地源热泵U型埋管土壤温度场数值模拟

Numerical Simulation of Soil Temperature of U-pipe Geothermal Heat Ppumps

结合相关文献给出原始地温计算式,针对垂直U型埋管换热器建立瞬态传热模型,采用控制容积法对方程进行离散,对换热器周围土壤温度场进行数值模拟。对模拟结果进行分析获得地下埋管换热器的传热特性与土壤温度变化规律,并通过实验数据验证模拟结果的正确性。

This paper presents the equations to determine the temperatures of the undisturbed earth based on relevant literature. A transient heat transfer model for the simulation of the vertical U-tube heat exchanger is built and the controlled equation is dispersed in terms of Finite Volume Method. The temperatures of the soil around the heat exchanger are simulated. Analyse the simulation results and obtain the heat transfer properties of the vertical U-tube heat exchanger and the rule of the change of the soil temperatures. What＇s more the simulation results are verified accurate through the experiment datum.