土壤源热泵垂直U型地埋管换热的数值模拟.pdf

第28 卷第4 期 建 筑 热 能通 风 空 调 Vol.28 No.4 2009 年8 月 Building Energy Environment Aug. 2009.45~47 文章编号：1003-0344 （2009）04-045-7 土壤源热泵垂直U 型地埋管换热的数值模拟 1 1 2 连小鑫 刘金祥 陈晓春 1 南京工业大学城市建设与安全工程学院 2 中国建筑设计研究院 摘 要：本文建立了垂直U 型地埋管三维数值传热模型，采用FLUENT 软件对其非稳态的流固耦合换热进行研 究。在夏季工况下，模拟结果与实验相吻合。分析了回填材料导热系数、管内流速以及埋深对垂直U 型地埋管换热 的影响。计算结果表明，地埋管的单位埋深换热量与埋深成反比，而与流速和回填材料的导热系数成正比。 关键词：土壤源热泵垂直U 型地埋管数值模拟 Numerical Simulation of Vertical U-tube Underground Heat Exchanger for GSHP 1 1 2 LIAN Xiao-xin , LIU Jin-xiang , CHEN Xiao-chun 1 College of Urban Construction and Safety Engineering, Nanjing University of Technology 2 China Architecture Design Research Group Abstract: A three-dimensional numerical heat transfer model of vertical U-tube underground is proposed in this paper, which is for researching fluid-structure coupled heat exchanger based on FLUENT software. The result of the numerical simulation is in accordance with the experiment on summer conditions. Effect of thermal conductivity of backfill, fluid velocity and the buried depth on the heat transfer of vertical U-tube underground heat exchanger was analyzed. The calculations show that the heat transfer of ground heat exchanger for unit depth is inversely proportional to buried depth while directly proportional to fluid velocity and thermal conductivity of backfill. Keywords: GSHP, vertical U-tube underground heat exchanger, numerical simulation 土壤源热泵以其节能环保的特点，在我国受到的 水平方向上的二维