上海交通大学学报

上海交通大学学报（自然版）

• 能源与动力工程 • 上一篇    下一篇

润滑油对R410A在小管径水平光管内流动冷凝摩擦压降的影响

黄翔超1，胡海涛1，丁国良1，朱禹1，邓斌2，高屹峰3
  

  1. (1. 上海交通大学 制冷与低温工程研究所，上海 200240；2. 金龙精密铜管集团股份有限公司中国科学院精密铜管工程研究中心，上海 200135；3. 国际铜业协会(中国)上海代表处，上海200020)
  • 收稿日期:2009-12-29 修回日期:1900-01-01 出版日期:2010-10-31 发布日期:2010-10-31

Influence of Oil on Flow Condensation Frictional Pressure Drop of R410A inside Small Diameter Horizontal Smooth Tubes

HUANG Xiangchao1,HU Haitao1,DING Guoliang1，ZHU Yu1,DENG Bin2,GAO Yifeng3
  

  1. (1. Institute of Refrigeration and Cryogenics Engineering, Shanghai Jiaotong University, Shanghai 200240, China; 2. Institute of Heat Transfer Technology, Golden Dragon Precise Copper Tube Inc., Shanghai 200135, China; 3. International Copper Association Ltd., Shanghai 200020, China)
  • Received:2009-12-29 Revised:1900-01-01 Online:2010-10-31 Published:2010-10-31

摘要： 实验研究了润滑油对R410A在外径3、5 mm光管内流动冷凝摩擦压降的影响.研究表明，润滑油的存在减小了R410A在光管内的冷凝摩擦压降，R410A油混合物的摩擦压降比纯R410A的摩擦压降最大下降了19%；润滑油降低冷凝摩擦压降的影响随着平均油浓度的增大而增大，而随着质流密度和干度的增大而减小.基于混合物性建立了适用于R410A油混合物在小管径光管内流动冷凝的摩擦压降关联式，该关联式的预测值与实验值误差为-20% ~ +30%.

关键词: R410A, 润滑油, 光管, 冷凝, 压降, 关联式

Abstract: Influence of oil on flow condensation frictional pressure drop of R410A inside 5 mm and 3 mm O.D. horizontal smooth tubes was investigated experimentally. The research results show that the presence of oil always decreases the flow condensation frictional pressure drop of R410A inside smooth tubes, and the decrement can reach up to 19% at the present test conditions; the decrement increases with the increase of nominal oil concentration, and decreases with the increase of mass flux and vapor quality. A new correlation of frictional pressure drop for R410Aoil mixture flow condensation inside small diameter smooth tubes was developed based on the mixture properties, which agrees with all the experimental data within the deviation of -20% ~ +30%.

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