出水管绝热对地埋管换热性能影响的实验研究  

Experimental Study on Effect of Outlet Pipe Heat Insulation on Heat Exchange Performance of Buried Tube

作　　者：张华廷 吴蔚兰 付祥钊[2] 

机构地区：[1]中机中联工程有限公司,重庆400039 [2]重庆大学,重庆400039

出　　处：《煤气与热力》2014年第3期8-11,共4页Gas & Heat

基　　金：国家"十一五"科技支撑计划项目(2006BAJ01A06-3)

摘　　要：地埋管换热器出水管热损失的原因为:进出水管之间换热,出水管与钻孔周围上部土壤换热。提出对出水管设置绝热层降低热损失,对绝热长度的确定方法及相关实际工程应用进行介绍。采取定加热流量的方法(模拟夏季工况),对出水管采取绝热措施的效果进行实验研究。出水管绝热对降低出水温度、提高单位孔深换热量均有帮助。The reasons for outlet pipe heat loss of buried tube heat exchanger are heat exchange be- tween inlet and outlet pipes and heat exchange between outlet pipe and upper soil around borehole. The appli- cation of heat insulation layer to the outlet pipe is pro- posed to reduce heat loss. The method for determining the adiabatic length and the related actual engineering applications are introduced. The effect of the outlet pipe heat insulation measures is experimentally studied by fixed heating flow under simulated summer condi- tions. The outlet pipe heat insulation is helpful to re- duce the outlet water temperature and improve the heat exchange at unit hole depth.

关 键 词：地埋管换热器 出水管绝热 绝热长度 出水温度 单位孔深换热量 

分 类 号：TU995[建筑科学—供热、供燃气、通风及空调工程]