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À la recherche de mélanges de frigorigènes non-inflammables pour remplacer le R-134a.

The hunt for nonflammable refrigerant blends to replace R-134a.

Auteurs : BELL I. H., DOMANSKI P. A., MCLINDEN M. O., et al.

Type d'article : Article, Article de la RIF

Résumé

We investigated refrigerant blends as possible low GWP (global warming potential) alternatives for R- 134a in an air-conditioning application. We carried out an extensive screening of the binary, ternary, and four-component blends possible among a list of 13 pure refrigerants comprising four hydrofluoroolefins (HFOs), eight hydrofluorocarbons (HFCs), and carbon dioxide. The screening was based on a simplified cycle model, but with the inclusion of pressure drops in the evaporator and condenser. The metrics for the evaluation were nonflammability, low GWP, high COP (coefficient of performance), and a volumetric capacity similar to the R-134a baseline system. While no mixture was ideal in all regards, we identified 16 binary and ternary blends that were nonflammable (based on a new estimation method) and with COP and capacity similar to the R-134a baseline; the tradeoff, however, was a reduction in GWP of, at most, 54% compared to R-134a. An additional seven blends that were estimated to be “marginally flammable”(ASHRAE Standard 34 classification of A2L) were identified with GWP reductions of as much as 99%. These 23 “best”blends were then simulated in a more detailed cycle model.

Documents disponibles

Format PDF

Pages : 484-495

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : The hunt for nonflammable refrigerant blends to replace R-134a.
  • Identifiant de la fiche : 30026636
  • Langues : Anglais
  • Sujet : Alternatives aux HFC
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 104
  • Date d'édition : 08/2019
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2019.05.035

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