并联和串联连接的竖直双U型埋管地热换热器热短路的分析  

Comparative Analysis of Thermal Interference between Pipes of Double U-tube Geothermal Heat Exchangers Installed in Parallel and in Series

作　　者：范军[1] 刘福胜[1] 胡玉秋[1] 

机构地区：[1]山东农业大学水土学院,泰安271018

出　　处：《制冷与空调（四川）》2014年第2期219-222,共4页Refrigeration and Air Conditioning

基　　金：山东省科技发展项目(2012GNC11401)

摘　　要：利用地热换热器准三维传热模型,采用数值计算的方法对并联和串联布置竖直双U型埋管地热换热器支管间的热短路进行了分析;讨论了不同支管间距、不同回灌材料导热系数、不同深度,不同管内流量情况下的热短路。结果表明:并联连接的要比串联连接的热短路影响小。By use of quasi-3D model of heat transfer and numerical simulation method, this article gives analysis of thermal interference between pipes of double U-tube geothermal heat exchangers installed in parallel and in series. Influences of pipes’ intervals, heat conductivity of borehole grout, depth of borehole, flow rate in pipes on thermal interference are discussed. Results shows that heat exchangers installed in parallel are better than those installed in series for reducing thermal interference.

关 键 词：地源热泵 双U型管地热换热器 热短路 并联 串联 

分 类 号：TK523[动力工程及工程热物理—热能工程]