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Pushing the envelope: extending the range and performance of R744.

Repousser les limites : étendre la portée et les performances du R744.

Numéro : 1218

Auteurs : LOW R.


Refrigerant R-744 is finding increasing favour as a non-flammable refrigerant in a range of cold-chain refrigeration and other applications. Its 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 two selected applications: air-conditioning with fluids having GWP below 300; and refrigeration to achieve product temperatures below -60°C.

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Pages : 8


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  • Titre original : Pushing the envelope: extending the range and performance of R744.
  • Identifiant de la fiche : 30027764
  • Langues : Anglais
  • Source : IIR Rankine Conference 2020.
  • Date d'édition : 31/07/2020
  • DOI : http://dx.doi.org/10.18462/iir.rankine.2020.1218


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