添加隔热板对竖直U型地埋管换热器热短路的影响  

Influence of Adding the Insulation Board on Hot Short Circuit of the Vertical U-Tube Ground Heat Exchanger

作　　者：罗朗[1] 余跃进[1] 郑丽鹏 夏雯[1] 

机构地区：[1]南京师范大学能源与机械工程学院,江苏南京210042

出　　处：《南京师范大学学报（工程技术版）》2016年第1期66-71,共6页Journal of Nanjing Normal University(Engineering and Technology Edition)

摘　　要：采用FLUENT模拟软件,建立起U型地埋管换热器三维传热模型.分别模拟了有、无添加隔热板时的工况,对热短路进行数值模拟,分析了对地埋管换热器性能的影响.通过对比两种工况下的温度云图和出口温度监测图,证明了两支管间热短路现象严重,而且添加隔热板后,进出口温差变大可达3.94℃,可使单位井深换热量提升6.13%.The paper simulates with FLUENT software to build three-dimensional heat transfer model of U-tube buriedtube heat exchanger. When adding insulation panels are simulated with and without conditions,to simulate the thermalcircuit,the influence of the performance of ground heat exchanger is analyzed. By comparing the two kinds of workingconditions of temperature and outlet temperature monitoring diagram,simulation proves that the hot short circuitphenomenon is serious between the two branch pipe,and after adding insulation board,the import and export tempera-ture difference can reach 3.94 ℃,and the unit well depth in heat can be made to improve 6.13%.

关 键 词：U型地埋管 隔热板 数值模拟 换热性能 

分 类 号：TK018[动力工程及工程热物理]