地层热物性参数的确定对浅层地热能地源热泵系统的设计至关重要。依托陕西渭南某地源热泵项目,应用恒流法进行了岩土热响应测试,测试共进行了58 h,根据线热源理论对测试数据进行分析计算,求得准确的地层热物性参数,得到工区地层导热系数为2.16 W/(m∙K),比热容为2.39 MJ/(m3∙K),单U地埋管每延米换热量45 W。该研究结果可为项目后期设计与施工提供了相关参考和依据。
The geotechnical thermal physical properties are of great significance for the design of ground source heat pump (GSHP) system. In this paper, geotechnical thermal response test based on lineal heat source model was used to evaluate the geotechnical thermal physical properties of one GSHP project in Weinan city, Shaanxi province. Result of the 58-hour test data analysis showed that the thermal conductivity of soil in this area was 2.16 W/(m∙K), the specific heat capacity of soil l in this area was 2.39 MJ/(m3∙K), the heat exchange per meter of the single U pipe ground-coupled heat exchanger was 45 W. This work can provide some guides for further design and construction.
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