Comparative study of the thermal and power performances of a semi-transparent photovoltaic façade under different ventilation modes.
In: Applied Energy, Jg. 138 (2015-01-15), S. 572-583
academicJournal
Zugriff:
This paper studied the thermal and power performances of a ventilated photovoltaic façade under different ventilation modes, and appropriate operation strategies for different weather conditions were proposed accordingly to maximize its energy conversion efficiency. This ventilated PV double-skin façade (PV-DSF) consists of an outside layer of semi-transparent amorphous silicon (a-Si) PV laminate, an inward-openable window and a 400 mm airflow cavity. Before installation, the electrical characteristics under standard testing conditions (STC) and the temperature coefficients of the semi-transparent PV module were tested and determined in the laboratory. Field measurements were carried out to investigate the impact of different ventilation modes, namely, ventilated, buoyancy-driven ventilated and non-ventilated, on the thermal and power performances of this PV-DSF. The results show that the ventilated PV-DSF provides the lowest average solar heat gain coefficient (SHGC) and the non-ventilated PV-DSF provides the best thermal insulation performance. In terms of power performance, the energy output of the ventilated PV-DSF is greater than those of the buoyancy-driven ventilated and non-ventilated PV-DSFs by 1.9% and 3%, respectively, due to its much lower operating temperature. Based on the experimental results, a conclusion was drawn that the ventilation design can not only reduce the heat gain of PV-DSF but also improve the energy conversion efficiency of PV modules by bringing down their operating temperature. In addition, an optimum operation strategy is recommended for this kind of PV-DSF to maximize its overall energy efficiency under different weather conditions. [ABSTRACT FROM AUTHOR]
Titel: |
Comparative study of the thermal and power performances of a semi-transparent photovoltaic façade under different ventilation modes.
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Autor/in / Beteiligte Person: | Peng, Jinqing ; Lu, Lin ; Yang, Hongxing ; Ma, Tao |
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Zeitschrift: | Applied Energy, Jg. 138 (2015-01-15), S. 572-583 |
Veröffentlichung: | 2015 |
Medientyp: | academicJournal |
ISSN: | 0306-2619 (print) |
DOI: | 10.1016/j.apenergy.2014.10.003 |
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