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KTH
1.
Quintana, Julio.
Small-scale wave motion energy generator : Technical & Business parallel development.
Degree: Heat and Power Technology, 2015, KTH
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-158975 
► This MSc thesis was a project performed in a start-up that develops sustainable devices to exploit renewable energies, specifically in the field of energy…
(more)
▼ This MSc thesis was a project performed in a start-up that develops sustainable devices to exploit renewable energies, specifically in the field of energy harvesting in small scale. The objective of the thesis is to demonstrate the importance of developing the technical side of a project together with the development of the market. The idea is to enhance the success possibilities and work to get to the market as fast as possible with a minimum sellable product using the resources as efficiently as possible. The market analysis was the first step to be performed to understand what the start-up was getting into, at the beginning it was clear that the generator should be targeted to power remote applications that require small amounts of energy and a market that is not suitable for present technologies such as solar PV or micro wind turbines. After this a series of potential markets were identified in order to limit the research and three opportunities were selected. The buoy market was chosen, it has several sub-markets and the AtoN buoys, Fishing buoys and Meteorological buoys were considered the most important and suitable ones. Once the market was defined, the needs of the clients and users were discovered through research in the form of interviews and bibliographical research. Later on an experimental rig was used to test several models of the prototype under different parameters to select one that was close to what was demanded and that can actually be built. This approach was useful to dedicate resources efficiently, specially time and money. The last part of the thesis was to propose a sustainable business model describing a go-to-market strategy that considered both the limitations of the technology and the testing performed in the scope of this project and the expectations of the market for the proposed product. The methodology was a mixed use of business tools learned in the courses and the experiences of the people who were close to the start-up. There is a final reflection at the conclusions that describe the day-to-day of the start-up and the experiences learned as well as the recommendations for future work.
Subjects/Keywords: start-up; innovation; entrepreneurship; small scale energy generation; sea waves; buoys
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APA (6th Edition):
Quintana, J. (2015). Small-scale wave motion energy generator : Technical & Business parallel development. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-158975
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Quintana, Julio. “Small-scale wave motion energy generator : Technical & Business parallel development.” 2015. Thesis, KTH. Accessed March 07, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-158975.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Quintana, Julio. “Small-scale wave motion energy generator : Technical & Business parallel development.” 2015. Web. 07 Mar 2021.
Vancouver:
Quintana J. Small-scale wave motion energy generator : Technical & Business parallel development. [Internet] [Thesis]. KTH; 2015. [cited 2021 Mar 07].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-158975.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Quintana J. Small-scale wave motion energy generator : Technical & Business parallel development. [Thesis]. KTH; 2015. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-158975
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Stellenbosch University
2.
Overett, Jonathan Stephen.
Assessment of the harmonic behaviour of a utility-scale photovoltaic plant.
Degree: MScEng, Electrical and Electronic Engineering, 2017, Stellenbosch University
URL: http://hdl.handle.net/10019.1/102869
► ENGLISH ABSTRACT: The rapidly increasing deployment of utility-scale solar photovoltaic (PV) plants worldwide presents new technical challenges including the risk of unacceptably high harmonic voltage…
(more)
▼ ENGLISH ABSTRACT: The rapidly increasing deployment of utility-scale solar photovoltaic (PV) plants worldwide presents new technical challenges including the risk of unacceptably high harmonic voltage distortion in the utility network. PV plants affect the harmonic voltage distortion at their point of common coupling primarily by two distinct mechanisms:
generation of harmonic currents due to switching action of the inverters and introduction of series and parallel resonances caused by connection of the plant to the network. The objective of this study is to investigate the harmonic behaviour of utility-scale PV plants based on the case-study of a 75 MW PV plant in the Northern Cape province of South Africa.
In this work, a harmonic simulation model of a PV plant is developed in DIgSILENT PowerFactory which represents the passive network components with sufficient accuracy to study the frequency response over the harmonic frequency band
from 50 to 2500 Hz. 10-minute and 3-second aggregated harmonic measurement data and event-triggered waveform data were captured over a 12-day period using an IEC 61000-4-30 Class A
power quality meter installed at the plant’s 132 kV point of connection (POC). A quality assessment of harmonic measurement data shows that the accuracy of harmonic voltage and current measurements are likely to be significantly affected by quantisation and transducer error for even and higher-order harmonics. Analysis of the 3-second aggregated harmonic quantities indicates that their fluctuation during each 10-minute period is sufficiently small that the 10-minute average values adequately approximate the short-term and long-term behaviour of the plant.
The harmonic behaviour of the plant is investigated by considering the relationship between harmonic voltage and current emissions and active
power, reactive
power and time of day. Certain harmonic voltages increase with increasing plant active
power output whilst others decrease but all harmonic currents remain constant or increase with increasing active
power. It was not possible to quantify the relative impact of active and reactive
power variation as the plant operates in voltage control mode. Brief periods of high harmonic current distortion were noted during start up and shut down of the plant. High harmonic currents at the 23rd harmonic order correspond with a series resonance identified in the model thus validating the POC frequency sweep simulation.
A comparative analysis of different published methods for assessment of the harmonic emissions contribution of the PV plant is performed. All methods show similar trends in identifying dominant harmonics and general harmonic behaviour but the magnitudes of the calculated emissions differ significantly in some instances. Where accurate frequency sweep data of the utility network and phasor measurement data are both available, the plant model enables application of the harmonic vector method to discriminate between utility and plant contributions. Simulated voltage emissions based using the…
Advisors/Committee Members: Vermeulen, Hendrik Johannes, Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering..
Subjects/Keywords: Photovoltaic power generation; Harmonics (Electric waves); Current balances (Electric meters)
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APA (6th Edition):
Overett, J. S. (2017). Assessment of the harmonic behaviour of a utility-scale photovoltaic plant. (Masters Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/102869
Chicago Manual of Style (16th Edition):
Overett, Jonathan Stephen. “Assessment of the harmonic behaviour of a utility-scale photovoltaic plant.” 2017. Masters Thesis, Stellenbosch University. Accessed March 07, 2021.
http://hdl.handle.net/10019.1/102869.
MLA Handbook (7th Edition):
Overett, Jonathan Stephen. “Assessment of the harmonic behaviour of a utility-scale photovoltaic plant.” 2017. Web. 07 Mar 2021.
Vancouver:
Overett JS. Assessment of the harmonic behaviour of a utility-scale photovoltaic plant. [Internet] [Masters thesis]. Stellenbosch University; 2017. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/10019.1/102869.
Council of Science Editors:
Overett JS. Assessment of the harmonic behaviour of a utility-scale photovoltaic plant. [Masters Thesis]. Stellenbosch University; 2017. Available from: http://hdl.handle.net/10019.1/102869
3.
Κιμουλάκης, Νικόλαος.
Ανάπτυξη και σύγκριση εναλλακτικών συζευγμένων ηλεκτρομηχανικών συστημάτων για ηλεκτροπαραγωγή από θαλάσσιο κυματισμό.
Degree: 2010, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)
URL: http://hdl.handle.net/10442/hedi/18842
► The present thesis, concerns the design procedure, modeling and implementation of the optimal configuration of the electric part of an experimental power plant, as well…
(more)
▼ The present thesis, concerns the design procedure, modeling and implementation of the optimal configuration of the electric part of an experimental power plant, as well as the study of alternative generating unit configurations in the case of power generation from sea waves. An experimental power plant for power generation from sea waves was constructed on Psitalia in the frame of the research project PAVET 00BE142 entitled “Experimental Plant for Power Generation from Sea Waves”. The entire plant consisted of three similar units, each one involving a coupled hydraulic - mechanical - electrical system for wave energy extraction. Moreover, the case of linear synchronous generator with permanent magnets (LPMSG), as alternative unit for electric power generation from sea waves, has been studied. A particular, linear generator with permanent magnets was designed, accounting the features of the sea wave and the behaviour of the floating buoy. Appropriate coupled electromagnetic-mechanical-hydraulic models incorporating Finite Element Analysis (FEA) have been developed, enabling a dynamic simulation of the whole system performance involving a detailed field analysis of the permanent magnet linear generator. Also, a new hybrid simulation model, incorporating finite elements (FE) combined with analytical solution (macroelement) in the air gap area accounting for skewed magnets in linear generators (LPMSG) have been developed. The results of simulation of performance combined with the experimental measurements, illustrate the suitability of the developed models in applications for power generation from sea waves.
Στα πλαίσια της παρούσας εργασίας διερευνήθηκαν οι πιθανές εναλλακτικές διαμορφώσεις συζευγμένων ηλεκτρομηχανικών συστημάτων, κατάλληλων για την παραγωγή ηλεκτρικής ενέργειας από τον θαλάσσιο κυμάτισμά. Επίσης αναπτύχθηκαν κατάλληλα αριθμητικά μοντέλα για την προσομοίωση της λειτουργίας των απαιτούμενων συζευγμένων υποσυστημάτων (υδραυλικού - μηχανικού - ηλεκτρικού), για την σύνθεση μιας μονάδας ηλεκτροπαραγωγής με εκμετάλλευση την ενέργειας του θαλάσσιου κυματισμού. Τα μοντέλα εφαρμόστηκαν σε επιδεικτικό πειραματικό σταθμό μετατροπής της ενέργειας των θαλάσσιών κυμάτων σε ηλεκτρική, που κατασκευάστηκε στην Ψυτάλλεια στα πλαίσια του ερευνητικού έργου ΠΑΒΕΤ 00ΒΕ142, με τίτλο «Πειραματικός σταθμός παραγωγής ηλεκτρικής ενέργειας από θαλάσσιο κυμάτισμά». Ως εναλλακτικοί τύποι γεννητριών που μπορούν να χρησιμοποιηθούν για την ηλεκτροπαραγωγή από θαλάσσιο κυμάτισμά, εξετάστηκαν η γεννήτρια συνεχούς ρεύματος ξένης διέγερσης και η γραμμική γεννήτρια μονίμων μαγνητών. Τα δύο είδη γεννητριών, απαιτούν πλήρη ανάλυση της κατανομής του μαγνητικού τους πεδίου, καθώς ο εφαρμοζόμενος έλεγχος με στόχο την βελτιστοποίηση της παραγόμενης ενέργειας ακόμη και από κυμάτισμά χαμηλού ενεργειακού περιεχομένου, μπορεί να οδηγήσει σε βραχυχρόνια εμφάνιση φαινομένων τοπικού κορεσμού στο μαγνητικό υλικό των γεννητριών. Για την ανάλυση της κατανομής του μαγνητικού πεδίου γραμμικών γεννητριών μονίμων μαγνητών, αναπτύχθηκε μια νέα μεικτή τεχνική…
Subjects/Keywords: Ηλεκτροπαραγωγή από θαλάσσιο κυματισμό; Συζευγμένα μοντέλα προσομοίωσης; Μέθοδος πεπερασμένων στοιχείων; Μεικτή τεχνική πεπερασμένων στοιχείων - αναλυτικών λύσεων; Γραμμική γεννήτρια μονίμων μαγνητών; Κλίση μαγνητών; Power generation from sea waves; Wave energy extraction; Coupled simulation models; Finite elements method; Special air gap macroelement; Linear permanent magnet generator; Magnet skew
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APA (6th Edition):
Κιμουλάκης, . . (2010). Ανάπτυξη και σύγκριση εναλλακτικών συζευγμένων ηλεκτρομηχανικών συστημάτων για ηλεκτροπαραγωγή από θαλάσσιο κυματισμό. (Thesis). National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Retrieved from http://hdl.handle.net/10442/hedi/18842
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Κιμουλάκης, Νικόλαος. “Ανάπτυξη και σύγκριση εναλλακτικών συζευγμένων ηλεκτρομηχανικών συστημάτων για ηλεκτροπαραγωγή από θαλάσσιο κυματισμό.” 2010. Thesis, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Accessed March 07, 2021.
http://hdl.handle.net/10442/hedi/18842.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Κιμουλάκης, Νικόλαος. “Ανάπτυξη και σύγκριση εναλλακτικών συζευγμένων ηλεκτρομηχανικών συστημάτων για ηλεκτροπαραγωγή από θαλάσσιο κυματισμό.” 2010. Web. 07 Mar 2021.
Vancouver:
Κιμουλάκης . Ανάπτυξη και σύγκριση εναλλακτικών συζευγμένων ηλεκτρομηχανικών συστημάτων για ηλεκτροπαραγωγή από θαλάσσιο κυματισμό. [Internet] [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2010. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/10442/hedi/18842.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Κιμουλάκης . Ανάπτυξη και σύγκριση εναλλακτικών συζευγμένων ηλεκτρομηχανικών συστημάτων για ηλεκτροπαραγωγή από θαλάσσιο κυματισμό. [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2010. Available from: http://hdl.handle.net/10442/hedi/18842
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Manitoba
4.
