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Flow boiling and condensation of tetrary refrigerant mixtures inside water/refrigerant enhanced surface tubing
Author(s) -
Sami S. M.,
Song B.
Publication year - 1997
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(199711)21:14<1305::aid-er328>3.0.co;2-q
Subject(s) - refrigerant , thermodynamics , boiling , pressure drop , condensation , heat transfer , chemistry , water chiller , materials science , heat exchanger , physics
This work presents the results of an experimental study concerning the heat transfer characteristics of two‐phase flow condensation and boiling of tetrary (R‐32/R‐125/R143a/R134a) refrigerant mixtures inside water/refrigerant horizontal enhanced surface tubing. Heat transfer characteristics such as average heat transfer coefficients, as well as pressure drops of the tetrary refrigerant mixtures, have been predicted and compared with other mixtures during flow condensation and boiling inside enhanced surface tubing. It was found that the tetrary refrigerant blend has higher transfer coefficients than R‐502, and the lowest pressure drop among the refrigerants studied. © 1997 by John Wiley & Sons, Ltd.