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Theoretical analysis of the thermal performance of R600a, R290 and their mixtures in a retrofit R134a refrigeration system.

Number: 0611

Author(s) : RAMATHE T., HUAN Z.

Summary

In this research, a theoretical analysis was developed to evaluate the feasibility of the R134a retrofit by hydrocarbons R600a, R290 and their various mixture compositions of R600a/R290 in a vapour compression refrigeration system. The evaporation and condensation temperatures were ranging from -25 to 3°C and 25 to 65°C, respectively. Superheating and sub-cooling degrees were kept constant at 5°C. The thermodynamic and thermo-physical properties were obtained using REFPROP 9.1. The effect of evaporation and condensation temperatures on refrigeration performance indexes such as the refrigeration effect, work input, coefficient of performance, discharge temperature, mass flow rate and volume flow rate were studied. Results show that both pure R600a and R290 cannot be recommended as drop-in substitutes for R134a due to their significant differences in thermal performance. A mixture of R600a/R290 50%/50% composition was found to be the most appropriate alternative considering comparative thermal performance and practical aspects.

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Pages: 8 p.

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Details

  • Original title: Theoretical analysis of the thermal performance of R600a, R290 and their mixtures in a retrofit R134a refrigeration system.
  • Record ID : 30033389
  • Languages: English
  • Subject: Technology
  • Source: 11th IIR Conference on Compressors and Refrigerants.
  • Publication date: 2024/09
  • DOI: http://dx.doi.org/10.18462/iir.compr.2024.0611

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