桩埋螺旋管式地热换热器的传热模型  

Solid cylindrical heat source model for pile ground heat exchangers with spiral coils

作　　者：刘俊红[1] 张文克[1] 方肇洪[1] 

机构地区：[1]山东建筑大学建筑节能技术山东省重点实验室,山东济南250101

出　　处：《山东建筑大学学报》2010年第2期95-100,共6页Journal of Shandong Jianzhu University

基　　金：国家自然科学基金项目(50946039)

摘　　要：针对现有桩埋管地热换热器构造形式的不足,提出了桩埋螺旋管式地热换热器。在分析竖直钻孔埋管地热换热器传热模型的基础上,提出了适合桩埋螺旋管式地热换热器的实心圆柱面热源模型,并用格林函数法求得了该模型的两个一维解析解表达式。计算分析表明:新的实心圆柱面模型不仅适用于桩埋螺旋管换热器的传热分析,在应用于竖直钻孔埋管地热换热器的短时间传热分析时,也优于传统的线热源模型和空心圆柱面模型。A pile ground heat exchanger with spiral coils is devised to overcome the shortcomings in configuration of existing pile ground heat exchangers.A solid cylindrical heat source model is proposed for the pile ground heat exchanger based on analysis of two classical models for vertical borehole ground heat exchangers,and two analytical expressions of model solution are acquired by the Green function method.The calculation and analysis illustrate that the proposed new solid cylindrical heat source model is applicable to the pile ground heat exchanger with spiral coils,and the new model is superior to the traditional line source model and the hollow cylindrical source model when used for short-term thermal analysis of borehole ground heat exchangers.

关 键 词：地源热泵 桩埋管地热换热器 螺旋管 传热模型 

分 类 号：TK529[动力工程及工程热物理—热能工程]