The combined application of solar heat pump and soil source not only greatly improves the utilization rate of clean energy,but also solves the temperature field reduction caused by the imbalance of soil load in winter and summer.The classification and existing problems of solar heat pump system is introduced to propose the necessity of solar coupled soil source heat pump system.According to the mine conditions,the academic concept of solar-coupled backfill heat pump system is further proposed,the possibility of combining the two is analyzed,and the TRNSYS software is used to simulate the project in Shijiazhuang.The operation mode of heat storage in summer and transition season and heating in winter is described.The output results and the utilization value of the system are analyzed.The results show that compared with the case where the temperature field variation rate of backfill is 11.56%without solar heat storage,the temperature field variation rate is only 3.67%with solar heat storage.In the solar heat pump coupled backfill heat pump system,the total absorption heat of the filling body is 304377.90 kW·h,and the total release heat of the filling body is 222461.89 kW·h.It is equivalent to saving 27.36 tons of standard coal,reducing carbon emissions by 18.6 tons and reducing carbon dioxide emissions by 68.21 tons.The reference is provided for subsequent backfill heat storage and heat utilization in mining area.
solar heat pump systemcoupling systemTRNSYSbackfilloperation mode
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