地源热泵桩基与钻孔埋管换热器换热性能比较  

Comparative Analysis of Heat Exchange Performance of Energy Piles and Borehole Heat Exchangers in GSHP System

作　　者：桂树强[1] 程晓辉[1] 张志鹏 

机构地区：[1]清华大学土木工程系,北京100086 [2]南京丰盛新能源科技股份有限公司,南京210012

出　　处：《土木建筑与环境工程》2013年第3期151-156,共6页Journal of Civil,Architectural & Environment Engineering

基　　金：清华-MIT-剑桥三校低碳大学联盟基金(300907001)

摘　　要：相对于钻孔埋管换热器,桩基埋管换热器在换热性能和经济性方面均具有较大优势,目前越来越广泛的应用于地源热泵工程中。围绕钻孔与桩基埋管换热器的结构特点和换热机理进行对比分析,针对南京某项目桩基埋管换热器开展了换热性能实测及数值模拟分析,并采用数值模拟手段对比分析了钻孔与桩基埋管换热器的换热性能差异。研究结果进一步证明了桩基埋管换热器具有良好的换热性能。提出的传热性能数值模拟方法可较准确地计算出桩基和钻孔埋管换热器的传热效率。Due to their enhanced cost-effectiveness and efficiency over traditional borehole exchangers, energy piles are increasingly used in Ground Sourced Heat Pump （GSHP） projects. In this paper, the structural characteristics of these two types of heat exchangers and their heat transfer mechanism were discussed firstly. The thermal response tests （TRT） were performed on two testing energy piles in one GSHP project in Nanjing, China. The TRT results were then used to verify the numerical simulations, which suggests that the heat exchange performance of energy piles is superior to that of the traditional borehole exchangers. Meanwhile, the numerical simulation method used in this paper was considered applicable to the optimization design of ground heat exchangers in GSHP svstem

关 键 词：地源热泵 换热器 换热性能 

分 类 号：TU831.7[建筑科学—供热、供燃气、通风及空调工程]