埋管换热器热阻分析  

Thermal resistance analysis for ground heat exchanger

作　　者：石零[1] 韩书勇[1] 余新明[1] 

机构地区：[1]江汉大学化学与环境工程学院,武汉430056

出　　处：《低温与超导》2011年第12期61-63,共3页Cryogenics and Superconductivity

基　　金：武汉市科技计划项目(200851799524-04)

摘　　要：地源热泵系统中的竖直埋管换热器是地源热泵系统的一个关键部分,从U管内至岩土间的传热热阻影响热泵系统的性能。文中介绍在静态负荷下,利用垂直U型埋管换热器换热的一维模型和二维模型,从传热热阻的角度进行了埋管管径、钻孔直径与管内对流热阻、钻孔热阻间的分析,结果显示,对钻孔热阻与管径的优化选择可降低热阻,同时对提高埋管换热器的换热效率、优化埋管换热器的设计具有指导意义。The heat exchanger of buried U - tube is a key component in the Ground - source heat pump system. The heat transfer resistance from the U - tube to the soil affects the ability of the ground - source heat pump system. It was analyzed that the relationship of the diameter of the U - tube, the bore - hole diameter with convection thermal resistance and bore - hole, using the one - dimension and two - dimension model under static load. The results show that bore - hole thermal resistance can decrease by optimizing the U - tube diameter and the bore - hole diameter, at the same time, it is important to improve the efficiency of the heat exchanger, guide the design of heat exchanger.

关 键 词：热泵系统 埋管换热器 对流热阻 钻孔热阻 

分 类 号：TQ051.14[化学工程]