土壤热物性与地埋管换热器换热性能研究

本文采用恒热流法对某地源热泵系统工程进行土壤热响应测试,数据处理采用线热源模型,线性关系推导法得到测试结果。现场钻孔埋设单U型、双U型地埋管换热器,钻井深度有80m、100m,比较不同埋管形式下测试出的单位井深换热量、土壤导热系数、钻孔热阻及土壤热扩散率之间的关系,并分析结果差异的原因,为实际设计提供可靠依据。

Study of Soil Thermal Properties and Underground Heat Exchanger Performance

In this paper,constant heat flow method is used on a ground source heat pump systems engineering for soil thermal response test.Data processing adopts line heat resource model,and the test results are got with linear derivation method.Single U-bend loop and two U-bend loops underground heat exchanger are applied for drilling burial,drilling depths include 80m,100m,it compares the relationship of average quantity of heat per meter,soil thermal conductivity,borehole thermal resistance and soil thermal diffusivity tested in different forms of pipe,analyzes the reasons for differences in the results,and provides a reliable basis for practical design.