Experimental Investigation on Condensation Heat Transfer of R22 and R417A outside Horizontal Enhanced Tubes

doi:10.3969/j.issn.0253-4339.2009.04.031

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Experimental Investigation on Condensation Heat Transfer of R22 and R417A outside Horizontal Enhanced Tubes

更新时间：2025-02-26

- Experimental Investigation on Condensation Heat Transfer of R22 and R417A outside Horizontal Enhanced Tubes
- Journal of Refrigeration Issue 4, (2009)
- 作者机构：
  
  上海理工大学,上海,200093
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0253-4339.2009.04.031
  CLC：
- Published：2009
- 稿件说明：
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Experimental Investigation on Condensation Heat Transfer of R22 and R417A outside Horizontal Enhanced Tubes[J]. Journal of refrigeration, 2009, (4).
DOI：

Experimental Investigation on Condensation Heat Transfer of R22 and R417A outside Horizontal Enhanced Tubes[J]. Journal of refrigeration, 2009, (4). DOI： 10.3969/j.issn.0253-4339.2009.04.031.

摘要

用实验的方法研究了非共沸工质R417A在水平强化换热管管外的凝结换热性能

并与R22做了对比.试验管为两种强化换热管-斜翅管和矩翅管.结果表明:对于斜翅管

同等的壁面过冷度下

R417A的凝结换热系数大于R22的管外换热系数;对于矩翅管

同等的壁面过冷度下

R22的凝结换热系数大于R417A的凝结换热系数;在工质R417A下

两种强化管的凝结管外换热系数随壁面过冷度的变化率都比R22大

其原因应该与R417A作为一种非共沸制冷剂的温度滑移特性有关.从强化换热的角度考虑

对于表面张力较小的工质

选用斜翅管更有利.

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Related Institution

Central south university

中原工学院

[1]上海理工大学城建学院上海200093 [2]江苏萃隆铜业有限公司江苏常熟

[1]华北电力大学动力工程系,北京102206 [2]西安交通大学能源与动力工程学院

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