添加隔热板对竖直U型地埋管换热器换热能力的影响

Influence of Adding Heat Insulation Baffle on Heat Transfer Performance of Vertical U-tube Ground Heat Exchanger

本文就如何减轻竖直U型地埋管换热器2个支管间的热短路损失、提高地源热泵系统的单位井深换热量进行了研究。在对竖直U型地埋管钻孔内准三维传热模型进行研究的基础上,运用数值模拟的方法对竖直U型地埋管换热器有、无隔热板2种情况下的换热能力进行了分析。

In this paper,the study on how to reduce the hot short-circuit loss between two pipes of vertical U-tube ground heat exchanger was carried out,as well as improving the heat exchange capacity of unit well depth.Base on the research of a quasi-three dimensional heat transfer model of vertical U-tube ground heat exchanger＇s borehole,a numerical simulation was conducted to analyze the heat exchange capacity with and without the heat insulation baffle.