Two-phase flow resistance of refrigerants R-22, R-410A and R-407C in small diameter tubes

Chi-Chuan Wang, Shi Kuo Chiang, Yu Juei Chang, Tsair Wang Chung

研究成果: Article

20 引文 斯高帕斯(Scopus)

摘要

The two-phase frictional characteristics of refrigerants R-22, R-407C, and R-410A in small diameter tubes are reported. Tests were performed in 3, 5, 7, and 9mm diameter tubes. The range of mass velocities ranges from 50 to 700 kg m-2 s-1. It is found that for a fixed mass flux, saturation temperature and quality, the pressure drops for R-22 are higher than those of R-407C and R-410A. The predictive ability of existing correlations such as the Friedel correlation, the homogeneous model, and the Souza and Pimenta correlation are comparable at a mean deviation of 30 ∼ 35%. However, the predictive ability of the Chisholm correlation is quite poor. Based on the test results of this study and other investigations, modifications to the homogeneous model and the Chishom correlation are made; the relevant mean deviations of the modified correlations are around 17 ∼ 18%.

原文English
頁(從 - 到)553-560
頁數8
期刊Chemical Engineering Research and Design
79
發行號5
DOIs
出版狀態Published - 1 一月 2001

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