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Through research on the performance of solar photovoltaic power generation, it is found that the power generation efficiency of photovoltaic (PV) modules decreases as the surface temperature of PV modules increases. The cooling medium transfers heat through heat conduction or convection to take away the heat generated by the PV module due to the photovoltaic effect, thereby reducing the surface temperature of the PV module, improving the power generation efficiency, and extending the service life of the PV module. The cooling medium with elevated temperature can be reused as a heat source. In this way, both electricity and heat can be obtained, that is, the integrated solar photovoltaic system (PVT system for short).

The greater the air humidity on the surface of the PV module, the lower the power generation efficiency and the lower the overall efficiency. In order to be able to use solar energy efficiently, PVT collectors are designed from the perspective of different factors that affect the performance of the PVT system at home and abroad. Analyzing the related patents in my country, it is found that some patents emphasize the light-gathering property of the PVT system, some emphasize the efficiency of the heat collection part by designing a new cooling fluid channel, and partly improve the system by designing different combinations of photovoltaic modules and photothermal modules Efficiency, part of the new process is proposed to simplify the production process of the collector.

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