太阳能-地源热泵系统双地埋管群利用方式研究

以天津地区一项太阳能地源热泵系统工程实例为研究对象,针对其太阳能储热利用率较低的问题提出了将其两个地埋管群互通互联的解决方案。通过对每个系统进行20年的模拟预测,发现采用了互通互联的两个系统储热利用率较原系统有所增加,系统COP得到了提升。双机组双地埋管群系统运行20年的平均COP可达3.54,单机组双地埋管群系统运行20年的平均COP可达3.36,分别比双机组独立地埋管群系统提高7.9%和2.4%。双地埋管群的改造方案的优越性明显,为太阳能地源热泵系统的应用提供借鉴。

Study on the utilization mode of double buried pipe groups of a solar-ground source heat pump system

This paper analyzes the operation results of a solar-ground source heat pump system in Tianjin, and puts forward a solution to interconnect the two buried pipe groups to solve the problem of low utilization rate of solar heat storage. By 20-years simulation predicting of each system, it showed that the two systems with interconnection could result in the increase of the utilization rate of heat storage and the system coef-ficient of performance (COP). The average COP of the dual-unit double-buried system will be up to 3.54, and the average COP of the single-unit double-buried system will reach 3.36 for 20 years, which is 7.9% and 2.4% higher than that of the double unit one-buried system. The advantages of the retrofitting scheme of double buried pipes are obvious. The results can provide reference for the application of solar-ground source heat pump system.