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基于实际工程建立了地源热泵空调系统运行过程的岩土体原位观测站,实现系统运行状况和换热过程中岩土体温度变化、水分迁移的实时监测,通过冬季工况运行试验,揭示地源热泵运行过程中土体的热湿迁移效应。研究结果表明:冬季工况下该地源热泵空调系统的机组性能系数COP为3.58,具有良好的制热效果;土壤温度场的变化受地埋管热交换和大气环境变化两个因素的影响,但二者的影响范围及程度有所区别;土壤温度场的变化幅度随着与地埋管距离的增加而递减,竖埋管热作用的影响半径约2.0 m左右,水平埋管热作用的影响半径约1.0 m左右;地埋管热交换对土壤湿度场的影响不显著,但大气降雨引起的地表水入渗和地下水位的变迁对土壤湿度场变化有明显影响。
Based on the actual project, an in situ observation station of geotechnical body was established, which can realize the real-time monitoring of temperature and moisture migration of rock and soil during the operation of the system and the heat transfer process. According to the operation test in winter, Heat and moisture transfer effect of soil during ground source heat pump operation. The results show that under the winter condition, the unit COP of the GSHP system is 3.58, which has a good heating effect. The change of soil temperature field is affected by the heat exchange of the buried pipe and the atmospheric environment. But the scope and extent of the difference between the two are different; the change range of soil temperature field decreases with the increase of distance from buried pipe, and the influence of thermal effect of vertical buried pipe is about 2.0 m, the effect of horizontal buried pipe thermal effect The radius is about 1.0 m; the heat exchange of buried pipe has no significant effect on the soil moisture field, but the infiltration of surface water and the change of groundwater level due to rainfall have a significant effect on the variation of soil moisture field.