Study On Heat Compensation Of Soil Source Heat Pump System In Severe Cold Region

In this paper,the compensation heat power and the total heat transfer of different compensation heat sources and different compensation methods are studied by means of experimental measurement.On the basis of this,the influence of different compensation methods on the temperature field and average temperature of underground soil under the whole year operation condition is numerically investigated,and the thermal balance characteristics of soil under long-term operation were further studied.The main research contents and results are as follows:(1)The thermal compensation characteristics of the soil source heat pump system are experimentally investigated.In summer,the heat storage capacity of the ground source heat pump system is mainly affected by the outdoor average temperature and indoor set temperature.The heat storage capacity of the ground source heat pump system is measured during the regular operation time.During the transition season,the best switching time of combined air and solar energy compensation is obtained,and the thermal compensation parameters of underground soil are obtained by combining air energy,solar energy and two heat sources;(2)when the system is operating with or without thermal compensation for one year under different thermal compensation methods,the variation of the temperature field and average soil temperature of the soil-source heat pump system was simulated and analyzed.(3)The average temperature and temperature field of ground source heat pump system under long-term operation and different thermal compensation modes were simulated and analyzed.The heat balance characteristics of underground soil in ground source heat pump system were observed and analyzed;Through the research of this paper,we get the thermal compensation characteristics of underground soil with different heat sources and different thermal compensation ways,and the change in the average temperature and temperature field of underground soil in long and short run time.It provides some reference for the selection of the auxiliary heat source and the way of thermal compensation for the long-term stable operation of soil source heat pump system in severe cold area.