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Boiling characteristics of alternatives to R‐502 inside air/refrigerant enhanced surface tubing
Author(s) -
Sami Samuel M.,
Desjardins Daniel E.
Publication year - 2000
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/(sici)1099-114x(200001)24:1<27::aid-er564>3.0.co;2-o
Subject(s) - refrigerant , zeotropic mixture , thermodynamics , pressure drop , boiling , reynolds number , heat transfer , chemistry , boiling heat transfer , mechanics , materials science , heat transfer coefficient , nucleate boiling , heat exchanger , physics , turbulence
In this paper, an experimental study on the heat transfer characteristics of two‐phase flow 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 4 , it appears from the data that R‐404A has the lowest pressure drop compared to other refrigerants under investigation. Copyright © 2000 John Wiley & Sons, Ltd.