Two-phase flow boiling characteristics of alternatives to R-22 inside air/refrigerant enhanced surface tubing

✍ Scribed by Samuel M. Sami; Daniel E. Desjardins

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 151 KB
• Volume: 24
• Category: Article
• ISSN: 0363-907X
• DOI: 10.1002/(sici)1099-114x(200002)24:2<109::aid-er565>3.0.co;2-g

✦ Synopsis

In this paper, an experimental study on the heat transfer characteristics of two-phase #ow boiling of alternative zeotropic refrigerant mixtures to R-22, on air/refrigerant horizontal enhanced surface tubing is presented. The new alternatives considered in this study are: R-507, R-404A, R-408A, R-407C, and R-410A.

The experimental data showed that R-22 has the highest heat transfer rate compared to the other blends in the range investigated. Furthermore, it was also quite evident from these data that R-410A has the highest pressure among the blends under investigation for Reynolds number greater than 3.5;10. However, for Reynolds number less than 3.6;10, it appears from the data that R-22 has the highest pressure drop compared to other refrigerants under investigation.