热泵地埋管周围土壤热湿迁移研究

Heat and moisture transfer performance of soil around heat pump buried pipe

针对热泵地埋管周围土壤内热湿耦合迁移特性开展研究,采用非饱和多孔介质三参数渗流物理模型,将地埋管温度边界与土壤温度边界进行耦合,利用FLUENT软件的UDF功能对地埋管和周围土壤进行耦合运算,得到非冻土条件下地埋管周围土壤水饱和度、压力和温度梯度的变化规律,数值模拟结果与现场测试结果进行对比,吻合较好.

The research was carried on the heat and moisture transfer performance of soil around heat pump. A numerical model of unsaturated porous media was employed to couple the temperature bound- ary of buried pipe and soil. The extension of function User-Defined Function （UDF）, provided by FLUENT software, was used to simulate the variation of water saturation, pressure and temperature distribution. The analytic result mainly accords with the experimental result.