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Performance characteristics of a small-capacity directly cooled refrigerator using R-290/R-600a (55/45).

Author(s) : LEE M. Y., LEE Q. Y., KIM Y.

Type of article: Article, IJR article

Summary

In this study, the performance of a small-capacity directly cooled refrigerator was evaluated by using the mixture of R-290 and R-600a with mass fraction of 55/45 as an alternative to R-134a. The compressor displacement volume of the alternative system with R-290/R-600a (55/45) was modified from that of the original system with R-134a to match the refrigeration capacity. Both systems with R-290/R-600a (55/45) and R-134a 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 R-290/R-600a system was approximately 50% of that of the optimized R-134a system. The capillary tube lengths for each evaporator in the optimized R-290/R-600a system were 500 mm longer than those in the optimized R-134a system. The power consumption of the optimized R-134a system was 12.3% higher than that of the optimized R-290/R-600a system. The cooling speed of the optimized R-290/R-600a (55/45) system at the in-case setting temperature of -15°C was improved by 28.8% over that of the optimized R-134a system.

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Pages: 734-741

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Details

  • Original title: Performance characteristics of a small-capacity directly cooled refrigerator using R-290/R-600a (55/45).
  • Record ID : 2008-1653
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 31 - n. 4
  • Publication date: 2008/06

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