A Correlation for Forced Convective Boiling Heat Transfer of Nonazeotropic Refrigerant Mixtures of HCFC22/CFC114 in a Horizontal Smooth Tube

Hiroshi Takamatsu, Satoru Momoki, Tetsu Fujii

Research output: Contribution to journalArticle

Abstract

An experimental study is reported on convective boiling heat transfer for nonazeotropic refrigerant mixtures of HCFC22/CFC114 inside a horizontal smooth tube. The test evaporator is of the double-tube type in which the heating water flows in the outer annulus, and the local heat transfer coefficients are measured for both counter and parallel flow. Based on the equation, which correlates the heat transfer coefficient for pure refrigerants as the sum of forced convective contribution aCv and nucleate boiling contribution anb, an empirical correlation equation for the mixture is developed with the data corresponding to the annular flow pattern. The mean deviation between the calculated and measured heat transfer coefficients is 8.9% for the present experimental data and 7.1% for data obtained by Jung. The equation reveals that the contribution of the nucleate boiling to the total heat flux is much smaller than that in pure refrigerants, while the convective heat transfer coefficient is almost the same.

Original languageEnglish
Pages (from-to)2198-2205
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume58
Issue number551
DOIs
Publication statusPublished - Jan 1 1992

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refrigerants
Refrigerants
heat transfer coefficients
boiling
Boiling liquids
Heat transfer coefficients
heat transfer
tubes
Heat transfer
nucleate boiling
Nucleate boiling
annular flow
parallel flow
Parallel flow
evaporators
counterflow
convective heat transfer
water flow
annuli
Evaporators

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

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title = "A Correlation for Forced Convective Boiling Heat Transfer of Nonazeotropic Refrigerant Mixtures of HCFC22/CFC114 in a Horizontal Smooth Tube",
abstract = "An experimental study is reported on convective boiling heat transfer for nonazeotropic refrigerant mixtures of HCFC22/CFC114 inside a horizontal smooth tube. The test evaporator is of the double-tube type in which the heating water flows in the outer annulus, and the local heat transfer coefficients are measured for both counter and parallel flow. Based on the equation, which correlates the heat transfer coefficient for pure refrigerants as the sum of forced convective contribution aCv and nucleate boiling contribution anb, an empirical correlation equation for the mixture is developed with the data corresponding to the annular flow pattern. The mean deviation between the calculated and measured heat transfer coefficients is 8.9{\%} for the present experimental data and 7.1{\%} for data obtained by Jung. The equation reveals that the contribution of the nucleate boiling to the total heat flux is much smaller than that in pure refrigerants, while the convective heat transfer coefficient is almost the same.",
author = "Hiroshi Takamatsu and Satoru Momoki and Tetsu Fujii",
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AU - Fujii, Tetsu

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