Optimization Of Solar Energy Interseasonal Energy Storage Heating Application System

Solar energy interseasonal energy storage heating system combines solar energy with ground source heat pump,that is,it USES soil to convert abundant solar energy in spring,summer and autumn into heat energy and stores it in underground soil,and then takes it out in winter heating season to provide heat for the building.In this way,environmental pollution caused by building heating can be alleviated,and clean energy can be used to relieve energy pressure.The heat storage medium in this study is underground soil.Gambit software was used to build a buried pipe heat exchanger model according to the actual project situation,and UDF program was used to control solar radiation time and inlet flow velocity.Finally,Fluent was used for heat transfer simulation.After the simulation,soil temperature cloud map,soil temperature point map,and the detected soil temperature,outlet temperature and other information were used to analyze the heat exchange situation of buried pipe heat exchanger.The underground tube heat exchanger in this study is cylindrical on the whole.For the convenience of the study,one-fourth of the whole model is simulated,so as to obtain the heat transfer of the whole model.In this part,four double-U pipes are connected in series in a clockwise direction.The buried pipes are backfilled soil outside and the backfilled soil outside.The soil in the model is stratified according to the layered structure of the soil in Baoding area.The operating conditions of the system when the heat storage temperature is 70℃,80℃ and 90℃ are simulated.After system simulation and comparative analysis,when the heat storage temperature of the solar energy trans-seasonal energy storage heating system is 80 ℃,the soil temperature is evenly distributed.From the data of six years of simulation operation,the heat extraction and heat storage of the system after stable operation can meet the indoor heating demand of the building,and the system operation is relatively stable.Therefore,the original system can be reformed to reduce the heat storage temperature of the system,so as to optimize the system setting and reduce the energy consumption of the system.According to the analysis of economic and environmental benefits,the investment of this system has a shorter recovery period and can reduce the emission of a large amount of carbon dioxide,dust,sulfur dioxide and nitrogen oxide.From the perspective of energy and environment,this system is worth popularizing in engineering practice.