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Experimental evaluation of R290/R170 in a two-stage cascade ultra-low temperature refrigeration system with Internal Heat Exchanger and comparison with HFC baseline.

Number: 1121

Author(s) : UDROIU C-M., MOTA-BABILONI A., GIMÉNEZ-PRADES P., FORÉS-PALANQUES A., NAVARRO-ESBRÍ J.

Summary

Refrigeration cycles operating below −50 °C are highly inefficient and rely on refrigerants with high global warming potential. This inefficiency is primarily due to limited technological advancements and a lack of comprehensive studies on suitable refrigerants for ultra-low temperatures. To address this gap, this article aims to analyze the experimental behaviour of a cascade compression cycle for ultra-low temperature refrigeration. The refrigerants analysed are R290 in the high-temperature stage and R170 in the low-temperature stage. These refrigerants have been compared with the R404A/R23 pair, which is commonly used in the sector, and the R448A/R170 pair. The results indicate that the R290/R170 pair provides superior performance in terms of the coefficient of performance. A Total Equivalent Warming Impact analysis demonstrates its environmental advantages. It also achieves the best results in compressor volumetric efficiency and discharge temperature.

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Details

  • Original title: Experimental evaluation of R290/R170 in a two-stage cascade ultra-low temperature refrigeration system with Internal Heat Exchanger and comparison with HFC baseline.
  • Record ID : 30034175
  • Languages: English
  • Subject: HFCs alternatives
  • Source: 1st IIR International Conference on Refrigeration Adapting to Rising Temperatures
  • Publication date: 2025/08
  • DOI: http://dx.doi.org/10.18462/iir.adaptation.2024.1121

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