挤密条件下U型地埋管换热器换热效率的理论分析及数值模拟  

Theoretical Analysis and Numerical Simulation of Heat Exchange Efficiency of U-Tube Ground Heat Exchanger Under the Condition of Soil Compaction

作　　者：陈宝义[1] 岳韬[1] 曹品鲁[1] 王如生[1] 王茂森[1] 博坤[1] 龙翔[1] 鲁思宇 Chen Baoyi Yue Tao Cao Pinlu Wang Rusheng Wang Maosen B Kun Long Xiang Lu Siyu(Construction Engineering College of J ilin University, Changchun 130026,China)

机构地区：[1]吉林大学建设工程学院,长春130026

出　　处：《吉林大学学报（地球科学版）》2016年第6期1808-1814,共7页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目(51174097)~~

摘　　要：土层的导热系数是影响地源热泵地埋管换热器换热效率的重要因素之一,与土样的密度密切相关。为了提高地源热泵换热器换热效率,本文基于柱热源理论,建立了挤密钻进条件下换热器的传热理论模型,对换热器的换热效率进行了计算,并利用Ansys有限元软件对土层挤密条件下换热器的换热效果进行了数值分析。结果表明,与传统方法相比,土层挤密可有效降低钻孔周围的热阻,U型管换热器的换热效率可提高17%~20%。The coefficient of thermal conductivity of soil, which has close relationship to the density of the soil, is one of the important factors that impact the heat transfer efficiency of ground heat exchanger （GHE）. In order to enhance the heat transfer efficiency of ground source heat pump heat exchanger. The heat transfer model of GHE under the condition of compaction drilling based on the cylindrical heat source theory has been established and thermal efficiency of heat exchanger has been calculated in this paper. Finally the heat transfer efficiency of GHE under the condition of soil compaction have been simulated using Ansys finite element software .With comparison to the traditional methods, the soil cdmpaction can effectively reduce the thermal resistance around the borehole and the heat transfer efficiency of U-tube heat exchanger can be enhanced by 17%-20%.

关 键 词：地源热泵 地埋管换热器 挤密钻进 土层挤密 

分 类 号：TK521.2[动力工程及工程热物理—热能工程]