浅层地埋管热交换器换热能力分析

Analysis of Heat Exchange Capability of Underground Heat Exchangers

采用自主研发的浅层地下岩土热物性测试平台,通过模拟冬夏季取放热实际运行工况,对不同工况下地源热泵地埋管热交换器的换热能力进行了实际测试,分析了地埋管换热器与周围地下岩土之间的换热状况,确定了该地区地源热泵系统地埋管换热器冬夏季工况下的实际单位延米换热量。同时,根据测试数据推算出了该地区地下岩土的综合导热系数,体积热容等热物性参数,为该地区地源热泵系统的模拟分析以及设计施工提供了依据。

By simulating the operation conditions of drawing-heat from soil in winter and heat-releasing in summer on a self-developed shallow soil thermal properties testing system, the heat exchange capability of underground heat exchangers of ground source heat pump was tested and the heat exchange conditions between underground heat exchangers and the surrounded soil was analyzed. The actual ground heat exchanger per unit meter for heat pipe was determined in this area. Qn the basis of simulating results, the thermal properties of this area were calculated and the basic data for designing and construction of ground source heat pump system was provided.