Campbell, Yanique.
The evolution of wind-driven surface waves in partial sea ice cover in the southern Beaufort Sea.
Degree: Environment and Geography, 2019, University of Manitoba
URL: http://hdl.handle.net/1993/34477
► Surface waves play an important role in how energy is transported and distributed to both sea ice and atmosphere in Arctic seas. The region of…
(more)
▼ Surface
waves play an important role in how energy is transported and distributed to both
sea ice and atmosphere in Arctic seas. The region of marginal
sea ice, termed the Marginal Ice Zone (MIZ), has been increasing alongside temperature, introducing even more open water spaces within the
sea ice field. Little research has focused on the development of
waves within these open water spaces, and how the wave field evolves under such restricted fetch environments. This study considers a set of observations collected using moorings
from ASL Environmental Sciences in the southern Beaufort
Sea. These observations suggest local wave development as the dominant source of wave energy tens of kilometers in the MIZ throughout the month of August. The significant wave heights (H_s) and peak periods (T_p) were kept low throughout the month, mainly remaining below a H_s of 0.6 m and a T_p of 6 s in
sea ice. At the end of the month, open water
waves were able to influence the wave characteristics and there were notable increases in both heights and periods. This study examines how the attenuation of such
waves by
sea ice differs
from the attenuation of open water
waves moving into the MIZ. The coherence and positive correlation between H_s and T_p were found to be predominant in the
sea ice field. This differs
from the classic attenuation of open water
waves in
sea ice where peak periods increase while wave heights decrease, producing a distinct negative relationship with distance in
sea ice. There was no preferential increase or lengthening of the dominant
waves under easterly and southerly winds where the wave fetches were long, and the wind speed was found to have limited influence on wave growth after development. Estimations of fetch using empirical relationships, supplemented by satellite imagery, indicate that the short fetches were the dominant factor in terms of wave growth, which indicates an evolution similar to open water
waves until they reach an
sea ice floe interface and are scattered, a process which depends greatly on the
sea ice type, size, rheology and the length of the
waves. The interplay among the
sea ice (size, structure and concentration) and the wind during a storm event provides an interesting look at the behavior of locally developed
waves and the transition to more open water characteristics and development as the
sea ice becomes eroded close to the end of the month. While
waves developed locally in
sea ice are expected to be fairly low compared to open water
waves, they play an important role in the fluxes of energy and momentum in the MIZ and the expansion of this region has implications for the overall energy balance in Arctic marine systems.
Advisors/Committee Members: Barber, David (Environment and Geography), Papakyriakou, Tim (Environment and Geography) (examiningcommittee), McCullough, Greg (Geological Sciences) (examiningcommittee).
Subjects/Keywords: Waves; Arctic Ocean; Sea ice
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APA ·
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APA (6th Edition):
Campbell, Y. (2019). The evolution of wind-driven surface waves in partial sea ice cover in the southern Beaufort Sea. (Masters Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/34477
Chicago Manual of Style (16th Edition):
Campbell, Yanique. “The evolution of wind-driven surface waves in partial sea ice cover in the southern Beaufort Sea.” 2019. Masters Thesis, University of Manitoba. Accessed March 07, 2021.
http://hdl.handle.net/1993/34477.
MLA Handbook (7th Edition):
Campbell, Yanique. “The evolution of wind-driven surface waves in partial sea ice cover in the southern Beaufort Sea.” 2019. Web. 07 Mar 2021.
Vancouver:
Campbell Y. The evolution of wind-driven surface waves in partial sea ice cover in the southern Beaufort Sea. [Internet] [Masters thesis]. University of Manitoba; 2019. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/1993/34477.
Council of Science Editors:
Campbell Y. The evolution of wind-driven surface waves in partial sea ice cover in the southern Beaufort Sea. [Masters Thesis]. University of Manitoba; 2019. Available from: http://hdl.handle.net/1993/34477
Uppsala University
5.
Gotthardsson, Björn.
Analysis and Evaluation of the Wavebox Wave Energy Converter.
Degree: Electricity, 2010, Uppsala University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-149364
► Increasing attention to climate change in combination with ever-growing energy consumption worldwide has boosted the demand for new green energy sources. Wave power is…
(more)
▼ Increasing attention to climate change in combination with ever-growing energy consumption worldwide has boosted the demand for new green energy sources. Wave power is developing in many different branches to become part of the new era of electricity production. This thesis deals with a wave power system in its primary stages of development. The system was investigated in order to estimate its potential to produce electric power from sea waves. It is a system consisting of a moored buoy to which the energy is transferred when the wave tilts the buoy in the pitch direction. Due to the increased pitch angle, an amount of liquid contained inside the buoy is allowed to flow via ramps to an upper container, from where it flows down through a hydroelectric turbine. A computer program was used to calculate the properties of the buoy in sea waves. Another program was written in MATLAB to simulate the movements in sea waves and from a set of given parameters calculate the power output. A brief economic study was made to determine if the power output was large enough for the concept to be of financial interest to any future investors. The results show that the wave power system produced 0.9 kW in a wave climate equal to that off the coast of Hanstholm, Denmark, and 1.6 kW in a wave climate off the coast of San Diego, USA. The economic study shows that the power output needed to be improved by a factor of at least five to have a chance of being economically viable. A number of enhancements were suggested to increase the power output of the system, and further investigation could be of use to improve the concept. The created computer simulation model, as well as the results in this thesis could be valuable in any future research on the concept.
Subjects/Keywords: Wave power; Wave energy; Wavebox; Sea waves; Vågkraft; Wavebox
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APA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gotthardsson, B. (2010). Analysis and Evaluation of the Wavebox Wave Energy Converter. (Thesis). Uppsala University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-149364
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Gotthardsson, Björn. “Analysis and Evaluation of the Wavebox Wave Energy Converter.” 2010. Thesis, Uppsala University. Accessed March 07, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-149364.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Gotthardsson, Björn. “Analysis and Evaluation of the Wavebox Wave Energy Converter.” 2010. Web. 07 Mar 2021.
Vancouver:
Gotthardsson B. Analysis and Evaluation of the Wavebox Wave Energy Converter. [Internet] [Thesis]. Uppsala University; 2010. [cited 2021 Mar 07].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-149364.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Gotthardsson B. Analysis and Evaluation of the Wavebox Wave Energy Converter. [Thesis]. Uppsala University; 2010. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-149364
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of New South Wales
6.
Vasanasong, Ekarin.
A technical approach to the harmonic modelling of grid-connected PV systems.
Degree: Electrical Engineering & Telecommunications, 2002, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/55271
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:37003/SOURCE01?view=true
Subjects/Keywords: Photovoltaic power generation; Harmonics (Electric waves); Thesis Digitisation Program
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APA ·
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MLA ·
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CSE |
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Manager
APA (6th Edition):
Vasanasong, E. (2002). A technical approach to the harmonic modelling of grid-connected PV systems. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/55271 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:37003/SOURCE01?view=true
Chicago Manual of Style (16th Edition):
Vasanasong, Ekarin. “A technical approach to the harmonic modelling of grid-connected PV systems.” 2002. Doctoral Dissertation, University of New South Wales. Accessed March 07, 2021.
http://handle.unsw.edu.au/1959.4/55271 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:37003/SOURCE01?view=true.
MLA Handbook (7th Edition):
Vasanasong, Ekarin. “A technical approach to the harmonic modelling of grid-connected PV systems.” 2002. Web. 07 Mar 2021.
Vancouver:
Vasanasong E. A technical approach to the harmonic modelling of grid-connected PV systems. [Internet] [Doctoral dissertation]. University of New South Wales; 2002. [cited 2021 Mar 07].
Available from: http://handle.unsw.edu.au/1959.4/55271 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:37003/SOURCE01?view=true.
Council of Science Editors:
Vasanasong E. A technical approach to the harmonic modelling of grid-connected PV systems. [Doctoral Dissertation]. University of New South Wales; 2002. Available from: http://handle.unsw.edu.au/1959.4/55271 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:37003/SOURCE01?view=true
7.
Eden, Jennifer Alane.
Optimum design of the Pelamis Wave Energy Converter.
Degree: MS, Mechanical Engineering, 2014, California State University – Sacramento
URL: http://hdl.handle.net/10211.9/2347
► As well as inflicting harm upon to the environment through the production of green house gases and harmful to people through fires, oil spills and…
(more)
▼ As well as inflicting harm upon to the environment through the production of green house gases and harmful to people through fires, oil spills and toxic ashes; fossil fuels are also a limited resource with a rising cost. Additionally, society as a whole has become completely dependent on the current energy supply
from fossil fuels. These contributing factors have led toward an increased interest in renewable clean energy. While some forms have existed for centuries, such as hydropower, other forms are in their developmental infancy, including ocean energy. Wave energy converters (WECs) harness the kinetic and potential energies in the ocean
waves and convert them to useable electric energy via either turbines or hydraulic pumps. Although several different types of WECs are being developed today, only a few models have made it to the commercial market. The first to do so was the Pelamis P1model by Pelamis Wave
Power Ltd. Since then, Pelamis Wave
Power has developed a new and improved Pelamis P2 model.
The purpose of this thesis is to determine the optimum size and number of tubes for the Pelamis P2 WEC. The overall length is kept constant at 180 m in an attempt to keep standardized the amount of raw materials used in the construction of the WEC. Simulations using the following software are performed to study the energy absorption at the nodes between the tubes: ANSYS Workbench, Design Modeler, and AQWA. The control model is the current P2 WEC in production. It consists of five tubes, each 36 m long with a 4 m diameter. The first set of tests is conducted to reduce the number of tubes and increase their length. The second set of tests is used to increase the number of tubes and decrease their length. The third set of tests select the optimum tube number between the control, first and second test sets and vary the size of tubes
from small to large, large to small, small on the ends and large in the center, and large on the ends and small in the center. After a systematic study, the optimum size of the Pelamis P2 is recommended.
Advisors/Committee Members: Zhou, Dongmei.
Subjects/Keywords: Ocean Energy; Wave Energy; Power from Ocean Waves; Alternative Energy
…FROM OCEAN WAVES
The power obtained from ocean waves can be expressed in many forms but is… …energy source; the available power from the waves varies
in time in an uncontrollable manner… …devices capture seawater from incident waves in a reservoir above sea level.
This water is then… …A wind sea state is the state of waves under the direct influence of the
wind and are very… …the power stored in ocean waves the energy density must be
determined. Surface gravity waves…
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APA (6th Edition):
Eden, J. A. (2014). Optimum design of the Pelamis Wave Energy Converter. (Masters Thesis). California State University – Sacramento. Retrieved from http://hdl.handle.net/10211.9/2347
Chicago Manual of Style (16th Edition):
Eden, Jennifer Alane. “Optimum design of the Pelamis Wave Energy Converter.” 2014. Masters Thesis, California State University – Sacramento. Accessed March 07, 2021.
http://hdl.handle.net/10211.9/2347.
MLA Handbook (7th Edition):
Eden, Jennifer Alane. “Optimum design of the Pelamis Wave Energy Converter.” 2014. Web. 07 Mar 2021.
Vancouver:
Eden JA. Optimum design of the Pelamis Wave Energy Converter. [Internet] [Masters thesis]. California State University – Sacramento; 2014. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/10211.9/2347.
Council of Science Editors:
Eden JA. Optimum design of the Pelamis Wave Energy Converter. [Masters Thesis]. California State University – Sacramento; 2014. Available from: http://hdl.handle.net/10211.9/2347
Virginia Tech
8.
Hamm Jr, David Wesley.
Conceptual Design of a Battery Pack for Use in a Mobile Hybridized Power Generation System.
Degree: MS, Mechanical Engineering, 2013, Virginia Tech
URL: http://hdl.handle.net/10919/23894
► Mobile generation platforms are very common among both military and civilian applications. However, in military applications getting fuel to the front lines can come at…
(more)
▼ Mobile
generation platforms are very common among both military and civilian applications. However, in military applications getting fuel to the front lines can come at a very high cost. This cost is both financial, costing upwards of hundreds of dollars a gallon, and human, with resupply convoys being the leading cause of casualties in today's warfront. Diesel generators operate much more efficiently at higher loads, rather than the lower loads that the systems normally operate at. To improve fuel efficiency, a hybridized generator system is proposed. This system combines a standard generator with a large rechargeable battery pack. The addition of the battery pack allows for several unique
power scenarios to occur through
power generation. The battery pack functions to provide an efficient storage capability for the system. During times of excess load, the battery and generator work together. This allows for algorithms to manage the generator set to operate at peak efficiency while addressing load spikes. A system like this has been theoretically designed and a simulation has been developed to determine the impact over a standard system. Actual load cycle information
from military sources has been used to evaluate the concept. The results of the simulation show increase efficiency, in the low load scenarios, to more than double the standard generator efficiency.
