期刊论文

Influence of Groundwater Seepage on Heat Transfer Efficiency of Ground Heat Exchanger

中文

建筑热能通风空调

1003-0344

2017

36

2

20-23+27

10.3969/j.issn.1003-0344.2017.02.005

湖南省建设厅课题（湘建科函[2012]409号KY201203）；

本校为第一机构

基于垂直单U型地埋管换热器的实际形状,建立了三维非稳态地下水渗流传热模型,分析了夏季工况下地下水渗流速度、渗流温度、地埋管进水温度以及管内流速对地埋管换热效率的影响。引入换热效率系数来量化地下水渗流对地埋管换热能力的影响程度。结果表明:考虑地下水的渗流可以有效的强化换热效率,对地埋管的传热影响显著;增大地下水渗流速度和减小渗流温度可加强地埋管的换热能力;选取合适的地埋管进水流速可降低系统能耗,增加换热量;根据不同的空调房间负荷,合理设计地埋管进水温度能保证热泵主机的高效运行。

A three-dimensional unsteady heat transfer model of considering the groundwater seepage was established, in which the vertical U-tube Ground Heat Exchanger （GHE） was based on real condition, to conduct a study on the effects of the groundwater seepage velocity, seepage temperature, water inlet temperature, and flow capacity on GHE under summer condition. Heat transfer efficiency （GTE） coefficient was introduced to quantify the extent of the GHE heat exchange ability impact of the groundwater seepage. The results show that groundwater seepag...