FLOW EVAPORATION HEAT TRANSFER AND PRESSURE DROP  IN HORIZONTAL MICRO-FIN TUBES

WU Xiaomin; WANG Xiaoliang; WANG Weicheng

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FLOW EVAPORATION HEAT TRANSFER AND PRESSURE DROP IN HORIZONTAL MICRO-FIN TUBES

更新时间：2025-12-10

- FLOW EVAPORATION HEAT TRANSFER AND PRESSURE DROP IN HORIZONTAL MICRO-FIN TUBES
- CIESC Journal Issue 9, Pages: 1215-1219(2003)
- 作者机构：
  
  清华大学热能工程系,北京,100084
- 作者简介：
- 基金信息：
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  CLC：
- Online First：25 September 2003，
  
  Published：25 September 2003
- 稿件说明：
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WU Xiaomin, WANG Xiaoliang, WANG Weicheng. FLOW EVAPORATION HEAT TRANSFER AND PRESSURE DROP IN HORIZONTAL MICRO-FIN TUBES[J]. CIESC Journal, 2003, (9): 1215-1219.
DOI：

WU Xiaomin, WANG Xiaoliang, WANG Weicheng. FLOW EVAPORATION HEAT TRANSFER AND PRESSURE DROP IN HORIZONTAL MICRO-FIN TUBES[J]. CIESC Journal, 2003, (9): 1215-1219. DOI：

摘要

为了研究微肋管结构尺寸及工况等对管内流动蒸发性能的影响，对4种微肋管和1根9.52 mm光管进行了实验，4根微肋管中管外径为9.52 mm和7 mm的各2根，所用工质为R22.实验中质量流速变化范围为90～400kg8226;m-28226;s-1，所选工况为：蒸发温度7℃，入口干度15%～20%，出口过热度5～6℃.获得了蒸发换热性能随质量流速的变化，讨论了微肋结构尺寸和管径等对蒸发换热性能的影响.两根9.52mm微肋管的传热系数比光管分别分别提高了130%和180%，而其内表面积只比光管分别增加了40%和70%.

Abstract

To investigate the effects of micro-fin geometry and operating conditions on flow evaporation performance of micro-fin tubes

tests were conducted on four micro-fin tubes having different micro-fin geometries and one smooth tube having 9.52mm outside diameter (OD). Two of the micro-fin tubes had 9.52mm OD and the remaining two had 7.0mm OD.The refrigerant used was R22. The experiments were carried out for 90—400kg8226;m-28226;s-1 refrigerant mass fluxes at 7℃ evaporation temperature

15%—20% inlet vapor quality

5—6℃ outlet superheat degrees. The variations of evaporation performance of micro-fin tubes with refrigerant mass flux were obtained. The effects of micro-fin geometry and tube diameter on performance were discussed. The two 9.52mm OD micro-fin tubes yielded 130% and 180% greater heat transfer coefficients than the smooth tube

while the inside surface areas of the two micro-fin tubes were only 40% and 70% greater than that of the smooth tube.

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