Boiling characteristics of alternatives to R-502 inside air/refrigerant enhanced surface tubing

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

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 140 KB
• Volume: 24
• Category: Article
• ISSN: 0363-907X
• DOI: 10.1002/(sici)1099-114x(200001)24:1<27::aid-er564>3.0.co;2-o

✦ Synopsis

In this paper, an experimental study on the heat transfer characteristics of two-phase #ow boiling of alternative zeotropic refrigerant mixtures to R-502, on air/refrigerant horizontal enhanced surface tubing is presented. The new alternatives considered in this study are: R-507, R-404A, R-407B, and R-408A.

It was evident from the experimental data that R-502 has the lowest heat transfer rate compared to the other blends in the range investigated. Furthermore, it was also quite evident from these data that R-407B has the highest pressure among the blends under investigation. However, at a Reynolds number less than 3.6;10, it appears from the data that R-404A has the lowest pressure drop compared to other refrigerants under investigation.