中文摘要：

土壤的平均导热系数与热阻是影响地下埋管换热器传热性能及地源热泵系统节能性与经济性的重要因素。利用线热源理论,通过地源热泵的工作试验过程,得到系统进出口水温等参数,并通过最小二乘法对所得数据进行拟合,得到地埋管换热器钻孔的导热系数及土壤热物性参数,测试结论对于指导土壤热交换器设计与施工具有一定的参考价值。

英文摘要：

The average thermal conductivity coefficient and thermal resisitence of soil are the key factors that affect the heat transfer performance of underground heat exchanger, the energy-saving and economical efficiency of the ground source heat pump. Based on the theory of line heat source, we get parameters including water temperature of inlet and outlet, through the experiment, and make function fitting with the data so as to work out the thermal conductivity coefficient and some other thermal parameters of soil, which can be consulted to design and apply underground heat exchanger.