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dc.contributor.authorPathak, Michael
dc.contributor.otherQueen's University (Kingston, Ont.). Theses (Queen's University (Kingston, Ont.))en
dc.date2011-11-04 14:31:45.216en
dc.date2011-11-14 11:09:16.727en
dc.date.accessioned2011-11-14T20:39:43Z
dc.date.issued2011-11-14
dc.identifier.urihttp://hdl.handle.net/1974/6870
dc.descriptionThesis (Master, Mechanical and Materials Engineering) -- Queen's University, 2011-11-14 11:09:16.727en
dc.description.abstractDriven by the limitations of solar-optimized roof space and International Energy Association (IEA) Task 35, there is a renewed interest in photovoltaic solar thermal (PVT) hybrid systems. Current PVT systems focus on cooling the solar photovoltaic (PV) cells to improve the electrical performance. This however, causes the thermal component (T) to underperform. An exergetic study was completed comparing a PVT, PV + T and a PV only system in Detroit, Denver and Phoenix. It was found that the PVT system outperformed the PV + T system by 72% for each location and by 8, 8.6 and 9.9% for Detroit, Denver and Phoenix when compared to the PV only system. To further improve the PVT system, using hydrogenated amorphous silicon (a-Si:H) PV as the absorber layer of the solar thermal device was explored. The temperature coefficient and annealing properties of a-Si:H allow the thermal component to run more efficiently, while enabling the a-Si:H i-layers to be thicker resulting in more electricity production. It was found that running i-layer thicker cells (630nm and 840nm) stabilized at higher efficiencies at 90°C (potential PVT operating temperatures) than the thinner cell (420nm) by 2% and 0.5% respectively. In addition, spike annealing, which is a new concept of stagnating a PVT system to allow for the a-Si:H PV to anneal and return it to its original efficiencies was also investigated. It was found that over the lifetime of the system with the spike annealing occurring once a day 10.6% more electricity was produced than a system without stagnation.en_US
dc.languageenen
dc.language.isoenen_US
dc.relation.ispartofseriesCanadian thesesen
dc.rightsThis publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.en
dc.subjectStaebler-Wronski effecten_US
dc.subjectPVTen_US
dc.subjecta-Si:Hen_US
dc.subjectPVen_US
dc.subjectsolar simulatoren_US
dc.subjectamorphous siliconen_US
dc.subjectphotovoltaic thermal hybriden_US
dc.titleHYDROGENATED AMORPHOUS SILICON PV AS AN ABSORBER COATING FOR PHOTOVOLTAIC THERMAL SYSTEMSen_US
dc.typeThesisen_US
dc.description.restricted-thesisThis thesis is a manuscript thesis and there are some chapters (just need to be reformatted to papers) which are to submitted to several journals soon.en
dc.description.degreeMasteren
dc.contributor.supervisorHarrison, Stephen J.en
dc.contributor.supervisorPearce, Joshua M.en
dc.contributor.departmentMechanical and Materials Engineeringen
dc.embargo.terms1825en
dc.embargo.liftdate2016-11-12


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