钻孔间距和布置形式对地埋管管群传热影响的研究

建立地源热泵管群传热模型,通过数值模拟方法研究钻孔间距和布置形式对管群传热的影响。研究结果表明:钻孔间距增大能够明显减缓管群区域热效率的衰减,叉排布置比顺排布置更优;对于给定数量和钻孔间距的管群,其钻孔布置区域的周长与面积比越大,整个地埋管换热器的效率也就越高。研究结果对于地源热泵地埋管管群的优化设计具有一定的指导意义。

Research on influence of space and arrangement between boreholes on the multi-pipe heat exchanger of GSHP

Builds the heat transfer models of multi-pipe heat exchanger,and studies the influence of space and arrangement between boreholes on the heat transfer performance of multi-pipe heat exchanger of ground source heat pump（GSHP）.The simulation results show that increasing the space between boreholes could slow down the attenuation of thermal effectiveness obviously.Furthermore,compared to aligned arrangement form of boreholes,the performance of heat exchanger is better in crossing arrangement.For the heat exchanger with definite boreholes,the efficiency of entire heat exchanger increases with the increasing of ratio of perimeter and area of the arrangement region.