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Évaluation des mélanges de frigorigènes binaires et ternaires comme substituts au R134a dans un système de conditionnement d'air.

Evaluation of binary and ternary refrigerant blends as replacements for R134a in an air-conditioning system.

Numéro : pap. 2110

Auteurs : BELL I., DOMANSKI P., LINTERIS G. T., et al.

Résumé

We investigated refrigerant blends as possible low-GWP (global warming potential) alternatives for R134a in an airconditioning
application. We carried out an extensive screening of the binary and ternary 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 R134a baseline system. While no mixture was ideal in all regards, we identified 14 “best” blends that were nonflammable (based on a new estimation method by Linteris, et al., presented in a companion paper at this conference) and with COP and capacity similar to the R134a baseline; the tradeoff, however, was a reduction in GWP of, at most, 51% compared to R134a. An additional eight 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 22 “best” blends were then simulated in a more detailed cycle model.

Documents disponibles

Format PDF

Pages : 12

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

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

Détails

  • Titre original : Evaluation of binary and ternary refrigerant blends as replacements for R134a in an air-conditioning system.
  • Identifiant de la fiche : 30024402
  • Langues : Anglais
  • Sujet : Alternatives aux HFC
  • Source : 2018 Purdue Conferences. 17th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 09/07/2018

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