摘要
基于单U竖直地埋管换热器的热渗耦合传热模型模拟分析了夏季工况下地下水流动对地埋管换热器的影响,发现有渗流土壤中随着地下水流速的增加,地埋管换热器单位井深换热量升高,出口水温降低,并且地埋管区域换热达到稳定的时间会缩短,而且使换热器换热达到稳定时能够保持较高的换热量和较低的出口水温。
This paper conducted a study on the effects of groundwater flow on borehole heat exchange based on the model of coupled conduction and groundwater advection established for the simulation of single U-tube BHE （Borehole Heat Exchanger） under summer condition. These simulations show that the increasing of groundwater flow velocity increase trans- ferring heat per unit of borehole depth increase and decrease outlet water temperature of BHE, also, it decrease the time be- fore BHE working under stable condition and keep a higher heat transfer rate and lower outlet temperature when BHE work- ing under stable condition.
关键词
土壤源热泵
地埋管换热器
地下水渗流
单位井深换热量
出口水温
ground source heat pump
borehole heat exchanger
groundwater flow
transferring heat per unit of borehole depth
outlet water temperature
