The Influence of Oil on Pressure Drop of R410A Flow Condensation in Small Diameter Microfin Tube

Abstract

Abstract: The pressure drop characteristics of R410Aoil mixture flow condensation inside a small diameter microfin tube were investigated experimentally, and the effect of oil on frictional pressure drop was analyzed. The results show that, when the vapor quality is lower than 0.6, the presence of oil decreases the condensation frictional pressure drop of R410A, and the decrement can reach up to 12% at the present test conditions; when the vapor quality is higher than 0.6, the presence of oil increases the condensation frictional pressure drop of R410A, and the increment can reach up to 13% at the present test conditions. A new correlation of frictional pressure drop for R410Aoil mixture flow condensation inside small diameter microfin tubes was developed based on the mixture properties, and it can agree with 94% of the experimental data within a deviation of ±30%.

Key words: microfin tube, condensation, pressure drop, R410A, oil

CLC Number:

TK 124

HU Hai-Tao-1, HUANG Xiang-Chao-1, DING Guo-Liang-1, DENG Bin-2, ZHENG Yong-Xin-3, GAO Yi-Feng-3, SONG Ji-3. The Influence of Oil on Pressure Drop of R410A Flow Condensation in Small Diameter Microfin Tube[J]. Journal of Shanghai Jiaotong University, 2012, 46(04): 515-519.

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