【作者】 卿菁； 王勇；

【Author】 Qing Jing;Wang Yong;China Southwest Architectural Design & Research Institute Co.,Ltd;Key Laboratory of the Three Gorges Reservoir Region’s Eco-Envi.,Ministry of Edu.,Chongqing Univ.;National Center for International Research of Low-carbon and Green Buildings,Chongqing Univ;

【机构】 中国建筑西南设计研究院有限公司； 重庆大学山峡库区生态环境教育部重点实验室； 重庆大学低碳绿色建筑国际联合中心；

【摘要】 本次采用热响应实验方法,在加热量相同的前提下,分别运行埋深为1.8m层和2.2m层的水平蛇形地埋管系统。还分别建立了与实验工况条件一致水平蛇形地埋管与土壤换热耦合数值计算模型,利用CFD软件求解,分别比较分析埋深为1.8m层和2.2m层水平蛇形地埋管与土壤换热数值计算工况和实验工况,发现数值计算结果与实验结果吻合较好,从而证明实验结果是可用的。比较实验工况下单独开启1.8m层和单独开启2.2m层水平蛇形地埋管与土壤换热数进出口水温、土壤平均传热系数K随时间的变化,得出埋深为2.2m层的水平蛇形地埋管与土壤换热的换热性能远远优于埋深为1.8m层的水平蛇形地埋管的结论。更多还原

【Abstract】 By thermal response test,two serpentine horizontal buried pipe heat exchangers which can run by oneself at the depth of 1.8m and 2.2m in soil are bulit at the same condition.Then the numerical models of serpentine horizontal buried pipe heat exchangers are established at the depth of 1.8 m and 2.2 m respectively.Using CFD software,the numerical calculation result is analyzed and compared with the thermal response test result.The result of the numerical model and the thermal response test match well,which prove that the experimental results are available.The pipe import/export temperature and the average heat transfer coefficient of serpentine horizontal buried pipe heat exchangers at the depth of 1.8 m and 2.2 m changing along with time are analyzed and compared.Wecan draw a conclusion that heat transfer performance of the serpentine horizontal buried pipe heat exchangers at the depth of 2.2 m is much better than that at the depth of 1.8 m.更多还原