Advisors/Committee Members: Wicks, Alfred L. (committeechair), Meehan, Kathleen (committee member), Bird, John P. (committee member).
Subjects/Keywords: Hybrid; power generation
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APA (6th Edition):
Hamm Jr, D. W. (2013). Conceptual Design of a Battery Pack for Use in a Mobile Hybridized Power Generation System. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/23894
Chicago Manual of Style (16th Edition):
Hamm Jr, David Wesley. “Conceptual Design of a Battery Pack for Use in a Mobile Hybridized Power Generation System.” 2013. Masters Thesis, Virginia Tech. Accessed March 07, 2021.
http://hdl.handle.net/10919/23894.
MLA Handbook (7th Edition):
Hamm Jr, David Wesley. “Conceptual Design of a Battery Pack for Use in a Mobile Hybridized Power Generation System.” 2013. Web. 07 Mar 2021.
Vancouver:
Hamm Jr DW. Conceptual Design of a Battery Pack for Use in a Mobile Hybridized Power Generation System. [Internet] [Masters thesis]. Virginia Tech; 2013. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/10919/23894.
Council of Science Editors:
Hamm Jr DW. Conceptual Design of a Battery Pack for Use in a Mobile Hybridized Power Generation System. [Masters Thesis]. Virginia Tech; 2013. Available from: http://hdl.handle.net/10919/23894
University of Texas – Austin
9.
Chirapongsananurak, Pisitpol.
Distribution circuit multi-time-scale simulation tool for wind turbine and photovoltaic integration analysis.
Degree: PhD, Electrical and Computer Engineering, 2016, University of Texas – Austin
URL: http://hdl.handle.net/2152/68247
► Power system phenomena can be characterized into three types according to their time scales. Firstly, electromagnetic transient phenomena, such as the effects of capacitor switching…
(more)
▼ Power system phenomena can be characterized into three types according to their time scales. Firstly, electromagnetic transient phenomena, such as the effects of capacitor switching and lightning strikes, have a time scale range of microseconds to milliseconds. Secondly, electromechanical transient phenomena, such as short-circuit faults on distribution circuits and inertial and frequency response of the
power system, have a time scale in the order of hundreds of milliseconds to tens of seconds. Lastly, quasi-steady-state phenomena, such as voltage regulation, voltage unbalance, and wind speed and solar irradiance variation, have a time scale of several minutes and longer. Currently, because the time scales of these phenomena vary greatly
from fractions of cycles to a few hours, only
power system simulation tools for specific time scales are available.
The objective of this research is to develop an integrated distribution circuit multi-time-scale simulation tool designed specifically for applications in wind turbine and photovoltaic (PV) integration analysis. This research contributes a multi-time-scale simulation tool for analysis and control of voltage regulation due to the variability of wind speed, solar irradiance, and load consumption, determining the maximum penetration of wind turbines and PVs, and sizing of energy storage for peak load shaving and
power variability control.
The proposed multi-time-scale simulation tool developed in MATLAB includes several distribution circuit components such as voltage sources, distribution lines, transformers, loads, capacitor banks, wind turbines, and PVs. Each equipment model in the proposed simulation tool consists of three models in different time scales, i.e., steady-state, electromechanical transient, and electromagnetic transient models. Therefore, the proposed tool is able to perform a long-term simulation involving
power system phenomena spreading across time scales. Because distribution circuits are usually unbalanced, the proposed tool employs distribution circuit models with all three phases represented. The test circuit used to demonstrate the multi-time-scale simulation approach is the IEEE four-node test feeder with wind turbines and PVs connected at the feeder end. The results show that the proposed multi-time-scale simulation tool is able to simulate and analyze long-term
power system phenomena spreading across time scales.
Advisors/Committee Members: Santoso, Surya (advisor), Baldick, Ross (committee member), Hallock, Gary A (committee member), Kwasinski, Alexis (committee member), Longoria, Raul G (committee member).
Subjects/Keywords: Distributed power generation; Power system modeling; Power system simulation; Solar power generation; Wind power generation
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APA (6th Edition):
Chirapongsananurak, P. (2016). Distribution circuit multi-time-scale simulation tool for wind turbine and photovoltaic integration analysis. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/68247
Chicago Manual of Style (16th Edition):
Chirapongsananurak, Pisitpol. “Distribution circuit multi-time-scale simulation tool for wind turbine and photovoltaic integration analysis.” 2016. Doctoral Dissertation, University of Texas – Austin. Accessed March 07, 2021.
http://hdl.handle.net/2152/68247.
MLA Handbook (7th Edition):
Chirapongsananurak, Pisitpol. “Distribution circuit multi-time-scale simulation tool for wind turbine and photovoltaic integration analysis.” 2016. Web. 07 Mar 2021.
Vancouver:
Chirapongsananurak P. Distribution circuit multi-time-scale simulation tool for wind turbine and photovoltaic integration analysis. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2016. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/2152/68247.
Council of Science Editors:
Chirapongsananurak P. Distribution circuit multi-time-scale simulation tool for wind turbine and photovoltaic integration analysis. [Doctoral Dissertation]. University of Texas – Austin; 2016. Available from: http://hdl.handle.net/2152/68247
University of Alberta
10.
HE, JINWEI.
Damping and Harmonic Control of DG Interfacing Power
Converters.
Degree: PhD, Department of Electrical and Computer
Engineering, 2013, University of Alberta
URL: https://era.library.ualberta.ca/files/8s45q958v
► A large number of renewable energy resources have been installed in the power distribution system in the form of distribution generation. To interconnect renewable energy…
(more)
▼ A large number of renewable energy resources have been
installed in the power distribution system in the form of
distribution generation. To interconnect renewable energy resources
to the utility power system, the power electronics converter is
often used as an efficient interface of distributed generation
units. However, the presence of power converters with high order LC
or LCL filters also introduces many harmonic and resonance problems
to power distribution systems. In addition, the growing application
of distributed nonlinear loads further aggravates the harmonic
distortions in the power distribution system.To solve these
problems, this thesis discusses interfacing converter control
method that actively mitigates the resonances and harmonics in
power distribution systems. The first objective is to provide
sufficient damping effect to distributed generation unit
interfacing converter filters through improved inverter control. To
realize this objective, this thesis conducts an in-depth
investigation on resonances in both a single inverter and multiple
parallel inverters. The virtual impedance based damping method is
proposed to realize better control of interfacing converters. The
second objective of this thesis is to compensate the impact of
nonlinear loads in the low voltage distribution system through
flexible operation of interfacing converters. In the scenario, the
interfacing converter essentially works as a virtual harmonic
filter. A number of power distribution system harmonic compensation
methods are proposed. They aim to realize better power quality of
future power electronics intensive power distribution
systems.
Subjects/Keywords: Power electronics; Distributed power generation; Power quality
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Manager
APA (6th Edition):
HE, J. (2013). Damping and Harmonic Control of DG Interfacing Power
Converters. (Doctoral Dissertation). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/8s45q958v
Chicago Manual of Style (16th Edition):
HE, JINWEI. “Damping and Harmonic Control of DG Interfacing Power
Converters.” 2013. Doctoral Dissertation, University of Alberta. Accessed March 07, 2021.
https://era.library.ualberta.ca/files/8s45q958v.
MLA Handbook (7th Edition):
HE, JINWEI. “Damping and Harmonic Control of DG Interfacing Power
Converters.” 2013. Web. 07 Mar 2021.
Vancouver:
HE J. Damping and Harmonic Control of DG Interfacing Power
Converters. [Internet] [Doctoral dissertation]. University of Alberta; 2013. [cited 2021 Mar 07].
Available from: https://era.library.ualberta.ca/files/8s45q958v.
Council of Science Editors:
HE J. Damping and Harmonic Control of DG Interfacing Power
Converters. [Doctoral Dissertation]. University of Alberta; 2013. Available from: https://era.library.ualberta.ca/files/8s45q958v
Delft University of Technology
11.
Naporowski, Remy (author).
Long waves in the North Sea: Distribution, generation and measurement methods.
Degree: 2020, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:833a3284-e37c-463f-91c9-9e705eaf94a6
► This report presents the results of a research concerning long waves in the North Sea. ‘Long waves’ in this research is a collective name for…
(more)
▼ This report presents the results of a research concerning long
waves in the North
Sea. ‘Long waves’ in this research is a collective name for various types of
waves that are longer than the well-known
sea-swell
waves, here referred to as ‘short waves’. Wave types that are referred to as long
waves are infragravity
waves, meteo-tsunami’s, seiches and tides. Besides their extensive length, they distinguish themselves
from regular
sea-swell
waves by the mechanisms responsible for their
generation and the scale of their impact. Whereas short
waves are generated by wind, long
waves are generated by short wave-group forcing, the breaking of short
waves nearshore and large atmospheric pressure variations. Long
waves play a crucial role in the processes of coastline erosion and the breaching of flood defenses, as well as in the formation of rip currents and seiches. These events can lead to severe damage to hydraulic structures and possibly even casualties. A better understanding of them is thus vital for coastal safety. Rijkswaterstaat has been collecting data regarding the occurrence of long
waves on the North
Sea for over a decade. Their measurement campaign started in a time when digital broadcasting signals and digital storage space were not well developed yet, making sending and storing the water surface elevation time-series not feasible. The data is therefore filtered by a FIR filter, reducing the size of the data, but also reducing the information that is contained in the data. All frequencies of approximately 0,0125 퐻푧 and higher are removed by the FIR filter. As a consequence a significant part of the infragravity signal is missing and it is not possible to perform a bispectral analysis (used to determine the bound long wave contribution). Nowadays, digital broadcasting signals and digital storage space have plenty of capacity to send and store the data, making the filter unnecessary. Analysis of the spatial- and temporal distribution of long
waves in the North
Sea, shows that the majority of long
waves have a yearly averaged significant wave height of 2,4 - 3,3 cm and a yearly averaged mean wave period of 125 to 140 cm. Based on data
from the full decade, a clear trend in the spatial distribution of long
waves cannot be distinguished, offshore and nearshore locations show approximately the same long wave properties. The seasonal analysis shows that the mean significant long wave height averaged out over all locations per season varies
from 2,8 cm during summer, 2,9 cm during spring, 3,3 cm during winter to 3,5 cm during fall. For the mean wave period, the mean value averaged out over all locations per season varies
from 127,5 s during summer, 128,1 s during spring, 135,6 s during winter to 136,3 s during fall. Predictions of the extreme wave conditions show that the significant wave height with a return period of 10.000 years (Dutch design condition for coastal flood defenses) are around 40-60 cm, although there is quite some uncertainty in these predictions. This uncertainty is due to a relatively short…
Advisors/Committee Members: Reniers, Ad (mentor), Tissier, Marion (graduation committee), Akrish, Gal (graduation committee), de Schipper, Matthieu (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: long waves; wave-group forcing; north sea; infragravity waves
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APA (6th Edition):
Naporowski, R. (. (2020). Long waves in the North Sea: Distribution, generation and measurement methods. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:833a3284-e37c-463f-91c9-9e705eaf94a6
Chicago Manual of Style (16th Edition):
Naporowski, Remy (author). “Long waves in the North Sea: Distribution, generation and measurement methods.” 2020. Masters Thesis, Delft University of Technology. Accessed March 07, 2021.
http://resolver.tudelft.nl/uuid:833a3284-e37c-463f-91c9-9e705eaf94a6.
MLA Handbook (7th Edition):
Naporowski, Remy (author). “Long waves in the North Sea: Distribution, generation and measurement methods.” 2020. Web. 07 Mar 2021.
Vancouver:
Naporowski R(. Long waves in the North Sea: Distribution, generation and measurement methods. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Mar 07].
Available from: http://resolver.tudelft.nl/uuid:833a3284-e37c-463f-91c9-9e705eaf94a6.
Council of Science Editors:
Naporowski R(. Long waves in the North Sea: Distribution, generation and measurement methods. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:833a3284-e37c-463f-91c9-9e705eaf94a6
12.
