Energy performance of ETFE cushion roof integrated photovoltaic/thermal system on hot and cold days

This paper concerns energy performance of ETFE (ethylene tetrafluoroethylene) cushion roof integrated photovoltaic/thermal system (CIPV/T system). An experimental set-up composed of a three-layer ETFE cushion roof and amorphous silicon photovoltaic panels (a-Si PV) has been developed to investigate system energy performance. A series of tests from 10:00a.m. to 5:00p.m. were successfully carried out within ambient temperature of around 9°C and 39°C in December 2014 and August 2015, respectively. On the whole, experimental results show that this system operated smoothly and steadily. In this study, typical weather conditions ranging from low solar irradiance in winter to strong solar irradiance in summer were selected to investigate system energy performance, including solar energy utilization and structural parameters of ETFE cushion roof.

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