Performance Evaluation of an Improved Unglazed Photovoltaic and Thermal Hybrid System
Performance Evaluation of an Improved Unglazed Photovoltaic and Thermal Hybrid System
复制标题
改进的无釉光伏热混合系统的性能评估
DOI：
10.1115/1.4053951
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发表时间：
2022-02
期刊：
影响因子：
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通讯作者：
Yunjie Wang
中科院分区：
文献类型：
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作者：
Hao Fang;Jinwei Ma;Tao Du;Qianqian Chen;Haifei Chen;Weiwei Tong;Yunjie Wang
抽象的。本文提出了一种新型的无釉光伏/光热（PV/T）系统，该系统完全由光伏（PV）电池覆盖，可以显著提高发电量，无釉结构有助于提高发电性能。变流量实验表明，无釉PV/T的日电、热效率平均值分别达到18.62%和26.86%，相应的（火用）效率和节能效率分别为20.51%和73.76%。与光伏组件相比，PV/T组件的电效率提高了11.54%。针对无釉太阳能集热器热损失大的问题，提出了将太阳能集热器组件串联或并联的方法来提高集热能力。结果表明，串联或并联系统的电能和热能显著增加，当水量增加一倍以上时，水温可提高20 °C。但是，系统的电效率低于单PV/T，最大值为17.32%。结合经济性分析，无釉光伏发电系统比有釉光伏发电系统具有更高的（火用）效率，且成本更低。
Abstract. This paper proposes a novel unglazed photovoltaic/thermal (PV/T) system completely covered by photovoltaic (PV) cells, the system can significantly increase the power generation, and unglazed structure helps to improve the performance of the electricity. The variable flow experiment shows that the average value of the unglazed PV/T daily electrical and thermal efficiencies can reach 18.62% and 26.86%, respectively, and the corresponding exergy and energy saving efficiencies are 20.51% and 73.76%. Compared with PV module, the electrical efficiency of the PV/T module is increased by 11.54%. As for the large heat loss of unglazed PV/T, a series or parallel system composed of PV/T modules was built to improve heat collection capacity. The results show that the electrical and thermal energy of the series or parallel system increases significantly; temperature of water can be increased by 20 °C when the water volume is more than doubled. However, the electrical efficiency of the system is lower than that of the single PV/T, and the maximum value is 17.32%. Combined with economic analysis, the unglazed PV/T system with higher exergy efficiency and the cost is lower than that of glazed PV/T.