桩基螺旋埋管换热器的二维温度场分析  

The 2-D thermal analysis of the coil ground heat exchanger inside piles

作　　者：石磊[1] 张方方[1] 林芸[1] 李新[1] 方肇洪[1] 

机构地区：[1]山东建筑大学热能工程学院,山东济南250101

出　　处：《山东建筑大学学报》2010年第2期177-183,共7页Journal of Shandong Jianzhu University

基　　金：国家自然科学基金项目(50946039)

摘　　要：主要以桩基地热换热器的工程应用为背景,提出实心圆柱面热源模型以描述螺旋埋管地热换热器中的传热过程。采用格林函数和虚拟热源法,导出适用于桩基螺旋埋管换热器的无限长及有限长面热源模型的温度分布解析解,对模型中的各参数对换热性能的影响做了分析。同时,对有限长面热源模型中的两种代表性温度,即热源面的积分平均温度和圆柱面中点温度分别进行了计算和讨论。In view of its engineering applications of the coil ground heat exchanger inside foundation piles,a solid cylindrical heat source model is proposed to describe the heat transfer process of the spiral coil ground heat exchangers.By means of the green function method and the virtual heat source approach analytical solutions have been derived,applicable for temperature distribution of the one-or two-dimensional cylindrical heat source models with infinite and finite length.The geometrical and physical parameters which impact on this heat transfer process have been analyzed and discussed accordingly.Besides,two representative temperatures,i.e.integral average temperature and mid-point temperature on cylindrical surface,are also calculated and discussed.

关 键 词：地源热泵 桩埋管 传热模型 解析解 

分 类 号：TK529[动力工程及工程热物理—热能工程]