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Evaluation of lower GWP alternative R-473A for R-23 in ultra-low temperature refrigeration applications.

Number: 0106

Author(s) : NAYAK G., PETERSEN M., KUJAK S., KOLDA M., KOHOUTEK T.

Summary

R-23 has been the main refrigerant used in ultra-low temperature refrigeration (ULT) applications, either as a single component or as a blend with R-116 forming R-508A or R-508B. All these options have very high global warming potential but the search for alternatives that can provide similar operating characteristics and performance with a lower GWP has been difficult. R-23 is used in the low temperature stage of the cascade refrigeration cycle of ULT freezer units in intermodal containers that are commonly used for vaccine or tuna storage and transportation. R-473A has been proposed as an option for ULT applications with a GWP of less than 2000.
This paper investigates the experimental evaluation of a ULT container cascade refrigeration system that utilizes R-134a in the high temperature stage and R-23 in the low temperature stage. Different ambient temperatures are evaluated with the baseline system before replacing the low stage refrigerant with the lower GWP option R-473A. Relative performance and operational characteristics will be discussed.

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Pages: 8

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Details

  • Original title: Evaluation of lower GWP alternative R-473A for R-23 in ultra-low temperature refrigeration applications.
  • Record ID : 30031773
  • Languages: English
  • Subject: Technology, HFCs alternatives
  • Source: Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
  • Publication date: 2023/08/21
  • DOI: http://dx.doi.org/10.18462/iir.icr.2023.0106

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