Lund, Björn.
Development and Evaluation of New Algorithms for the Retrieval of Wind and Internal Wave Parameters from Shipborne Marine Radar Data.
Degree: PhD, Applied Marine Physics (Marine), 2012, University of Miami
URL: https://scholarlyrepository.miami.edu/oa_dissertations/894
► The goal of this work is to develop and evaluate techniques for the retrieval of wind and internal wave (IW) information from marine X-band radar…
(more)
▼ The goal of this work is to develop and evaluate techniques for the retrieval of wind and internal wave (IW) information
from marine X-band radar data. While ocean wind measurements are crucial for the transfer of energy and momentum across the air-
sea interface, IWs play an important role in tidal energy transport. Marine radars work by transmitting microwave energy
from a rotating antenna that also measures the backscatter. The radar backscatter
from the
sea surface is controlled by the wind-generated small ripple
waves through the Bragg-scattering mechanism. Surface winds are thus the dominant factor for generating the radar backscatter. The varying surface current fields associated with IWs interact with the ripples, generating rough convergent and smooth divergent zones. Radars are capable of imaging such IW-induced surface signatures as bands of enhanced and weakened backscatter.
The advantage of radar-based wind information is that it is obtained
from a large area around the instrument. Marine radar wind data are therefore much less likely to be affected by platform-induced air flow distortions than in-situ measurements. Previous investigators have already demonstrated marine radar's suitability as a wind sensor [31, 30], however, these works have been limited to fixed-platform data. Here, the focus lies on shipborne marine radar data. Such data present the challenge that the existing wind streak-based approach for retrieving wind directions cannot be directly applied. This is because the wind streak signal may become obscured by the horizontal ship motion, since wind streaks become visible only after averaging over a sequence of radar images. In addition, moving platforms face a greater variability of conditions, which may further complicate a radar-based wind retrieval.
Grazing incidence HH-polarized (horizontal transmit and receive) X-band radar data exhibit a single intensity peak in upwind direction. To retrieve the wind direction, this work proposes a least-squares fit technique that identifies the upwind peak in the range-averaged backscatter dependency on the antenna look direction. This technique requires no motion correction and is therefore well-suited for shipborne data. In addition, it functions well even if sections of the radar field of view are masked. An empirical model function is derived to retrieve the wind speed
from the mean radar backscatter intensity. Data
from the U.S. Office of Naval Research (ONR) Impact of Typhoons on the Ocean in the Pacific (ITOP) experiment are used for a comparison between radar-based wind estimates and anemometer measurements. The two data sets show good agreement.
In addition, this work proposes a technique that uses geolocated marine radar data to extract wind streak information through a localized Radon transform. To compare streak- and upwind peak-based wind direction retrieval techniques, fixed and moving platform marine radar data
from the ONR-sponsored High Resolution Air-
Sea Interaction (Hi-Res) experiment are used. Wind directions obtained using the…
Advisors/Committee Members: Hans C. Graber, Roland Romeiser, Adrianus J. Reniers, Jochen Horstmann, Eric Terrill.
Subjects/Keywords: marine radar; microwave backscatter from the sea surface; internal waves; wind
…band radar return from the sea surface has long been regarded as a source
of noise for… …band radar
as an oceanographic instrument from first observations of sea clutter to the… …techniques from shipborne radar data are proposed. The gained
knowledge on the backscatter's… …0650,
N00014-08-1-0793, and N00014-09-1-0392.
Marine radar and anemometer data from the ONR… …High Resolution Air-Sea Interaction (Hi-Res) experiment were kindly made available…
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APA (6th Edition):
Lund, B. (2012). Development and Evaluation of New Algorithms for the Retrieval of Wind and Internal Wave Parameters from Shipborne Marine Radar Data. (Doctoral Dissertation). University of Miami. Retrieved from https://scholarlyrepository.miami.edu/oa_dissertations/894
Chicago Manual of Style (16th Edition):
Lund, Björn. “Development and Evaluation of New Algorithms for the Retrieval of Wind and Internal Wave Parameters from Shipborne Marine Radar Data.” 2012. Doctoral Dissertation, University of Miami. Accessed March 07, 2021.
https://scholarlyrepository.miami.edu/oa_dissertations/894.
MLA Handbook (7th Edition):
Lund, Björn. “Development and Evaluation of New Algorithms for the Retrieval of Wind and Internal Wave Parameters from Shipborne Marine Radar Data.” 2012. Web. 07 Mar 2021.
Vancouver:
Lund B. Development and Evaluation of New Algorithms for the Retrieval of Wind and Internal Wave Parameters from Shipborne Marine Radar Data. [Internet] [Doctoral dissertation]. University of Miami; 2012. [cited 2021 Mar 07].
Available from: https://scholarlyrepository.miami.edu/oa_dissertations/894.
Council of Science Editors:
Lund B. Development and Evaluation of New Algorithms for the Retrieval of Wind and Internal Wave Parameters from Shipborne Marine Radar Data. [Doctoral Dissertation]. University of Miami; 2012. Available from: https://scholarlyrepository.miami.edu/oa_dissertations/894
Nelson Mandela Metropolitan University
13.
Dobreva, Petja.
Energy yield modelling and analysis of photovoltaic systems in Namibia.
Degree: 2019, Nelson Mandela Metropolitan University
URL: http://hdl.handle.net/10948/39523
► Generation of electricity from solar energy by photovoltaic systems has the potential to reduce dependence on non-renewable sources for electrical energy production. It can also…
(more)
▼ Generation of electricity from solar energy by photovoltaic systems has the potential to reduce dependence on non-renewable sources for electrical energy production. It can also reduce the cost of electricity for consumers by moving away from the traditional models of centralised generation combined with extensive transmission. The prices of photovoltaic system components have decreased so dramatically in recent years that nowadays a large portion of the cost of electricity produced by photovoltaic systems is due to the cost of investment capital rather than the cost of the physical parts of the system. The cost of capital is determined by the perceived risk of the investment and is contingent on predictive models whose aim is to project outputs reasonably achievable by the system. The output of a photovoltaic system depends strongly on external factors, like solar radiation and temperature, as well as internal, system specific factors. Models that can accurately predict the output of a photovoltaic system have direct impact on investment cost. Several measures, like root-mean-square-error or coincident of determination, have been used in the past to assess accuracy of models but they appear to be inadequate for the task. I suggest a new method, comprising qualitative and quantitative measures, for model evaluation and introduce two new quantities to assess the predictive capabilities of the models. Models of several photovoltaic systems in Namibia were created, the new evaluation approach was applied to them and the results were compared to the conclusions that would have been drawn if the old measures were used. Outdoor current-voltage measurements are used to assess the power output and general state of the solar generator of a photovoltaic system, but the measured values strongly depend on irradiance and temperature. The prevailing approach has been to transform the current-voltage characteristics to standard-test-conditions with the so-called translation equations and then compare the translated power to the nominal value. The translated value of the power, however, depends on the translation equations used and is not necessarily an accurate reaction of the state of the solar generator. I have proposed a new method for assessment of the state of the solar generator that relies only on the measured quantities and does not require translations to standard-test-conditions. This alternative method has been used in the assessment of the condition of the solar generators in the systems included in this study.
Subjects/Keywords: Photovoltaic power systems; Photovoltaic power generation; Photovoltaic power generation – Mathematical models
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APA (6th Edition):
Dobreva, P. (2019). Energy yield modelling and analysis of photovoltaic systems in Namibia. (Thesis). Nelson Mandela Metropolitan University. Retrieved from http://hdl.handle.net/10948/39523
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Dobreva, Petja. “Energy yield modelling and analysis of photovoltaic systems in Namibia.” 2019. Thesis, Nelson Mandela Metropolitan University. Accessed March 07, 2021.
http://hdl.handle.net/10948/39523.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Dobreva, Petja. “Energy yield modelling and analysis of photovoltaic systems in Namibia.” 2019. Web. 07 Mar 2021.
Vancouver:
Dobreva P. Energy yield modelling and analysis of photovoltaic systems in Namibia. [Internet] [Thesis]. Nelson Mandela Metropolitan University; 2019. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/10948/39523.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Dobreva P. Energy yield modelling and analysis of photovoltaic systems in Namibia. [Thesis]. Nelson Mandela Metropolitan University; 2019. Available from: http://hdl.handle.net/10948/39523
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Rochester Institute of Technology
14.
Vélez Díaz, José Raúl.
How does the power crisis problem affect data management in the Dominican Republic.
Degree: MS, Computer Science (GCCIS), 2010, Rochester Institute of Technology
URL: https://scholarworks.rit.edu/theses/138
► In the last decade, the Dominican Republic has been affected by a power crisis nation wide. In 2008, the crisis reached a deficit of…
(more)
▼ In the last decade, the Dominican Republic has been affected by a
power crisis nation wide. In 2008, the crisis reached a deficit of 40% in the
generation of
power; and the problem seems to go on as no agreement is executed to solve it. The problem is originated
from the lack of efficiency of many generators, and debts with the generators companies. An important aspect of the
power crisis is the challenge to provide
power quality to electronic equipment. Data management can be affected by this problem whenever there is data corruption or lost, and devices are damaged. Data availability is extremely important for a business to maintain operational and competitive. This study shows the reality of middle size enterprises in our country, which are on the need to implement solutions in order to protect their infrastructure. This investigation was performed by interviewing a set of enterprises, and analyzing how business is affected, the level of awareness for
power problems, and the solutions commonly used to protect the assets. The results presented that mostly all interviewed enterprises try to invest in
power protection and correction mechanisms, much of the time sacrificing investment for business growth. Even devoting a generous part of enterprise budgets to confront the
power crisis businesses are not 100% free
from the consequence of the
power crisis. As seen in the results, many businesses do not count with effective disaster recovery plans, nor business continuity plans. Frequent
power problems observed are blackouts, overvoltage, and voltage fluctuations.
Advisors/Committee Members: Border, Charles.
Subjects/Keywords: Power generation
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APA (6th Edition):
Vélez Díaz, J. R. (2010). How does the power crisis problem affect data management in the Dominican Republic. (Masters Thesis). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/138
Chicago Manual of Style (16th Edition):
Vélez Díaz, José Raúl. “How does the power crisis problem affect data management in the Dominican Republic.” 2010. Masters Thesis, Rochester Institute of Technology. Accessed March 07, 2021.
https://scholarworks.rit.edu/theses/138.
MLA Handbook (7th Edition):
Vélez Díaz, José Raúl. “How does the power crisis problem affect data management in the Dominican Republic.” 2010. Web. 07 Mar 2021.
Vancouver:
Vélez Díaz JR. How does the power crisis problem affect data management in the Dominican Republic. [Internet] [Masters thesis]. Rochester Institute of Technology; 2010. [cited 2021 Mar 07].
Available from: https://scholarworks.rit.edu/theses/138.
Council of Science Editors:
Vélez Díaz JR. How does the power crisis problem affect data management in the Dominican Republic. [Masters Thesis]. Rochester Institute of Technology; 2010. Available from: https://scholarworks.rit.edu/theses/138
University of Zambia
15.
Tembo, Moses.
Enhancement of Photoconversion Efficiency of P3HT:PCBM Polymer Solar Cell Using Squarylium iii Dye
.
Degree: 2016, University of Zambia
URL: http://dspace.unza.zm:8080/xmlui/handle/123456789/4773
► Ternary systems comprising of poly(3-hexylthiophene)(P3HT):(6,6)-phenyl-C61 butyric acid methyl ester (PCBM) and varying amounts of squarylium dye III (SQ3) were prepared and deposited by spin coating…
(more)
▼ Ternary systems comprising of poly(3-hexylthiophene)(P3HT):(6,6)-phenyl-C61 butyric acid
methyl ester (PCBM) and varying amounts of squarylium dye III (SQ3) were prepared and
deposited by spin coating to obtain nano-size thin films. The films produced were subsequently
annealed at 140 C for 10 min. Absorption spectra and electrical measurements were used to
evaluate the effects of thermal annealing and dye loading on the different blends. The films
were characterized for their surface morphology and film thickness using atomic force
microscopy. Photo-conversion efficiencies were determined following current density –
voltage (J-V) measurements under dark and illumination conditions enabling determination of
various solar cell parameters. A significant increase in the maximum peak absorbance, from
0.30 to 0.35 a.u. was observed by incorporating SQ3 molecules at 13 % w/w loading. The
absorption range was also observed to broaden (400 – 700 nm) extending to the near infra-red.
