Thermodynamic analysis of solar photovoltaic cell systems |
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| Authors: | Ahmet Duran Sahin Ibrahim Dincer Marc A Rosen |
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| Affiliation: | aIstanbul Technical University, Aeronautic and Astronautics Faculty, Meteorology Department, 34469 Istanbul, Turkey;bFaculty of Engineering and Applied Science, University of Ontario Institute of Technology (UOIT), Oshawa, Ont., Canada L1H 7K4 |
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| Abstract: | The thermodynamic characteristics of solar photovoltaic (PV) cells are investigated from a perspective based on exergy. A new efficiency is developed that is useful in studying PV performance and possible improvements. Exergy analysis is applied to a PV system and its components, and exergy flows, losses and efficiencies are evaluated. Energy efficiency is seen to vary between 7% and 12% during the day. In contrast, exergy efficiencies, which incorporate the second law of thermodynamics and account for solar irradiation exergy values, are lower for electricity generation using the considered PV system, ranging from 2% to 8%. Values of “fill factors” are determined for the system and observed to be similar to values of exergy efficiency. |
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| Keywords: | Chemical exergy Energy Open-circuit voltage Photovoltaic Short-circuit current Solar |
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