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Energy efficiency enhancement of a domestic refrigerator using R436A and R600a as alternative refrigerants to R134a.

Author(s) : RASTI M., AGHAMIRI S. F., HATAMIPOUR M. S.

Type of article: Article

Summary

This paper is devoted to a feasibility study of the substitution of two hydrocarbon refrigerants for R134a in a domestic refrigerator. Experiments are designed on a refrigerator manufactured for 105 g R134a charge. The effect of parameters including refrigerant type, refrigerant charge and compressor type are investigated. This research is conducted using R436A (mixture of 46% iso-butane and 54% propane) and R600a (pure iso-butane) as hydrocarbon refrigerants, an HFC type compressor (designed for R134a) and an HC-type compressor (designed for R600a). The results show that for HFC-type compressor, the optimum refrigerant charges are 60 g and 55 g for R436A and R600a, respectively. Moreover, for this type of compressor, the energy consumption of R436A and R600a at optimal charges is reduced by about 14% and 7%, respectively in comparison wiht R134a. On the other hand, when using HC type compressor, the optimal refrigerant charges for R436A and R600a are both 50 g, and the energy consumption of R436A and R600a at optimal charges are reduced by about 14.6% and 18.7%, respectively. Furthermore, when the refrigerator is equipped with an HC-type compressor, working under optimal charges of R436A and R600a, it has a total equivalent warming impact of about 16% and 21% lower than the base refrigerator, respectively.
Total exergy destruction of the domestic refrigerator with an HFC-type compressor for R134a, R600a and R436A are 0.0389, 0.0301, 0.0471, respectively and for R600a and R436A with HC-type compressor are 0.0292, 0.0472, respectively.

Details

  • Original title: Energy efficiency enhancement of a domestic refrigerator using R436A and R600a as alternative refrigerants to R134a.
  • Record ID : 30008445
  • Languages: English
  • Source: International Journal of thermal Sciences - vol. 74
  • Publication date: 2013/12
  • DOI: http://dx.doi.org/10.1016/j.ijthermalsci.2013.07.009

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