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Forced convective boiling of nonazeotropic refrigerant mixtures inside enhanced surface tubing
Author(s) -
Sami S. M.,
Schnotale J.
Publication year - 1992
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/er.4440160706
Subject(s) - refrigerant , thermodynamics , boiling , pressure drop , heat transfer , materials science , boiling heat transfer , chemistry , heat transfer coefficient , nucleate boiling , heat exchanger , physics
Abstract An experimental study on the characteristics of two phase flow boiling of pure refrigerants such as R12 and R22 as well as nonazeotropic refrigerant mixtures R22/R114 and R22/R152 a inside horizontal enhanced surface tubing is presented. The enhanced surface tubing results showed a significant improvement of the heat transfer over that of an equivalent smooth tube, depending on the mixture components and their concentrations. Correlations are proposed to predict the heat transfer characteristics such as average heat transfer coefficients as well as pressure drops of nonazeotropic refrigerant mixture flow boiling inside enhanced surface tubing. In addition, it was found that the refrigerant mixtures pressure drop is a weak function of the mixture compositions.