Based on the continuous heat extraction from the heat storage by the buried tube heat exchanger in the middle and deep layers,the temperature field of the heat storage in the middle and deep layers shows different attenuation degrees at the end of the non-heating season.A comparative analysis was mainly conducted on the temperature field changes in two different recovery scenarios:natural recovery of thermal storage around buried pipes in the non heating season and human intervention thermal storage recovery after operating for one heating season.A heat transfer model was established using ANSYS Fluent,and solved using the finite volume method.The model was compared and verified with actual project data.Through comparative analysis of the two different recovery modes at the end of the non-heating season,the results show that when the deep heat storage through natural recovery in the middle of the non-heating season,the lowest heat recovery rate of heat storage temperature is 96.81％.At the end of the non-heating season,the maximum recovery rate of heat storage temperature can reach 158.09％.The temperature difference reaches 10.09 ℃ at the end of non-heating season,and the temperature difference decreases with the increase of depth and radial distance.
关键词
中深层地埋管/数值模拟/热储/蓄热/自然恢复
Key words
middle and deep buried pipe/numerical simulation/geothermal reservoir/thermal storage/spontaneous recovery
维普
万方数据