The inclusion of SQ3 molecules resulted in enhanced light harvesting capacity due to widening
of the absorption range. This consequentially resulted in an increase in photogenerated excitons
and short circuit current (Isc). The HOMO of SQ3 is reported to be located between the HOMO
and LUMO of levels of P3HT and PCBM. It has been further suggested that incorporation of
SQ3 molecules introduce a second exciton generation system and charge transfer mechanism.
Photoinduced charge transfer is not only favourable between P3HT and PCBM but also
between SQ3 and PCBM. Thus, the synergistic effect of improved light harvesting
characteristics with additional exciton generation and charge transfer mechanism resulted in an
increase in photoconversion efficiency (η). The open circuit voltage (Voc), Isc, fill factor (FF)
and η in the control P3HT:PCBM were 0.53 V, 5.78 mA, 0.35 and 1.3 % which change to 0.64
V, 9.68 mA, 0.40 and 3.9 % in P3HT:SQ3:PCBM blends. Thus the inclusion of SQ3 into the
P3HT:PCBM polymer blends resulted in a threefold increase in photoconversion efficiency.
Subjects/Keywords: Photovoltaic cells;
Photovoltaic power generation
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APA (6th Edition):
Tembo, M. (2016). Enhancement of Photoconversion Efficiency of P3HT:PCBM Polymer Solar Cell Using Squarylium iii Dye
. (Thesis). University of Zambia. Retrieved from http://dspace.unza.zm:8080/xmlui/handle/123456789/4773
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tembo, Moses. “Enhancement of Photoconversion Efficiency of P3HT:PCBM Polymer Solar Cell Using Squarylium iii Dye
.” 2016. Thesis, University of Zambia. Accessed March 07, 2021.
http://dspace.unza.zm:8080/xmlui/handle/123456789/4773.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tembo, Moses. “Enhancement of Photoconversion Efficiency of P3HT:PCBM Polymer Solar Cell Using Squarylium iii Dye
.” 2016. Web. 07 Mar 2021.
Vancouver:
Tembo M. Enhancement of Photoconversion Efficiency of P3HT:PCBM Polymer Solar Cell Using Squarylium iii Dye
. [Internet] [Thesis]. University of Zambia; 2016. [cited 2021 Mar 07].
Available from: http://dspace.unza.zm:8080/xmlui/handle/123456789/4773.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tembo M. Enhancement of Photoconversion Efficiency of P3HT:PCBM Polymer Solar Cell Using Squarylium iii Dye
. [Thesis]. University of Zambia; 2016. Available from: http://dspace.unza.zm:8080/xmlui/handle/123456789/4773
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Oregon State University
16.
AL-Anazi, Falah.
Determining The Impact of Photovoltaic Generation on Power Systems.
Degree: MS, Electrical and Computer Engineering, 2016, Oregon State University
URL: http://hdl.handle.net/1957/59429
► The National Conference of State Legislatures NCSL declares that 29 states have been active in adopting and increasing renewable portfolio standards. Present renewable portfolio standards…
(more)
▼ The National Conference of State Legislatures NCSL declares that 29 states have
been active in adopting and increasing renewable portfolio standards. Present
renewable portfolio standards require utilities to increase integration of renewable
energy sources such as photovoltaic (PV). The increased penetration of PV systems
is expected to destabilize the
power system. Therefore, this thesis studies the
steady state voltage of Western Electric Coordinating Council (WECC) as the
penetration level of the PV system increases to find the point where the penetration
level makes the system unstable. In addition, this study serves to pinpoint the
violated transmission lines as the penetration level increases, while also identifying
why this violation occurs. The study is divided into two scenarios: integration of a
rooftop only PV system at unity
power factor and integration of both rooftop and
utility scale PV systems. The study uses MATpower simulation program to solve
the system
power flow for each scenario. The results show that when we integrate a
rooftop only PV system, the steady state voltage in the light loaded buses becomes
unstable as the penetration level increases. However, integrating both rooftop and
utility scale PV systems enhance the system stability. Also, the transmission line
violations are observed while PV system penetration level increases.
Advisors/Committee Members: Brekken, Ted (advisor), Cotilla-Sanchez, Eduardo (committee member).
Subjects/Keywords: PV; Photovoltaic power generation
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APA (6th Edition):
AL-Anazi, F. (2016). Determining The Impact of Photovoltaic Generation on Power Systems. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/59429
Chicago Manual of Style (16th Edition):
AL-Anazi, Falah. “Determining The Impact of Photovoltaic Generation on Power Systems.” 2016. Masters Thesis, Oregon State University. Accessed March 07, 2021.
http://hdl.handle.net/1957/59429.
MLA Handbook (7th Edition):
AL-Anazi, Falah. “Determining The Impact of Photovoltaic Generation on Power Systems.” 2016. Web. 07 Mar 2021.
Vancouver:
AL-Anazi F. Determining The Impact of Photovoltaic Generation on Power Systems. [Internet] [Masters thesis]. Oregon State University; 2016. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/1957/59429.
Council of Science Editors:
AL-Anazi F. Determining The Impact of Photovoltaic Generation on Power Systems. [Masters Thesis]. Oregon State University; 2016. Available from: http://hdl.handle.net/1957/59429
Anna University
17.
Ramesh V.
Reliability studies on co generation power
plant;.
Degree: Reliability studies on co generation power
plant, 2014, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/24214
► The Cogeneration Power Plant or Combined HeatandPower newlineSystems CHP are systems that simultaneously generate both electricity and newlineuseful heat besides reduction in the Green house…
(more)
▼ The Cogeneration Power Plant or Combined
HeatandPower newlineSystems CHP are systems that simultaneously
generate both electricity and newlineuseful heat besides reduction
in the Green house Gas GHG emission It is newlineimportant to
analyze the reliability of these systems in order to ensure lowest
newlinelevel of cost of system life cycle CHP system installed in a
sugar and textile newlinemill are considered as case studies in
order to assess its reliability through newlineFault Tree Analysis
FTA Weibulll Distribution Techniques Integrating of newlineEnhanced
Ladder Control Logic and basic availability analysis using Taguchi
newlineMethod newlineIn the FTA common cause failures are evaluated
using the newlinefactor model with the available data on the
failure and restoration of the newlineplant On a detailed analysis
it is found that the unavailability of the CHP newlinesystem in the
sugar mill is 250E3 and in the textile mill is 850E03 It is
newlinenoted that the CHP system unavailability is due to failures
related to newlinemechanical system subsystems of condenser boiler
and turbine newline newline
Reference p.245-255
Advisors/Committee Members: Saravanan R.
Subjects/Keywords: electrical engineering; generation; power plant
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APA (6th Edition):
V, R. (2014). Reliability studies on co generation power
plant;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/24214
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
V, Ramesh. “Reliability studies on co generation power
plant;.” 2014. Thesis, Anna University. Accessed March 07, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/24214.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
V, Ramesh. “Reliability studies on co generation power
plant;.” 2014. Web. 07 Mar 2021.
Vancouver:
V R. Reliability studies on co generation power
plant;. [Internet] [Thesis]. Anna University; 2014. [cited 2021 Mar 07].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/24214.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
V R. Reliability studies on co generation power
plant;. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/24214
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Addis Ababa University
18.
Seblewongel, Tesfu.
Simulation of Parabolic Trough Concentrating Solar Power Generation System
.
Degree: 2014, Addis Ababa University
URL: http://etd.aau.edu.et/dspace/handle/123456789/6022
► Climate change has drastically increased causing global warming due to emission of greenhouse gas with the provision of energy services that community of the world…
(more)
▼ Climate change has drastically increased causing global warming due to emission of
greenhouse gas with the provision of energy services that community of the world uses. In
order to work against this trend, varieties of researches are necessary to avoid the negative
impacts of global warming. Among the various forms, of utilizing energy mechanisms that
curtails the emission of greenhouse gases is solar energy electricity production.
In this work, theoretical performance of concentrated solar
power system (CSPS) using
parabolic trough collectors (PTC) is investigated. The software TRNSYS and the Solar
Thermal Electric Components (STEC) library are used to model the
power system design and
simulations. This model was constructed using data
from an existing 30 MW Solar Electric
Generating System (SEGS VI) using PTC’s in Karmer Junction, California. Input data and
results of the simulation of the already existing SEGS VI plant were used for validating the
current model.
The validated model is used for building a 10 MW system using TRNSYS. The reference
state point properties which are used as inputs in the 10 MW TRNSYS model are determined
using MATLAB software. A MATLAB code is used to find the initial pressure after giving
first guess for the initial pressure and checking the error. This initial pressure is found to be
P (1) = 100 [bar]. This pressure is found for initial steam temperature of 371 O C. Then,
hourly simulations of electrical
power and direct normal irradiance (DNI) are determined for
selected days of year 2001 (for which complete data are available), for Adigala, Ethiopia.
Different kinds of criteria for land use, annual irradiation and infrastructure are discussed in
order to properly locate the CSP plants. Depending on the data gathered and on the criteria
set for the CSP installation, north eastern Ethiopia is a suitable site since it has a flat land
topology and high solar insolation.
As the cost of
power generation by CSP technologies is of great importance for the
promotion of the technology to be proven as competitive alternative to the conventional oil or
gas fired
power plants. This thesis work tackles the economic aspect by investigating the cost
of electricity
generation of the modeled parabolic trough
power plant using simulation tool
SAM (System Advisor Model).
Advisors/Committee Members: Dr.-Ing. Abebayehu Assefa (advisor).
Subjects/Keywords: Parabolic;
Solar Power Generation System
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Manager
APA (6th Edition):
Seblewongel, T. (2014). Simulation of Parabolic Trough Concentrating Solar Power Generation System
. (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/6022
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Seblewongel, Tesfu. “Simulation of Parabolic Trough Concentrating Solar Power Generation System
.” 2014. Thesis, Addis Ababa University. Accessed March 07, 2021.
http://etd.aau.edu.et/dspace/handle/123456789/6022.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Seblewongel, Tesfu. “Simulation of Parabolic Trough Concentrating Solar Power Generation System
.” 2014. Web. 07 Mar 2021.
Vancouver:
Seblewongel T. Simulation of Parabolic Trough Concentrating Solar Power Generation System
. [Internet] [Thesis]. Addis Ababa University; 2014. [cited 2021 Mar 07].
Available from: http://etd.aau.edu.et/dspace/handle/123456789/6022.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Seblewongel T. Simulation of Parabolic Trough Concentrating Solar Power Generation System
. [Thesis]. Addis Ababa University; 2014. Available from: http://etd.aau.edu.et/dspace/handle/123456789/6022
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
19.
野口, 剛裕.
振動を利用した発電装置の開発 : DEVELOPMENT OF GENERATING SET USING VIBRATION.
Degree: 2013, Hosei University / 法政大学
URL: http://hdl.handle.net/10114/8699
► In this thesis, the device that changed the vibration into energy was developed. Recently, our daily life depends on the oil resource. Various environmental problems…
(more)
▼ In this thesis, the device that changed the vibration into energy was developed. Recently, our daily life depends on the oil resource. Various environmental problems have happened because of excessive use of the oil resource. Therefore, a new energy source is groped for. The purpose of the present study is shown below. 1) Development of device that converts vibration into energy. 2) It searches for the vibratory source which causes it in daily life. 3) Electricity is generated by the vibration in the device. The electric energy is verified.
Subjects/Keywords: Electromagnetic induction; Power generation; coil
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APA (6th Edition):
野口, . (2013). 振動を利用した発電装置の開発 : DEVELOPMENT OF GENERATING SET USING VIBRATION. (Thesis). Hosei University / 法政大学. Retrieved from http://hdl.handle.net/10114/8699
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
野口, 剛裕. “振動を利用した発電装置の開発 : DEVELOPMENT OF GENERATING SET USING VIBRATION.” 2013. Thesis, Hosei University / 法政大学. Accessed March 07, 2021.
http://hdl.handle.net/10114/8699.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
野口, 剛裕. “振動を利用した発電装置の開発 : DEVELOPMENT OF GENERATING SET USING VIBRATION.” 2013. Web. 07 Mar 2021.
Vancouver:
野口 . 振動を利用した発電装置の開発 : DEVELOPMENT OF GENERATING SET USING VIBRATION. [Internet] [Thesis]. Hosei University / 法政大学; 2013. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/10114/8699.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
野口 . 振動を利用した発電装置の開発 : DEVELOPMENT OF GENERATING SET USING VIBRATION. [Thesis]. Hosei University / 法政大学; 2013. Available from: http://hdl.handle.net/10114/8699
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Houston
20.
