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Evaluation d'un cycle de pompe à chaleur à compression bi-étagée utilisant le mélange R290/R744 pour la production d'eau chaude.

Assessment of a two-stage compression heat pump cycle using mixture R290/R744 for water heater applications.

Numéro : pap. n. 713

Auteurs : XING M., YU J.

Résumé

In this study, the mixture R290/R744 were chosen as promising alternative refrigerants in a two-stage compressor heat pump cycle and their performance potentials were evaluated by using the developed mathematical model. As the additive amount of R744 in the refrigerant mixture increases from 5% to 15%, the progressive rise in volumetric heating capacity is presented, but the heating COP tends to decrease while the system pressure rises. When the mass concentration of R744 varies from 5% to 15%, the volumetric heating capacity increases by 412.72 KJ m-3 and the heating COP reduces by 0.79 on average under the evaporator outlet temperature varies from -30 to 20 °C. Considering the potential in reducing the irreversibility of heat exchangers, however, the zeotropic refrigerant R290/R744 can yield very attractive advantage in heat pump water heater applications due to its larger gliding temperature features.

Documents disponibles

Format PDF

Pages : 7 p.

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 : Assessment of a two-stage compression heat pump cycle using mixture R290/R744 for water heater applications.
  • Identifiant de la fiche : 30015464
  • Langues : Anglais
  • Source : Proceedings of the 24th IIR International Congress of Refrigeration: Yokohama, Japan, August 16-22, 2015.
  • Date d'édition : 16/08/2015
  • DOI : http://dx.doi.org/10.18462/iir.icr.2015.0713

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