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Experimental evaluation of R472B as R23 alternative for ultra-low temperature refrigeration.

Number: 1156

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

Summary

This work experimentally assesses R472B as a lower-GWP alternative to R23 in a two-stage cascade ultra-low temperature refrigeration system. First, the pull-down performance from 15, 20 and 25 °C down to –70 °C is analysed. Then, the hysteresis operation with set freezer temperatures of –70, –60, and –50 °C is studied. The pull-down time was higher for R472B compared to R23, with a time difference from 23 to 40 minutes. Regarding the hysteresis operation, the lowest energy consumption for all the tested conditions was achieved by R472B, being 8.4 to 17.5% lower than R23. The cooling capacity of R472B was 9.4 to 26% lower at –70 and –60 °C, and up to 13% higher at –50 °C. COP was comparable at –70 and –60 °C, and at –50 °C, R472B COP was up to 15.6% higher. The environmental analysis of the hysteresis operation shows that equivalent CO2 emissions can be reduced by 65% when using R472B instead of R23.

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Pages: 9 p.

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Details

  • Original title: Experimental evaluation of R472B as R23 alternative for ultra-low temperature refrigeration.
  • Record ID : 30034191
  • Languages: English
  • Subject: Technology
  • Source: 1st IIR International Conference on Refrigeration Adapting to Rising Temperatures
  • Publication date: 2025/08
  • DOI: http://dx.doi.org/10.18462/iir.adaptation.2024.1156

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