Abstract
In this paper, the authors aim at improving the knowledge on this topic presenting a dynamic model of a solar heating system based on PVT technology. With respect to the papers mentioned above, the layout proposed includes all the components required for operating the sys-tem. The TRNSYS simulation platform of the PVT cogeneration heating system has been established for researching the system performance of PVT solar cogeneration heating system. The inlet and outlet temperature, the electrical power output of PVT collector, heat consumption, outlet temperatures of auxiliary heat source and outlet temperatures of heat storage tank of PVT collector have been studied in this paper. The results of this investigation may be summarized as follows. The PVT collector 32m2 in size in the system can achieve annual power output of 131kWh electric energy. The heat gain of heat collector system between 12 am and 6 pm on the typical day, when the auxiliary heat source is not turned on can meet the load demand. Indoor temperature varies between 16.3∼19.5°C on the typical day, fluctuation of indoor temperature s impacted by outdoor ambient temperature and solar radiation. The entire heating season that the solar fraction of this solar heating system is 31.7%, which is close to the design value of 30%.
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