1. China Energy Investment Group Co., Beijing 100039, China 2. School of Mechanical Engineering, Tianjin University, Tianjin 300350, China 3. School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
Taking copper indium gallium selenium photovoltaic modules as photovoltaic cells, a comparative experimental group was established to investigating the effects of ventilation flow rate and climate conditions on the thermal and photoelectric performance of the ventilated building integrated photovoltaic/ thermal system. The results showed that the thermal power and power generation of the system were positively correlated with the irradiation intensity, but the variation was not completely inconsistent due to the influence of ambient temperature. When the ventilation flow rate was 2.2 m/s, the comprehensive utilization rate of solar energy reached 65.4%. The average thermal efficiency and the relative power generation were proposed to characterize the system performance, and a quantitative relationship with the ventilation flow rate was obtained. When the ventilation flow rate increased from 0.4 m/s to 2.2 m/s, the average thermal efficiency of the system increased by 130.0% and the power generation efficiency only increased by about 4.0%. Considering the resistance and energy consumption, the ventilation flow rate was critical to the efficient operation of the system. The generalizability of the quantitative relationship was verified through repeated experiments in different regions.
Li-qun MA,Yu-long ZHAO,Yun-tong ZHAO,Shi-xue WANG. Experimental study of ventilated building integrated photovoltaic/ thermal system. Journal of ZheJiang University (Engineering Science), 2022, 56(11): 2168-2174.
Fig.4All-day thermal and electrical performance (flow velocity 2.2 m/s)
Fig.5Influence of light conditions on temperature of backplane (flow velocity 2.2 m/s)
Fig.6Changes in the relative temperature rise of the backplane (based on flow velocity 2.2 m/s)
Fig.7Influence of light conditions on thermal performance of system
Fig.8Influence of flow velocity on thermal efficiency
Fig.9Influence of flow velocity on relative power generation
Fig.10Influence of flow velocity on resistance power consumption
Fig.11Climatic conditions during experiment in Beijing
Fig.12Comparison of thermal and electrical performance between Beijing and Huizhou
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