地源热泵双U型地埋热交换器的热分析

Thermal Analysis of Buried Double U-Tube Heat Exchanger for Ground Source Heat Pump

利用双U型地埋管换热器,地源热泵可实现地热供暖和土壤储存太阳能的同时进行.本文针对地源热泵平行布置的双U型换热器进行了热分析.对比不同运行工况及布置形式,通过对比之后可以得出引入回热之后,热泵循环U型管出口水的温度升高3～4℃.此外,回热循环位于外侧时,土壤中回热量相对较多.文中结果与已有的实验符合较好,所得结果可为地源热泵双U型地埋热交换器的推广和应用提供指导.

Due to the application of the buried double U type heat exchanger, the use of the ground source energy and the store of the solar energy can be conducted at the same time. In this paper, thermal analysis of the ground source heat pump with double U type heat exchanger in parallel was conducted. Due to the addition of the heating cycle, there exits 3~4~C increase in the buried U-tube outlet water temperature of the heat pump circulating trader the long-term continuous operation. In addition, the more heat can be stored in the soil for the outside arrangement of heating cycle. The simulation analysis are conformed with the existing experiment, so all these results should be taken into account for a better design of the buried double U type heat exchanger for the ground source heat pump.