流体机械Issue(12)：77-81,38,6.DOI:10.3969/j.issn.1005-0329.2014.12.017
U 型垂直地埋管换热器性能的影响因素分析
Analysis on Influence Factor for the Performance of Vertical Ground Source U-tube Heat Exchanger
刘永 1柏祥华1
作者信息
- 1. 海军驻南京地区航天机电系统军事代表室，江苏南京 210006
- 折叠
摘要
Abstract
In order to understand the influences of different design parameters on the performance of heat exchanger,a three di-mensional computational fluid dynamics simulation for the performance of ground source heat exchanger with tube length ranging from 60 m to 200 m was performed.The research results show that,the fluid inlet temperature,the fluid velocity and initial ground temperature significantly affect the heat exchanger performance.The recommended fluid velocity is about 0.5 m/s by considering both the heat flux and pressure drop.The influences of density and specific heat of backfill and soil are smaller than that of ther-mal conductivity.The simple mathematic models for predicting the influences of density,specific heat and thermal conductivity of backfill and soil on heat flux are developed,and agree well with the CFD results.With the increase of heat exchanger length from 60 m to 200 m,the heat flux decreases,and the influencing radius decreases.关键词
U 型垂直地埋管换热器/性能/影响因素Key words
vertical ground source U-tube heat exchanger/performance/influence factor分类
机械制造引用本文复制引用
刘永,柏祥华..U 型垂直地埋管换热器性能的影响因素分析[J].流体机械,2014,(12):77-81,38,6.