He, Ran 1990-.
Study on Half-Heusler Compounds for Thermoelectric Power Generation.
Degree: PhD, Physics, 2016, University of Houston
URL: http://hdl.handle.net/10657/5389
► Thermoelectric (TE) technique is unique in heat-to-power conversion due to its solid and non-moving nature. The efficiency of thermoelectric devices is related to the dimensionless…
(more)
▼ Thermoelectric (TE) technique is unique in heat-to-
power conversion due to its solid and non-moving nature. The efficiency of thermoelectric devices is related to the dimensionless figure-of-merit (ZT) of the material, defined as ZT=(S
2 σ)/κ T, where S, , , and T are the Seebeck-coefficient, electrical conductivity, thermal conductivity, and absolute temperature, respectively, and the term S2 is called the
power factor. The design of TE devices for
power generation applications requires the knowledge of the mechanical properties of TE materials due to the externally loaded mechanical and thermal stresses. Therefore, this nanoindentation technique was adopted to test the mechanical properties of various TE materials applied in a moderate-temperature range (200-700 °C). The results show the half-Heusler (HH) compounds are more mechanically robust as compared with other materials and favorable for applications. However, the usage of hafnium (Hf) in the HH compounds is unfavorable for applications due to its ultrahigh price. Therefore, the TE performances of p-type HH compounds were investigated with decreased Hf usage. The optimized new compound (Hf0.19Zr0.76Ti0.05CoSb0.8Sn0.2) has ZT values similar to the previously reported best composition (Hf0.44Zr0.44Ti0.12CoSb0.8Sn0.2). But the specific
power cost ( W-1) of the new compound is much lower due to the suppressed usage of Hf. Similar suppressing of
power cost was also obtained in the NbCoSn-based n-type HH compounds through the elimination of Hf usage. Furthermore, the study of TE performances of the NbFeSb-based p-type HH, another Hf-free compound, resulted in an extremely high
power factor of ~106 μW cm-1 K-2 in Nb0.95Ti0.05FeSb due to the improved carrier mobility. This is the highest
power factor among the semiconductor thermoelectric materials above room temperature. Subsequently, a single-leg device based on the high-
power-factor material yielded a record output-
power density of ~22 W cm-2 operating at between 293 and 868 K. Such a high output-
power density greatly facilitates the large-scale
power generation applications.
Advisors/Committee Members: Ren, Zhifeng (advisor), Chu, Wei-Kan (committee member), Varghese, Oomman K. (committee member), Chen, Shuo (committee member), White, Kenneth W. (committee member).
Subjects/Keywords: Thermoelectrics; Half-Heusler; Power generation
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APA (6th Edition):
He, R. 1. (2016). Study on Half-Heusler Compounds for Thermoelectric Power Generation. (Doctoral Dissertation). University of Houston. Retrieved from http://hdl.handle.net/10657/5389
Chicago Manual of Style (16th Edition):
He, Ran 1990-. “Study on Half-Heusler Compounds for Thermoelectric Power Generation.” 2016. Doctoral Dissertation, University of Houston. Accessed March 07, 2021.
http://hdl.handle.net/10657/5389.
MLA Handbook (7th Edition):
He, Ran 1990-. “Study on Half-Heusler Compounds for Thermoelectric Power Generation.” 2016. Web. 07 Mar 2021.
Vancouver:
He R1. Study on Half-Heusler Compounds for Thermoelectric Power Generation. [Internet] [Doctoral dissertation]. University of Houston; 2016. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/10657/5389.
Council of Science Editors:
He R1. Study on Half-Heusler Compounds for Thermoelectric Power Generation. [Doctoral Dissertation]. University of Houston; 2016. Available from: http://hdl.handle.net/10657/5389
21.
Fink, Jacob Eugene.
Fine Line Metallization of Silicon Heterojunction Solar Cells via Collimated Aerosol Beam Direct Write.
Degree: 2012, North Dakota State University
URL: http://hdl.handle.net/10365/26656
► Solar energy has come to the forefront as a scalable and largely underutilized renewable energy resource. The current cost of solar electricity, namely from photovoltaics,…
(more)
▼ Solar energy has come to the forefront as a scalable and largely underutilized renewable energy resource. The current cost of solar electricity, namely from photovoltaics, along with other logistics factors, has prevented the widespread adaptation of the technology. A key determinant of efficiency and cost for a solar cell is the current collector grid. This work presents the Collimated Aerosol Beam Direct Write (CAB-DW) system as a non-contact printing method that can achieve current collector grid finger widths of less than 10 ?m which are amenable to decreasing both resistive and optical losses. The ability to produce high aspect ratio grid fingers, and deposit optimized grid structures on high efficiency SHJ solar cells using silver nanoparticle inks is also demonstrated. A decrease in shadowing and via profile modification of the grid fingers is presented, along with a study of aging and degradation of electrical properties within silver nanoparticle inks.
Subjects/Keywords: Aerosols.; Photovoltaic power generation.
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APA (6th Edition):
Fink, J. E. (2012). Fine Line Metallization of Silicon Heterojunction Solar Cells via Collimated Aerosol Beam Direct Write. (Thesis). North Dakota State University. Retrieved from http://hdl.handle.net/10365/26656
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Fink, Jacob Eugene. “Fine Line Metallization of Silicon Heterojunction Solar Cells via Collimated Aerosol Beam Direct Write.” 2012. Thesis, North Dakota State University. Accessed March 07, 2021.
http://hdl.handle.net/10365/26656.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Fink, Jacob Eugene. “Fine Line Metallization of Silicon Heterojunction Solar Cells via Collimated Aerosol Beam Direct Write.” 2012. Web. 07 Mar 2021.
Vancouver:
Fink JE. Fine Line Metallization of Silicon Heterojunction Solar Cells via Collimated Aerosol Beam Direct Write. [Internet] [Thesis]. North Dakota State University; 2012. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/10365/26656.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Fink JE. Fine Line Metallization of Silicon Heterojunction Solar Cells via Collimated Aerosol Beam Direct Write. [Thesis]. North Dakota State University; 2012. Available from: http://hdl.handle.net/10365/26656
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Delft University of Technology
22.
Bosch, H.A. (author).
Finite Element Analysis of a Kite for Power Generation.
Degree: 2012, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:888fe64a-b101-438c-aa6f-8a0b34603f8e
► The kite is modelled with the non-linear finite element method to stay close to its physical properties and represent its full non-linear flexible behaviour. The…
(more)
▼ The kite is modelled with the non-linear finite element method to stay close to its physical properties and represent its full non-linear flexible behaviour. The inflatable beams in the leading edge and struts are modelled with regular beam elements that represent the behaviour to reduce the amount of degrees of freedom drastically. The canopy is modelled with shell elements and uses a coarse mesh to reduce the computation time without losing essential deformation modes. The aerodynamic model of Breukels [7] is used to describe the distributed aerodynamic forces exerted on the kite depending on its deformation. The model is based on the assumption that the kite can be divided into a finite number of two dimensional wing sections. The aerodynamic properties are determined for each wing section
from a set of two dimension CFD experiments and distributed over the wing section using a set of weight factors. The finite element kite model and aerodynamic model form a fluid-structure-interaction problem together that needs to be solved iteratively. A solving algorithm is introduced that splits the structural and aerodynamic convergence and uses a load stepping algorithm to stabilize and speed-up convergence. The bridles and tether are modelled dynamically as simple spring-dampers using multi-body dynamic methods. The end of the bridles are connected to the kite at the bridle attachment points. The most important reduction principle is the assumption that the kite reacts quasi-static to the aerodynamic forces, because the inertia of the kite are very small compared to the aerodynamic forces. Therefore the local inertia of the kite are neglected when solving the finite element equations and the dynamic deformations of the kite can be approximated by a sequence of static solutions. The quasi-static fluid-structure-interaction problem returns forces that are exerted on the end points of the bridles in the dynamic simulation. These forces are assumed to remain constant during the period of a time step, eliminating the need to solve the fluid-structure-action problem in the dynamic differential equations. This method greatly reduces the amount of computation time, because the time integration only has to be done for the small number of degrees of freedom in the dynamic model and the fluid-structure-interaction problem only needs to be solved once in every time-step instead of multiple times in the time integration algorithm. All system components were implemented in Matlab and a controller was built to fly several figure eight tests with the model. Results show that the modelling approach leads to a fast and realistic model. A steering input results in dynamics and a real deformation that causes the kite to yaw comparable to real kites and other models. It can be concluded that all the assumptions were valid and led to a model that captures the kite behaviour realistically. The model is a factor 25-30 slower than real time, which is very fast considering the complexity of the calculations and that it was implemented in a non…
Advisors/Committee Members: Tiso, P. (mentor), Schmehl, R. (mentor), Rixen, D.J. (mentor), Zadpoor, A.A. (mentor).
Subjects/Keywords: finite element analysis; power generation
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Manager
APA (6th Edition):
Bosch, H. A. (. (2012). Finite Element Analysis of a Kite for Power Generation. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:888fe64a-b101-438c-aa6f-8a0b34603f8e
Chicago Manual of Style (16th Edition):
Bosch, H A (author). “Finite Element Analysis of a Kite for Power Generation.” 2012. Masters Thesis, Delft University of Technology. Accessed March 07, 2021.
http://resolver.tudelft.nl/uuid:888fe64a-b101-438c-aa6f-8a0b34603f8e.
MLA Handbook (7th Edition):
Bosch, H A (author). “Finite Element Analysis of a Kite for Power Generation.” 2012. Web. 07 Mar 2021.
Vancouver:
Bosch HA(. Finite Element Analysis of a Kite for Power Generation. [Internet] [Masters thesis]. Delft University of Technology; 2012. [cited 2021 Mar 07].
Available from: http://resolver.tudelft.nl/uuid:888fe64a-b101-438c-aa6f-8a0b34603f8e.
Council of Science Editors:
Bosch HA(. Finite Element Analysis of a Kite for Power Generation. [Masters Thesis]. Delft University of Technology; 2012. Available from: http://resolver.tudelft.nl/uuid:888fe64a-b101-438c-aa6f-8a0b34603f8e
Nelson Mandela Metropolitan University
23.
Dunderdale, Christopher.
Defect Classification in Photovoltaic Modules through Thermal Infrared Imaging using Machine Learning.
Degree: 2020, Nelson Mandela Metropolitan University
URL: http://hdl.handle.net/10948/48280
► As the global energy demand continues to soar, solar energy has become an attractive and environmentally conscious method to meet this demand. This study examines…
(more)
▼ As the global energy demand continues to soar, solar energy has become an attractive and environmentally conscious method to meet this demand. This study examines the use of machine learning techniques for defect detection and classification in photovoltaic systems using thermal infrared images. A deep learning and feature-based approach is also investigated for the purpose of detecting and classifying defective photovoltaic modules. The VGG-16 and MobileNet deep learning models are shown to provide good performance for the classification of defects. The scale invariant feature transform (SIFT) descriptor, combined with the random forest and support vector machine classifier, is also used to discriminate between defective and non-defective photovoltaic modules in a South African setting. The successful implementation of this approach has significant potential for cost reduction in defect classification over currently available methods.
Subjects/Keywords: Photovoltaic power generation – South Africa
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APA (6th Edition):
Dunderdale, C. (2020). Defect Classification in Photovoltaic Modules through Thermal Infrared Imaging using Machine Learning. (Thesis). Nelson Mandela Metropolitan University. Retrieved from http://hdl.handle.net/10948/48280
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Dunderdale, Christopher. “Defect Classification in Photovoltaic Modules through Thermal Infrared Imaging using Machine Learning.” 2020. Thesis, Nelson Mandela Metropolitan University. Accessed March 07, 2021.
http://hdl.handle.net/10948/48280.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Dunderdale, Christopher. “Defect Classification in Photovoltaic Modules through Thermal Infrared Imaging using Machine Learning.” 2020. Web. 07 Mar 2021.
Vancouver:
Dunderdale C. Defect Classification in Photovoltaic Modules through Thermal Infrared Imaging using Machine Learning. [Internet] [Thesis]. Nelson Mandela Metropolitan University; 2020. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/10948/48280.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Dunderdale C. Defect Classification in Photovoltaic Modules through Thermal Infrared Imaging using Machine Learning. [Thesis]. Nelson Mandela Metropolitan University; 2020. Available from: http://hdl.handle.net/10948/48280
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Waterloo
24.
Al-Sumaiti, Ameena Saad.
Power Generation Shortage in Developing Countries: Causes, Challenges and Solutions.
