竖直双U型埋管地热换热器支管间热短路分析

Analysis of thermal interference between pipes of double U-tube geothermal heat exchanger

采用地热换热器准三维传热模型和数值计算的方法,对竖直双U型埋管地热换热器支管间的热短路进行了分析,讨论了管间距和回灌材料的导热系数对热短路的影响,并提出了减少热短路的措施。

Quasi-3D model and numerical simulation method were used to analyze thermal interfer- ence between pipes of double U-tube geothermal heat exchanger. Intervals of pipes and heat conduc- tivity of borehole grout were studied to discuss their influences on thermal interference. Then measures for reducing thermal interference were proposed.