地下水渗流对竖埋管换热器传热影响的数值模拟  

NUMERICALSIMULATION OFEFFECTOFGROUNDWATER SEEPAGE ON VERTICALLY BURIED TUBULAR HEAT EXCHANGER

作　　者：曾召田[1,2] 吕海波[1,2] 赵艳林[1,2] 葛若东[2] 

机构地区：[1]桂林理工大学广西矿冶与环境科学实验中心,桂林541004 [2]广西大学土木建筑工程学院防灾减灾研究所,南宁530004

出　　处：《太阳能学报》2015年第12期3007-3014,共8页Acta Energiae Solaris Sinica

基　　金：国家重点基础研究发展(973)前期研究专项(2010CB434810);国家自然科学基金(51169005;41272358);广西自然科学基金(2013GXNSFBA019233)

摘　　要：地下水渗流对竖埋管换热器与岩土体的热量交换具有显著影响。该文应用地下水渗流理论和传热学理论,建立考虑热传导和地下水渗流共同作用的热渗耦合传热模型;针对南宁河流阶地土层,模拟分析地下水渗流对竖埋管换热器传热的影响。研究结果表明:1)地下水渗流可以强化地埋管的换热,且随着渗流速度的增大,强化换热作用越明显;2)地下水渗流对换热器热交换的影响具有方向性,在此基础上,对竖埋管换热合理的布置方式进行分析;3)南宁河流阶地地区,仅考虑砂砾层存在地下水渗流对换热的影响,更符合工程实际。The effect of groundwater seepage on heat transfer process between vertically buried tubular heat exchanger and rock ＆ soil is significant. The groundwater seepage theory and heat transfer theory were used to establish the transfer model of coupled thermal conduction and groundwater advection. Then, the effect of groundwater seepage on vertically buried tubular heat exchanger was simulated according to the soil layers of Nanning river terrace. The results show that groundwater seepage enhances heat transfer of buried tubular heat exchanger, and the enhanced heat exchange function becomes more obviously when the seepage speed increases. Moreover, there is directionality for effect of groundwater seepage on heat transfer. On the basis, the reasonable arrangement of heat exchanger is simulated. For Nanning river terrace area, it is reasonable to consider that the effect of groundwater seepage on heat exchange only exists in the gravel layer.

关 键 词：地源热泵 地下水渗流 竖埋管换热器 热湿耦合传热模型 数值模拟 

分 类 号：TK529[动力工程及工程热物理—热能工程]