Heat Transfer of Condensation Augmentation of Immiscible R-113 and Water in a Horizontal Tube

朱冬生; 谭盈科

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Heat Transfer of Condensation Augmentation of Immiscible R-113 and Water in a Horizontal Tube

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- Heat Transfer of Condensation Augmentation of Immiscible R-113 and Water in a Horizontal Tube
- CIESC Journal Issue 3, (1990)
- 作者机构：
  
  华南理工大学化学工程研究所,华南理工大学化学工程研究所 ,广州,广州
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 June 1990，
  
  Published：25 June 1990
- 稿件说明：
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朱冬生, 谭盈科. Heat Transfer of Condensation Augmentation of Immiscible R-113 and Water in a Horizontal Tube[J]. CIESC Journal, 1990, (3).
DOI：

朱冬生, 谭盈科. Heat Transfer of Condensation Augmentation of Immiscible R-113 and Water in a Horizontal Tube[J]. CIESC Journal, 1990, (3). DOI：

摘要

本文以R-113和水为混合工质

在水平光滑管和七种管型的内螺旋翅片管内进行不互溶混合工质蒸汽的冷凝传热研究.根据光管实验

发现冷凝液相的流动结构是影响传热的主要因素

建立了凝液两相流动的三个流动模型;并据此获得提高管内传热膜系数之途径.

Abstract

The heat transfer in forced convective condensation of immiscible R-113 and water in a horizontal smooth tube was studied experimentally. Seven types of internal spiral fin (ISF) tubes were used for studying the mechanism of heat transfer augmentation both for smooth tube and ISF tubes. The experimental results indicated that water and liquid R-113 flow patterns during condensation controlled the heat transfer rate and the mechanism was very complex. However

the flow patterns can be generally considered to be one of three ideal types

i. e 1. channeling flow; 2.standing-drop flow; 3. film-drop flow. The channeling flow model which assumed that heat transfer resistance of water and R-113 were in parallel was verified by the experiments. The heat transfer coefficient of channeling flow was larger than that of others. ISF tubes affected the condensate flow patterns and increased the Nusselt number of . tube side condensation by 1

13 to 5.32 times of pure R-113 condensed in a smooth tube with only a little increase in pressure drop.

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