Study on Cross-Season Thermal Energy Storage Heating in School Buildings Based on TRNSYS
The PV/T coupled ground source heat pump system has received wide attention in terms of multi-energy complementarity and improving the utilization rate of renewable energy.In this paper,the application of the PV/T coupled ground source heat pump system to realize inter-seasonal heating in an elementary school project in Nanjing City is simulated and analyzed.TRNSYS software is applied to simulate the system's operating temperature,heat collection efficiency,equipment working conditions,and energy utilization.It is found that the cooling water exothermic from the PV/T cell through the buried pipe has a good heat collection and cooling effect;the average temperature of the soil heat storage body decreases only by 0.23℃,realizing the soil heat balance,and the inter-seasonal heat storage rate of the system is about 60%;the average COP of the heat pump unit is above 5,which is a good energy-saving effect;the system can provide 73.17%of the heat load of the building in the inter-seasonal period,and the power generation can The system can provide 73.17%of the building heat load across seasons,and the power generation can meet 63.2%of the heat pump energy consumption.
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