Performance characteristics of a small-capacity directly cooled refrigerator using R290/R600a (55/45)

Moo Yeon Lee, Dong Yeon Lee, Yongchan Kim

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

In this study, the performance of a small-capacity directly cooled refrigerator was evaluated by using the mixture of R290 and R600a with mass fraction of 55:45 as an alternative to R134a. The compressor displacement volume of the alternative system with R290/R600a (55/45) was modified from that of the original system with R134a to match the refrigeration capacity. Both systems with R290/R600a (55/45) and R134a were tested, and then optimized by varying the refrigerant charge and capillary tube length under experimental conditions for both the pull-down test and the power consumption test. The refrigerant charge of the optimized R290/R600a system was approximately 50% of that of the optimized R134a system. The capillary tube lengths for each evaporator in the optimized R290/R600a system were 500 mm longer than those in the optimized R134a system. The power consumption of the optimized R134a system was 12.3% higher than that of the optimized R290/R600a system. The cooling speed of the optimized R290/R600a (55/45) system at the in-case setting temperature of -15 °C was improved by 28.8% over that of the optimized R134a system.

Original languageEnglish
Pages (from-to)734-741
Number of pages8
JournalInternational Journal of Refrigeration
Volume31
Issue number4
DOIs
Publication statusPublished - 2008 Jun

Keywords

  • Binary mixture
  • Comparaison
  • Comparison
  • Domestic refrigerator
  • Experiment
  • Expérimentation
  • Isobutane
  • Mélange binaire
  • Performance
  • Propane
  • R134a
  • Réfrigérateur domestique

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering

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