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为确定地下水渗流对土壤源热泵地埋管换热器周围温度场的影响,以U型地埋管换热器传热系统为例,构建了等效当量直径的单管圆柱换热器传热物理和数学模型,并用多物理场耦合分析软件COMSOLMultiphysics 4.2a对夏季工况下地埋管换热器周围温度场进行数值模拟计算,通过有无渗流条件下不同导热系数、孔隙率土壤温度场变化的对比分析,确定引起温度场变化的主导因素,为下一步试验提供了重要依据。
In order to determine the influence of groundwater seepage on the temperature field around the ground heat exchanger of ground source heat pump, taking the heat transfer system of U type ground tube heat exchanger as an example, a single tube cylindrical heat exchanger of equivalent equivalent diameter Physics and mathematic model. The multi-physics coupled analysis software COMSOLMultiphysics 4.2a is used to simulate the temperature field around the buried pipe heat exchanger under summer conditions. Through the different thermal conductivity and the change of the temperature field of porosity soil Comparative analysis to determine the main factors that cause changes in temperature field provides an important basis for the next test.