“U”型管式井下换热器的导热模型  

“U” SHAPED DOWNHOLE HEAT EXCHANGER PERFORMANCE MODELING WITH A CONDUCTION MODEL

作　　者：戴传山 

机构地区：[1]天津地热研究培训中心

出　　处：《天津大学学报》1996年第4期563-568,共6页Journal of Tianjin University(Science and Technology)

摘　　要：建立一个新的描述“Ｕ”型管式地热井下换热器的导热模型．分析地下岩层的温度分布、井下换热器进口水温及流量变化对井下换热器热输出的影响。A theoretical model describing U shaped downhole heat exchanger (DHE) performance is presented in this paper. The initial matrix temperature profile where DHE is located consists of two parts: the conduction dominated part at the upper section and the convective dominated part at the lower section along a geothermal well, respectively. This paper also presents a calculating example which illustrates the effects of geometrical parameters of DHE, the physical properties and temperature distribution around the well on heat output.

关 键 词：地热 井下换热器 温度梯度 导热 U型管式 

分 类 号：TK529[动力工程及工程热物理—热能工程] TK172