Arc Welding – GMAW, using different joint geometries. At first, the welds were performed in a continuous water flow calorimeter, followed by bead on plate and T – joint deposits. The Box-Behken design of experiments methodology was used to analyze the effect of welding parameters (arc voltage, wire feed speed and welding speed) on the efficiencies, when using short circuit metal transfer. The results of the fusion efficiency calculation were compared using different equations found in…

Advisors/Committee Members: Mazzaferro, Jose Antonio Esmerio.

Subjects/Keywords: Calorímetro; Fusion efficiency; Calorimeter; Soldagem MIG/MAG; Arc thermal efficiency; Transferencia de calor; GMAW; Fusão; Box-behnken design; Juntas soldadas

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Hackenhaar, W. (2016). Avaliação da eficiência térmica e de fusão na soldagem MAG em diferentes geometrias de juntas. (Thesis). Universidade do Rio Grande do Sul. Retrieved from http://hdl.handle.net/10183/141208

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Hackenhaar, William. “Avaliação da eficiência térmica e de fusão na soldagem MAG em diferentes geometrias de juntas.” 2016. Thesis, Universidade do Rio Grande do Sul. Accessed February 27, 2021. http://hdl.handle.net/10183/141208.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Hackenhaar, William. “Avaliação da eficiência térmica e de fusão na soldagem MAG em diferentes geometrias de juntas.” 2016. Web. 27 Feb 2021.

Vancouver:

Hackenhaar W. Avaliação da eficiência térmica e de fusão na soldagem MAG em diferentes geometrias de juntas. [Internet] [Thesis]. Universidade do Rio Grande do Sul; 2016. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10183/141208.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hackenhaar W. Avaliação da eficiência térmica e de fusão na soldagem MAG em diferentes geometrias de juntas. [Thesis]. Universidade do Rio Grande do Sul; 2016. Available from: http://hdl.handle.net/10183/141208

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

North-West University

29. Van Rooyen, Kathryn Marie-Louise. The effect of condenser backpressure on station thermal efficiency : Grootvlei Power Station as a case study / Kathryn Marie-Louise van Rooyen .

Degree: 2014, North-West University

URL: http://hdl.handle.net/10394/15719

► Grootvlei Power Station’s thermal efficiency had been on a steady declining trend since it was re-commissioned in 2008, which had tremendous financial implications to the… (more)

▼ Grootvlei Power Station’s thermal efficiency had been on a steady declining trend since it was re-commissioned in 2008, which had tremendous financial implications to the company at the time of writing. The main contributory factor to the thermal efficiency losses was identified to be the condenser backpressure losses that the station was experiencing. This loss was responsible for approximately 17% of the total efficiency losses. Therefore an investigation was conducted to determine the potential impact of the condenser backpressure loss on the thermal efficiency and the financial implications thereof. The deliverables were to determine the cause of the condenser backpressure loss and propose possible resolutions, to quantify the financial effect and to produce a cost benefit analysis in order to justify certain corrective actions. Grootvlei Power Station is one of the older power stations in South Africa and it was used as the first testing facility for dry-cooling in South Africa. It consists of six 200MW units, two of which are dry-cooled units. In 1990 it was mothballed and due to rising power demands in South Africa, it was re-commissioned in 2008. Thermal efficiency has been playing a great role due to the power constraints and therefore it was deemed necessary to conduct this study. The approach that was used was one of experimental and quantitative research and analyses, incorporating deductive reasoning in order to test various hypotheses of factors that could have been contributing to the backpressure losses. In order to do so, a logic diagram was designed which could be used to aid in the identification of possible causes of the condenser backpressure losses. The logic diagram was able to identify whether the problem had to do with the cooling tower or the condenser. It was able to identify which area on the condenser was defective i.e. whether the pumps were not performing, or whether the air ejectors were not performing. It was also able to indicate whether the inefficiency was due to air ingress or fouling. Alongside the logic diagram, a condenser efficiency analysis was used in order to strengthen and improve on the investigation. This analysis was able to identify whether the condenser was experiencing fouling conditions, air ingress, passing valves or low cooling water flow. After the investigation commenced, it was decided to focus on the two largest contributing units since the largest contributor was a dry-cooled unit and the second largest contributor was a wet-cooled unit, thus some comparison between the units was incorporated. The condenser efficiency analysis on Unit 3 (wet-cooled unit) indicated a low cooling water flow, fouling as well as air ingress. The logic diagram indicated poor cooling tower performance, high air ingress as well as fouling. Further tests and analyses as well as visual inspections confirmed these phenomena and condenser fouling was identified to be the largest contributor to the backpressure loss on this unit. The condenser efficiency analysis on Unit 6…

Subjects/Keywords: Condenser performance; Thermal efficiency; Temperature gradient; Terminal temperature difference; Condensate depression; Temperature rise; Condenser efficiency analysis; Cooling tower performance

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APA (6^th Edition):

Van Rooyen, K. M. (2014). The effect of condenser backpressure on station thermal efficiency : Grootvlei Power Station as a case study / Kathryn Marie-Louise van Rooyen . (Thesis). North-West University. Retrieved from http://hdl.handle.net/10394/15719

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Van Rooyen, Kathryn Marie-Louise. “The effect of condenser backpressure on station thermal efficiency : Grootvlei Power Station as a case study / Kathryn Marie-Louise van Rooyen .” 2014. Thesis, North-West University. Accessed February 27, 2021. http://hdl.handle.net/10394/15719.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Van Rooyen, Kathryn Marie-Louise. “The effect of condenser backpressure on station thermal efficiency : Grootvlei Power Station as a case study / Kathryn Marie-Louise van Rooyen .” 2014. Web. 27 Feb 2021.

Vancouver:

Van Rooyen KM. The effect of condenser backpressure on station thermal efficiency : Grootvlei Power Station as a case study / Kathryn Marie-Louise van Rooyen . [Internet] [Thesis]. North-West University; 2014. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10394/15719.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Van Rooyen KM. The effect of condenser backpressure on station thermal efficiency : Grootvlei Power Station as a case study / Kathryn Marie-Louise van Rooyen . [Thesis]. North-West University; 2014. Available from: http://hdl.handle.net/10394/15719

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU

30. Wang, Wei-Fan. Study on energy saving of a thermal oxidizer system.

Degree: Master, Environmental Engineering, 2016, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0527116-092157

► This study investigated the treatment of volatile organic compounds (VOCs) emitted from resin production at a factory in Yong-An Industrial Park, Taiwan. Originally treated with… (more)

Subjects/Keywords: direct-fired thermal oxidizer; energy conservation; destruction and removal efficiency; regenerative thermal oxidizer; volatile organic compound

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APA (6^th Edition):

Wang, W. (2016). Study on energy saving of a thermal oxidizer system. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0527116-092157

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wang, Wei-Fan. “Study on energy saving of a thermal oxidizer system.” 2016. Thesis, NSYSU. Accessed February 27, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0527116-092157.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wang, Wei-Fan. “Study on energy saving of a thermal oxidizer system.” 2016. Web. 27 Feb 2021.

Vancouver:

Wang W. Study on energy saving of a thermal oxidizer system. [Internet] [Thesis]. NSYSU; 2016. [cited 2021 Feb 27]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0527116-092157.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wang W. Study on energy saving of a thermal oxidizer system. [Thesis]. NSYSU; 2016. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0527116-092157

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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Open Access Theses and Dissertations