Transfert de chaleur par évaporation des frigorigènes à faible PRP (R-448A, R-449A, R-455A, R-454C) en remplacement du R-404A dans un tube à micro-ailettes

Translated title of the contribution: Evaporation heat transfer of the low GWP alternative refrigerants (R-448A, R-449A, R-455A, R-454C) for R-404A in a microfin tube

Cheol Hwan Kim, Nae Hyun Kim*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The literature survey reveals that the studies on evaporation of an alternative refrigerant for R-404A are lacking. In this study, four R-404A alternative refrigerants - two short term refrigerants (R-448A, R-449A) and two long term refrigerants (R-455A, R-454C) - including R-404A were tested in a 7.0 mm O.D. microfin tube. The tests were conducted changing the mass flux from 90 to 300 kg m−2s−1, heat flux from 5 to 15 kW m−2 and vapor quality from 0.2 to 0.8. During the test, the saturation temperature was maintained at 10 °C. The heat transfer coefficients of R-404A were higher than those of the alternative refrigerants. However, the difference tended to decrease as the mass flux increased. The higher heat transfer coefficient of R-404A may be due to the smaller temperature glide of R-404A as compared with those of other refrigerants. The microfin / smooth tube heat transfer enhancement ratios of the alternative refrigerants ranged from 1.14 to 1.93. With the mixture correction, pure refrigerant correlations successfully predicted the mixture refrigerant data.

Translated title of the contributionEvaporation heat transfer of the low GWP alternative refrigerants (R-448A, R-449A, R-455A, R-454C) for R-404A in a microfin tube
Original languageFrench
Pages (from-to)118-128
Number of pages11
JournalInternational Journal of Refrigeration
Volume128
DOIs
Publication statusPublished - 2021 Aug
Externally publishedYes

Keywords

  • Evaporation heat transfer
  • GWP
  • Microfin tube
  • R-404A
  • R-448A
  • R-449A
  • R-454C
  • R-455A

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering

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