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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。
The average thermal conductivity and thermal resistance of soils are important factors that affect the heat transfer performance of underground heat exchangers and the energy saving and economy of ground source heat pump systems. Based on the theory of heat source, the parameters of inlet and outlet water temperature were obtained through the working test of ground-source heat pump. The least square method was used to fit the obtained data to obtain the thermal conductivity and soil thermal conductivity of borehole heat exchanger. Parameters, test conclusions for the design of soil heat exchanger design and construction has a certain reference value.