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Extending the range and performance of R-744.

Number: 1042

Author(s) : LOW R.

Summary

R-744 is finding increasing favour as a non-flammable refrigerant in a range of cold-chain refrigeration and other applications. Its physical properties however constrain its application: its triple point of -57°C sets a lower practical operating limit, while the very high operating pressures and reduced energy efficiency in high ambient climates limit its attraction for air-conditioning applications. Koura Global has in development a range of hybrid R-744-fluorocarbon refrigerants which are non-flammable but which offer significantly improved energy efficiency, reduced operating pressure and extended operational temperature range compared to R-744, whilst also having low Global Warming Potentials. The paper will present a suitable thermodynamic model for these fluids and share property and performance test data on several selected applications: heat pumping; air-conditioning; and refrigeration to achieve refrigerated chamber temperatures below -70°C.

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Pages: 9

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Details

  • Original title: Extending the range and performance of R-744.
  • Record ID : 30028810
  • Languages: English
  • Subject: Technology
  • Source: 2nd IIR Conference on HFO Refrigerants and Low GWP Blends
  • Publication date: 2021/06
  • DOI: http://dx.doi.org/10.18462/iir.HFO.2021.1042
  • Document available for consultation in the library of the IIR headquarters only.

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