地下水补给区季节温度变化对地埋管换热性能的影响  

Influence of seasonal temperature fluctuation of groundwater in the recharge area on the performance of borehole heat exchanger in summer

作　　者：郭毅 王静[1] 刘峰[2] 王华军[1] GUO Yi;WANG Jing;LIU Feng;WANG Huajun(School of Energy and Environment Engineering,Hebei University of Technology,Tianjin 300401,China;Institute of Hydrogeology and Environment Geology,Chinese Academy of Geological Sciences,Shijiazhuang,Hebei 050061,China)

机构地区：[1]河北工业大学能源与环境工程学院,天津300401 [2]中国地质科学院水文地质环境地质研究所,河北石家庄050061

出　　处：《河北工业大学学报》2018年第2期108-112,共5页Journal of Hebei University of Technology

基　　金：国家自然科学基金(41402231);河北省自然科学基金(E2015202181)

摘　　要：建立了地下水补给区季节温度变化条件下地埋管换热器的三维模型.以夏季工况为例,进行了传热过程数值模拟,并定量分析了含水层渗流速度、含水层厚度、补给区距离等因素的影响.结果表明,距离地下水补给区越近,地埋管周围含水层温度的年周期变化幅度越大,换热性能更倾向于受季节水温变化与渗流速度变化的二者耦合影响,且表现出不同程度的季节效应.随含水层厚度增加,地埋管单位井深换热量总体上呈线性增大趋势.A three-dimensional model of a borehole heat exchanger(BHE)under seasonal temperature fluctuation of groundwater in the recharge area is established.The heat transfer performance of BHE in summer is simulated numerically,and the influence factors including the seepage velocity,the thickness of aquifers and the distance from the recharge area are analyzed.The results show that for the sites near the recharge area of groundwater,the seasonal temperature fluctuation of aquifers around the BHE becomes bigger,where the heat transfer performance of the BHE tends to be determined by the coupled effect of both groundwater temperature fluctuation and the seepage velocity.The heat transfer rate per borehole depth increases linearly with the increase of the thickness of aquifers.

关 键 词：地埋管换热器 换热性能 含水层 季节温度变化 

分 类 号：TU832[建筑科学—供热、供燃气、通风及空调工程]