U型垂直埋管周围土壤温度场的数值模拟

Numerical simulation on ground temperature field around U-vertical buried pipe

针对土壤源热泵地下垂直U型埋管,建立周围土壤的非稳态温度场的数学模型,并利用MAT-LAB软件进行求解。通过对夏季制冷工况的模拟,其结果与实测值非常吻合,并得到土壤温度沿径向、纵向的变化规律及埋管的热作用半径的变化规律,为U型垂直埋管的埋深及间距设计提供参考。

Establishes the transient heat transfer model of the soil temperature field around a vertical U-tube of ground source heat pump, makes numerical simulation using MATLAB. The results meet well with the measurements. Obtains the change rules of the soil temperature with the radial direction, the change rules of the exit water temperature of the buried pipe and the thermal influencing radius in the vertical multi-pipe, which can be reference for the design of the buried depth and distance of the u-vertical buried pipe.