Degree: 2015, University of Waterloo
URL: http://hdl.handle.net/10012/9531
► Electricity consumers in developing countries are seeking reliable electricity services to subsidize the economy and assist the rising population. Underprivileged electricity services are major concerns…
(more)
▼ Electricity consumers in developing countries are seeking reliable electricity services to subsidize the economy and assist the rising population. Underprivileged electricity services are major concerns for these consumers because of power generation shortage. Electricity consumers will be disconnected from the grid as a mean of reducing the total load connected to the distribution grid. In many developing countries, the problem is considered to be severe due to population growth. It is also recognized that electricity shortage negatively affects the quality of life of the residential consumers in these countries.
This thesis proposes ways to reduce the severe effect of power generation shortage on developing countries’ consumers and these ways are appropriate for application in remote communities in Canada. These reductions are targeted to utility and residential electricity consumers to address the power generation shortage problem in developing countries.
The current status of electricity demand restricts grid expansion due to the limited available power generation. With population growth, there is a demand for a system reinforcement. This reinforcement is either by controlling the behavior of electricity consumers or accommodating new electricity supply resources. Since the behavior of electricity consumers is a major factor contributing to high electricity demand compared to the available power generation, this thesis will focus on optimally scheduling residential demand to minimize the negative gap between the current supply and the future expected demand by proposing two approaches based on scheduling the supply of electricity to either houses or devices within them. These approaches account for the uncertainty in many factors governing consumers’ perception to utilize electricity. From the utility aspect, this thesis proposes improving the grid efficiency by considering investments in alternative sources of supply, such as renewable energy sources to support the current generation to accommodate population growth. The economical aspects to select the best distribution generation sources are shown in this thesis. The thesis will also investigate how current policies can be modified to encourage investors in the power sector to build these resources. It is well known that developing countries do not have the adequate financial resources to build these resource systems. The thesis will also target finding the proper sizes of such energy systems by considering the uncertainty in the generation from these resources to address the power generation shortage. This solution is further expanded by considering the cooperation between the utility and the residential consumers to reduce the size of renewable energy systems while considering residential consumers’ demand scheduling.
The thesis sets recommendations targeting electricity services improvement to facilitate not only consumers’ lives, but also countries’ economies.
Subjects/Keywords: Power generation shortage; developing countries
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APA (6th Edition):
Al-Sumaiti, A. S. (2015). Power Generation Shortage in Developing Countries: Causes, Challenges and Solutions. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/9531
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Al-Sumaiti, Ameena Saad. “Power Generation Shortage in Developing Countries: Causes, Challenges and Solutions.” 2015. Thesis, University of Waterloo. Accessed March 07, 2021.
http://hdl.handle.net/10012/9531.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Al-Sumaiti, Ameena Saad. “Power Generation Shortage in Developing Countries: Causes, Challenges and Solutions.” 2015. Web. 07 Mar 2021.
Vancouver:
Al-Sumaiti AS. Power Generation Shortage in Developing Countries: Causes, Challenges and Solutions. [Internet] [Thesis]. University of Waterloo; 2015. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/10012/9531.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Al-Sumaiti AS. Power Generation Shortage in Developing Countries: Causes, Challenges and Solutions. [Thesis]. University of Waterloo; 2015. Available from: http://hdl.handle.net/10012/9531
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of New South Wales
25.
Khorshidi, Zakieh.
Techno-economic study of hybrid biomass-fossil power plants with and without CO2 capture.
Degree: Chemical Sciences & Engineering, 2016, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/55847
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:39533/SOURCE02?view=true
► To address climate change, decreasing CO2 emissions during electricity production, a major source of greenhouse gases, is necessary. One option is the co-utilization of nearly…
(more)
▼ To address climate change, decreasing CO2 emissions during electricity production, a major source of greenhouse gases, is necessary. One option is the co-utilization of nearly carbon-neutral biomass with fossil fuels at
power plants, which has the added advantage of potentially achieving negative emissions if CO2 capture is applied. The techno-economic feasibility of biomass usage along with fossil fuel or as a dedicated fuel for combustion and gasification-based
power generation, with and without CO2 capture in Australia is investigated. Sensitivity analyses are undertaken to evaluate jurisdictional variations in economic parameters on
power plant economic viability. Simple analytical or graphical tools are also developed to evaluate the economic incentives required to make each bio-
power technology viable. The results show that for biomass-coal co-firing, higher quality biomass is preferred as plant performance is not significantly affected. For biogas-natural gas co-firing, higher heating value biogas is preferred as it requires minimal modifications to plant equipment. The breakeven carbon price required to make each bio-
power technology cost competitive with the same technology without biomass and/or capture ranges between 37 – 97 $/t CO2. Including other incentives such as Renewable Energy Certificates, and low biomass to fossil fuel price can make bio-
power technologies economically viable at low carbon prices. A multi-criteria analysis compares deployment opportunities for bio-
power technologies based on the CO2 emission reduction potential, cost of electricity, biomass consumption rate, electricity output, and technology maturity. Using biomass in auxiliary units to provide the energy for capture at existing coal plants and supplementary biomass firing in existing NGCC plants (with and without capture) are the highest-rank options. These options provide relatively low cost emission reduction, are technically mature, and can alleviate electricity output loss due to capture. Dedicated biomass plants (with and without capture) are the lowest-rank option due to the high cost of electricity, high biomass requirement, and significant output loss for capture.Currently, using low to medium levels of biomass in combustion-based plants is a feasible method to reduce CO2 emissions. Deeper reductions could be achieved by increasing the R&D commitment for biomass conversion and CO2 capture technologies, introducing policy incentives, and increasing biomass supply.
Advisors/Committee Members: Wiley, Dianne, Chemical Sciences & Engineering, Faculty of Engineering, UNSW, Ho , Minh, Chemical Sciences & Engineering, Faculty of Engineering, UNSW.
Subjects/Keywords: CO2 capture; Biomass; Power generation
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Manager
APA (6th Edition):
Khorshidi, Z. (2016). Techno-economic study of hybrid biomass-fossil power plants with and without CO2 capture. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/55847 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:39533/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Khorshidi, Zakieh. “Techno-economic study of hybrid biomass-fossil power plants with and without CO2 capture.” 2016. Doctoral Dissertation, University of New South Wales. Accessed March 07, 2021.
http://handle.unsw.edu.au/1959.4/55847 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:39533/SOURCE02?view=true.
MLA Handbook (7th Edition):
Khorshidi, Zakieh. “Techno-economic study of hybrid biomass-fossil power plants with and without CO2 capture.” 2016. Web. 07 Mar 2021.
Vancouver:
Khorshidi Z. Techno-economic study of hybrid biomass-fossil power plants with and without CO2 capture. [Internet] [Doctoral dissertation]. University of New South Wales; 2016. [cited 2021 Mar 07].
Available from: http://handle.unsw.edu.au/1959.4/55847 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:39533/SOURCE02?view=true.
Council of Science Editors:
Khorshidi Z. Techno-economic study of hybrid biomass-fossil power plants with and without CO2 capture. [Doctoral Dissertation]. University of New South Wales; 2016. Available from: http://handle.unsw.edu.au/1959.4/55847 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:39533/SOURCE02?view=true
Rutgers University
26.
Mahani, Khashayar.
Distributed network-aware planning and control system with application in energy networks.
Degree: PhD, Industrial and Systems Engineering, 2019, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/60858/
► Significant increases in energy prices and price volatility, worsening global warming, adverse environmental footprints of fossil fueled energy and recent advances in energy system technologies…
(more)
▼ Significant increases in energy prices and price volatility, worsening global warming, adverse environmental footprints of fossil fueled energy and recent advances in energy system technologies have significantly elevated interest in clean distributed energy resources (DERs) and energy storage. Over the past decade, various forms of DERs, such as combined heat &
power, fuel cells, hybrid
power systems, microturbines, photovoltaic systems and reciprocating engines have been successfully integrated to the electric distribution systems. Moreover, environmental concerns have been urging for more and more integration of distributed renewable energy resources into the overall energy infrastructure. However, many challenges still remain; for instance, renewable
generation (such as wind and solar) is not dispatchable and its production is not necessarily coincident with system demand. As a result, cheap renewable may not efficiently be utilized at all times. In this context, battery energy storage systems can provide operation flexibility by storing excess renewable energy when there is low demand and dispatching it when its needed the most. With this in mind, the Federal Energy Regulatory Commission (FERC) recently enacted FERC Order 841, which attempts to remove barriers to the participation of electric storage resources in the capacity, energy, and ancillary service markets operated by Regional Transmission Organizations (RTO) and Independent System Operators (ISO).
In this work, a Distributed Network-Aware Planning and Control System is developed aiming at optimal sizing, capacity allocation and planning and control of energy storages using real-time information. A storage node in such network can be a single functional unit or an aggregation of multiple units (e.g. modular network of energy storages) owned by either a utility company or by a third party. Capacity of storage nodes in the network can be static and deterministic or change dynamically due to units’ degradation and/or unavailability. For instance, a parking facility with EVs and Vehicle to Grid (V2G) charging stations can be a good example of an aggregate storage node. Arrival and departure of vehicles to this facility, permission for V2G by vehicle owners, and vehicles’ scheduling and charging requirements all together define a complex stochastic process that govern the overall capacity of the facility’s energy storage. We build a model that describes such a process and determines energy storage capacity of the aggregate node. The underlying model closely connects to business opportunities that such a facility can present to individual vehicle owners or to the facility operator.
The planning and control scheme, introduced in this dissertation has significant impacts on overall energy network performance and efficiency by balancing dynamic demands with energy supply, and can be utilized to address a range of energy storage applications including
power quality and network reliability. The undertaken research in this dissertation can provide guidance on DER…
Advisors/Committee Members: Jafari, Mohsen A (chair), Parlikad, Ajith KN (co-chair), Jeong, Myong K (internal member), Boucher, Thomas O (internal member), Horesh, Raya (outside member), School of Graduate Studies.
Subjects/Keywords: Distributed generation of electric power
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APA (6th Edition):
Mahani, K. (2019). Distributed network-aware planning and control system with application in energy networks. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/60858/
Chicago Manual of Style (16th Edition):
Mahani, Khashayar. “Distributed network-aware planning and control system with application in energy networks.” 2019. Doctoral Dissertation, Rutgers University. Accessed March 07, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/60858/.
MLA Handbook (7th Edition):
Mahani, Khashayar. “Distributed network-aware planning and control system with application in energy networks.” 2019. Web. 07 Mar 2021.
Vancouver:
Mahani K. Distributed network-aware planning and control system with application in energy networks. [Internet] [Doctoral dissertation]. Rutgers University; 2019. [cited 2021 Mar 07].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/60858/.
Council of Science Editors:
Mahani K. Distributed network-aware planning and control system with application in energy networks. [Doctoral Dissertation]. Rutgers University; 2019. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/60858/
Rutgers University
27.
Epstein, Joshua A., 1987-.
Studies of the synthesis and depostion of Cu3BiS3 for use in phovoltaic devices.
Degree: PhD, Materials Science and Engineering, 2015, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/48484/
► As the world’s climate continues to change, alternative energy is being adopted more and more. Solar energy is one extremely promising candidate to supplement our…
(more)
▼ As the world’s climate continues to change, alternative energy is being adopted more and more. Solar energy is one extremely promising candidate to supplement our ever increasing energy needs. In order for it to be a viable solution, more efficient and less expensive solar panels must be made. While silicon solar panels are the current market leader their high manufacturing energy input and cost warrant looking into alternatives. Many thin film solar materials are being investigated such as CdTe, CIGS and CZTS, but all come with their own drawbacks. With a near ideal band gap, low toxicity and earth abundant elemental make up copper bismuth sulfide, Cu3BiS3, is a promising candidate for use in future photovoltaic devices. The research presented here details multiple methods to synthesize and deposit this material with an effort to keep the methods low cost, energy efficient and environmentally friendly. Multiple low temperature solvothermal routes to synthesizing copper bismuth sulfide, CBS, have been developed¬¬. The resulting powders have been verified as pure Cu3BiS3 via XRD peak matching. The precursor reactants tested for use were copper and bismuth nitrates, acetates, chlorides and hydroxides. L-cystine, L-cysteine, thiourea and CS2 have all been tested for use as sulfur sources. Seven of these combinations produced pure CBS powders. Two custom built benchtop reactors have been designed and fabricated with the aim of studying the possibility of a continuous flow reactor as a way to utilize these precipitation chemistries for making thin films of CBS. Heat and liquid flow simulations were performed in COMSOL multiphysics to assist in the reactor design process. The second reactor was designed to promote uniform liquid flow across the fluorine doped, tin oxide coated, FTO, glass. This reactor was also built with a temperature gradient transverse to the liquid flow so that the optimal temperature for the deposition of CBS could be evaluated. This reactor was also used to evaluate the deposition of CdS, an n-type semiconductor often used in thin film solar panels, onto FTO glass. CBS thin films were also prepared via electrodeposition and thermal treatment. The solution used was a mixture of copper nitrate, sodium sulfite and sodium citrate tribasic dihydrate dissolved in DI H2O and bismuth nitrate dissolved in ethylene glycol. To get the best coating it was found that the electrodeposition should be done at 1.2 V and last 5 minutes. Thermal treatment carried out in a 450°C tube furnace for 90 min in forming gas (95% N2 with 5% H2) along with sulfur vapor was proved best. No further treatment was required to obtain phase pure CBS coatings. This was verified with XRD peak analysis. Optical absorption, microstructural, and photoconductivity data are reported for CBS materials made using the above techniques.
