地源热泵U型埋管换热影响因素的数值模拟与分析

Simulation and Analysis of the Effect Factor on the Heat Transfer in the U-tube of Grund Source Heat Pump

用GAMB IT软件建立了单U形管换热器与周围土壤换热的物理模型并进行了网格划分,用FLUENT进行了数值计算,分析土壤的导热性能、回填材料的导热性能、换热器进口水温及流速大小、钻井深度、管腿中心距和换热器管材等因素对换热器性能的影响,得出了一些对工程实践有用的结论。

Physics model of single U tube which conduct heat with ambient soil was set up by GAMBIT software and plot gridding. Numerical calculation was carried by fluent. It was analyzed the effect of heat transfer properties of soil and backfill material, the temperature and velocity of the water in the tube, the depth of the borehole, the distance between two branch tube and the material of the tube on the heat transfer in U-tube. Obtain some conclusion which is useful in engineering.