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中国科学院大学学报 ›› 2013, Vol. 30 ›› Issue (3): 311-316.DOI: 10.7523/j.issn.1002-1175.2013.03.005

• 物理学 • 上一篇    下一篇

地埋管地源热泵系统二维和三维管群换热模型的对比分析

贾亚北, 王勇   

  1. 重庆大学三峡库区生态环境教育部重点实验室, 重庆 400045
  • 收稿日期:2012-04-06 修回日期:2012-05-11 发布日期:2013-05-15
  • 通讯作者: 王勇, cqwangyong@cqu.edu.cn
  • 基金资助:

    中央高校基本科研业务费(CDJZR11210001)资助 

Comparative analyses on 2D and 3D buried tube-group heat transfer models in GCHP system

JIA Ya-Bei, WANG Yong   

  1. Key Laboratory of the Three Gorges Reservoir Regions Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
  • Received:2012-04-06 Revised:2012-05-11 Published:2013-05-15

摘要:

以实际工程为研究对象,分别建立垂直U型地埋管管群的二维和三维非稳态传热模型. 以Fluent作为计算工具,进行系统运行15年的换热耦合计算,得到不同换热条件下的土壤温度变化曲线. 以三维模型数值计算结果为对比条件,以拟合优度为参照参数,对二维传热模型的应用条件进行了分析.

关键词: 地埋管地源热泵, 管群换热器, 三维计算模型, 二维计算模型

Abstract:

Choice of a heat transfer model for buried tube-group heat exchangers (GHEs) is the key to accurate calculation of the heat exchange of GHEs in ground-coupled heat pump (GCHP) system. Based on practical projects, the 2D and 3D unsteady heat transfer models of vertical U-tube GHEs are constructed. With Fluent as a computational tool,the heat coupled calculations for a period of 15 years are carried out and soil temperature variation curves are obtained. By taking the 3D model numerical results as benchmark and goodness-of-fit as reference parameter, application conditions for the 2D model are analyzed.

Key words: ground-coupled heat pump, pipe-group heat exchangers, 3D calculation model, 2D calculation model

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