Advisors/Committee Members: Birnie III, Dunbar P. (chair), Matthewson, Michael John (internal member), O'Carroll, Deidre (internal member), Skandan, Ganesh (outside member).
Subjects/Keywords: Photovoltaic power generation; Thin films
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APA (6th Edition):
Epstein, Joshua A., 1. (2015). Studies of the synthesis and depostion of Cu3BiS3 for use in phovoltaic devices. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/48484/
Chicago Manual of Style (16th Edition):
Epstein, Joshua A., 1987-. “Studies of the synthesis and depostion of Cu3BiS3 for use in phovoltaic devices.” 2015. Doctoral Dissertation, Rutgers University. Accessed March 07, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/48484/.
MLA Handbook (7th Edition):
Epstein, Joshua A., 1987-. “Studies of the synthesis and depostion of Cu3BiS3 for use in phovoltaic devices.” 2015. Web. 07 Mar 2021.
Vancouver:
Epstein, Joshua A. 1. Studies of the synthesis and depostion of Cu3BiS3 for use in phovoltaic devices. [Internet] [Doctoral dissertation]. Rutgers University; 2015. [cited 2021 Mar 07].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/48484/.
Council of Science Editors:
Epstein, Joshua A. 1. Studies of the synthesis and depostion of Cu3BiS3 for use in phovoltaic devices. [Doctoral Dissertation]. Rutgers University; 2015. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/48484/
Rutgers University
28.
Gharieh, Kaveh.
Towards resiliency with micro-grids: portfolio optimization and investment under uncertainty.
Degree: PhD, Civil and Environmental Engineering, 2015, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/48492/
► Energy security and sustained supply of power are critical for community welfare and economic growth. In the face of the increased frequency and intensity of…
(more)
▼ Energy security and sustained supply of power are critical for community welfare and economic growth. In the face of the increased frequency and intensity of extreme weather conditions which can result in power grid outage, the value of micro-grids to improve the communities’ power reliability and resiliency is becoming more important. Micro-grids capability to operate in islanded mode in stressed-out conditions, dramatically decreases the economic loss of critical infrastructure in power shortage occasions. More wide-spread participation of micro-grids in the wholesale energy market in near future, makes the development of new investment models necessary. However, market and price risks in short term and long term along with risk factors’ impacts shall be taken into consideration in development of new investment models. This work proposes a set of models and tools to address different problems associated with micro-grid assets including optimal portfolio selection, investment and financing in both community and a sample critical infrastructure (i.e. wastewater treatment plant) levels. The models account for short-term operational volatilities and long-term market uncertainties. A number of analytical methodologies and financial concepts have been adopted to develop the aforementioned models as follows. Capital budgeting planning and portfolio optimization models with Monte Carlo stochastic scenario generation are applied to derive the optimal investment decision for a portfolio of micro-grid assets considering risk factors and multiple sources of uncertainties. Real Option theory, Monte Carlo simulation and stochastic optimization techniques are applied to obtain optimal modularized investment decisions for hydrogen tri-generation systems in wastewater treatment facilities, considering multiple sources of uncertainty. Public Private Partnership (PPP) financing concept coupled with investment horizon approach are applied to estimate public and private parties’ revenue shares from a community-level micro-grid project over the course of assets’ lifetime considering their optimal operation under uncertainty.
Advisors/Committee Members: Guo, Qizhong (chair).
Subjects/Keywords: Distributed generation of electric power
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Export
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APA (6th Edition):
Gharieh, K. (2015). Towards resiliency with micro-grids: portfolio optimization and investment under uncertainty. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/48492/
Chicago Manual of Style (16th Edition):
Gharieh, Kaveh. “Towards resiliency with micro-grids: portfolio optimization and investment under uncertainty.” 2015. Doctoral Dissertation, Rutgers University. Accessed March 07, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/48492/.
MLA Handbook (7th Edition):
Gharieh, Kaveh. “Towards resiliency with micro-grids: portfolio optimization and investment under uncertainty.” 2015. Web. 07 Mar 2021.
Vancouver:
Gharieh K. Towards resiliency with micro-grids: portfolio optimization and investment under uncertainty. [Internet] [Doctoral dissertation]. Rutgers University; 2015. [cited 2021 Mar 07].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/48492/.
Council of Science Editors:
Gharieh K. Towards resiliency with micro-grids: portfolio optimization and investment under uncertainty. [Doctoral Dissertation]. Rutgers University; 2015. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/48492/
Euskal Herriko Unibertsitatea / Universidad del País Vasco
29.
Faÿ, François-Xavier.
Modelling and control for the oscillating water column
.
Degree: 2020, Euskal Herriko Unibertsitatea / Universidad del País Vasco
URL: http://hdl.handle.net/10810/50300
► Renewable energies are definitely part of the equation to limit our dependence to fossil fuels. Within this sector, ocean energies, and especially wave energy, represent…
(more)
▼ Renewable energies are definitely part of the equation to limit our dependence to fossil fuels. Within this sector, ocean energies, and especially wave energy, represent a huge potential but is still a growing area. And like any new field, it is synonym to a high cost of energy production. Increasing the energy production, while keeping the costs controlled, has the leverage to drop down the cost of energy produced by wave energy converters (WECs). The main objective of this thesis is to make progress on the understanding of the effect of advanced control algorithms in the improvement of the
power produced by wave energy devices. For that purpose, several control strategies are designed, compared, and assessed. To support this analysis, numerical models representing the overall energy conversion chain of WECs are developed. The Basque Country in Spain is fortunate enough to host the development and operation of two devices based on the Oscillating Water Column (OWC) principle. One is the Mutriku OWC plant, and the second is the floating buoy Marmok-A
from Oceantec/IDOM, both devices were made available for
sea trials. Several control algorithms were then implemented to be tested in real environments. Among them was a non-linear predictive control algorithm. Its test in real conditions represent a world first in the area of control for OWC systems, and maybe for the whole WEC sector if comparing with publicly available information. An outstanding results of the thesis is undoubtedly to move forward the predictive control algorithm
from TRL3 to TRL6 after successful implementation and operation in both devices under real environmental conditions.
Advisors/Committee Members: Marcos Muñoz, Margarita (advisor), Robles Sestafe, Eider (advisor).
Subjects/Keywords: hydrodynamics;
control engineering;
power generation
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Manager
APA (6th Edition):
Faÿ, F. (2020). Modelling and control for the oscillating water column
. (Doctoral Dissertation). Euskal Herriko Unibertsitatea / Universidad del País Vasco. Retrieved from http://hdl.handle.net/10810/50300
Chicago Manual of Style (16th Edition):
Faÿ, François-Xavier. “Modelling and control for the oscillating water column
.” 2020. Doctoral Dissertation, Euskal Herriko Unibertsitatea / Universidad del País Vasco. Accessed March 07, 2021.
http://hdl.handle.net/10810/50300.
MLA Handbook (7th Edition):
Faÿ, François-Xavier. “Modelling and control for the oscillating water column
.” 2020. Web. 07 Mar 2021.
Vancouver:
Faÿ F. Modelling and control for the oscillating water column
. [Internet] [Doctoral dissertation]. Euskal Herriko Unibertsitatea / Universidad del País Vasco; 2020. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/10810/50300.
Council of Science Editors:
Faÿ F. Modelling and control for the oscillating water column
. [Doctoral Dissertation]. Euskal Herriko Unibertsitatea / Universidad del País Vasco; 2020. Available from: http://hdl.handle.net/10810/50300
Nelson Mandela Metropolitan University
30.
Nyumbeka, Dumisani Joshua.
A scheduling model for the charging of electric vehicles in photovoltaic powered smart microgrids.
Degree: 2020, Nelson Mandela Metropolitan University
URL: http://hdl.handle.net/10948/49259
► Electric vehicles (EVs) have emerged as a viable option to advance sustainable mobility, but adoption is still relatively low. This has been largely due to…
(more)
▼ Electric vehicles (EVs) have emerged as a viable option to advance sustainable mobility, but adoption is still relatively low. This has been largely due to the limited range one can travel on a single charge, leading to range anxiety, longer charge cycles and long wait times at charging stations. One solution to range anxiety is to erect charging stations on major roads and urban centres. There is also a lack of real-time information regarding the state of charging stations and charging ports in existing charging infrastructure. To increase the benefit of using EVs, using renewable energy sources, such as photovoltaics (PV) to power EVs, can further increase the benefit of reduced carbon footprint. The main research objective was to design a Charge Scheduling Model for charging EVs using a PV-powered smart microgrid (SMG). The model addresses the lack of an integrated platform where EV drivers can schedule when and where to charge their EVs. The model also reduces the negative effects of the adoption of EVs, including range anxiety. The Charge Scheduling Model was developed using the Design Science Research (DSR) methodology and was the main artefact of the study. A literature study was conducted of research related to SMGs, renewable energy, EVs and scheduling, to identify shortcomings that currently exist in EV charge scheduling (EVCS), and to identify the requirements of a potential solution. The literature study also identified the hard and soft constraints that are unique to EVCS, and the available energy in the SMG was identified as one of the hard constraints. Therefore, an Energy Forecasting Model for forecasting energy generated in PV-powered SMGs was required before the Charge Scheduling Model could be designed. During the first iteration of the design and development activities of DSR, four models were designed and implemented to evaluate their effectiveness in forecasting the energy generated in PV-powered SMGs. The models were Support Vector Regression (SVR), K-Nearest Neighbour (KNN), Decision Trees, and Multilayer Perceptron. In the second iteration, the Charge Scheduling Model was designed, consisting of a Four Layered Architecture and the Three-Phase Data Flow Process. The Charge Scheduling Model was then used to design the EVCS prototype. The implementation of the EVCS prototype followed the incremental prototyping approach, which was used to verify the effectiveness of the model. An artificial-summative evaluation was used to evaluate the design of the Charge Scheduling Model, whereas iterative formative evaluations were conducted during the development of the EVCS prototype. The theoretical contribution of this study is the Charge Scheduling Model, and the EVCS prototype is the practical contribution. The results from both evaluations, i.e. the Energy Forecasting Model and the Charge Scheduling Model, also make a contribution to the body of knowledge of EVs.
Subjects/Keywords: Electric vehicles; Photovoltaic power generation; Photovoltaic power generation – Developing countries
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APA (6th Edition):
Nyumbeka, D. J. (2020). A scheduling model for the charging of electric vehicles in photovoltaic powered smart microgrids. (Thesis). Nelson Mandela Metropolitan University. Retrieved from http://hdl.handle.net/10948/49259
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Nyumbeka, Dumisani Joshua. “A scheduling model for the charging of electric vehicles in photovoltaic powered smart microgrids.” 2020. Thesis, Nelson Mandela Metropolitan University. Accessed March 07, 2021.
http://hdl.handle.net/10948/49259.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Nyumbeka, Dumisani Joshua. “A scheduling model for the charging of electric vehicles in photovoltaic powered smart microgrids.” 2020. Web. 07 Mar 2021.
Vancouver:
Nyumbeka DJ. A scheduling model for the charging of electric vehicles in photovoltaic powered smart microgrids. [Internet] [Thesis]. Nelson Mandela Metropolitan University; 2020. [cited 2021 Mar 07].
Available from: http://hdl.handle.net/10948/49259.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Nyumbeka DJ. A scheduling model for the charging of electric vehicles in photovoltaic powered smart microgrids. [Thesis]. Nelson Mandela Metropolitan University; 2020. Available from: http://hdl.handle.net/10948/49259
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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