地埋管换热性能综合微缩试验研究  

A comprehensive miniature test study of buried tube heat exchange performance

作　　者：毕文明 岳丽燕[2,3] 韩再生[3] 刘九龙[2] 

机构地区：[1]北京华清荣昊新能源开发有限责任公司,北京102218 [2]天津地热勘查开发设计院,天津300250 [3]中国地质大学(北京)水资源与环境学院,北京100083

出　　处：《水文地质工程地质》2014年第1期144-148,共5页Hydrogeology & Engineering Geology

摘　　要：为研究不同水文地质条件下地埋管换热器与岩土体换热情况,构建了室内地埋管换热器综合微缩实验台,并开展了干砂、饱和砂(不流动)以及饱和砂(流动)三种情况下的相似试验研究,结果表明:干砂、饱和砂和地下水渗流条件下综合导热系数依次增加;温度场范围依次加大,并且渗流对上、下游温度变化分别有阻碍和促进作用;随着渗流速度的加大,地下水将热量带到下游,温度场在水流方向被拉长。文章从试验数据论证了水流作用对地埋管换热影响,对地埋管设计等地埋管热泵的工程应用具有指导意义。In order to study heat-exchange of buried pipe heat exchanger in the rock mass under different condition of groundwater flow, a indoor comprehensive miniature bench of buried pipe heat exchanger is built, and three case of experimental study are implemented , including dry sand, saturated sand （no water flow） and saturated sand（water flow）. The results indicate that the comprehensive thermal conductivity of dry sand, saturated sand and under different condition of groundwater seepage are in turn increases. The range of temperature field in turn increases and the groundwater seepage has an impeded and promote role to upstream and downstream temperature change. With the increasing flow velocity, groundwater bring heat to downstream, the temperature field in the direction of flow is stretched. This paper proved that the groundwater flow has effects on heat-exchange of buried pipe heat exchanger in the rock mass. The results are of significance in the engineering applications of ground-source heat pump.

关 键 词：地埋管换热器 微缩试验 地下水渗流 温度场 

分 类 号：P314[天文地球—固体地球物理学]