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Document IIF

Étude sur les modifications des performances d'un système de pompe à chaleur fonctionnant avec des mélanges de frigorigènes en cas de fuite.

Investigation on the performance change of a heat pump system with refrigerant mixtures during leakage process.

Numéro : 0426

Auteurs : JEONG Y., LEE S., KIM M. S.

Résumé

In a heat pump system, refrigerant mixtures are presented as promising alternative refrigerants. However, their main drawback is a change in composition during refrigerant leakage. Moreover, in an operating system with zeotropic mixtures, the circulating concentration is different from the originally charged concentration. In this study, the numerical method to estimate circulation concentration is proposed, and the leakage model based on the proposed method is established to properly predict the performance change during the leakage process. As a working fluid, a R32/1234yf zeotropic mixture is chosen. The assumption is that the leakage occurs in single-phase regions such as inlet or outlet of compressor or condenser. The deviation from the original composition during leakage affects the system performance change, even though the change is mainly caused by insufficient charge. From the simulation results, the circulation concentration is estimated as 51.25% for the initial condition, in which R32/1234yf is 50/50 by mass. When the 70% of the initial charge amount leaks out of the system, R32/1234yf has composition of 47.3/52.7 and the coefficient of performance (COP) decreases by 52.9%.

Documents disponibles

Format PDF

Pages : 8

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 : Investigation on the performance change of a heat pump system with refrigerant mixtures during leakage process.
  • Identifiant de la fiche : 30031412
  • Langues : Anglais
  • Sujet : Technologie, Alternatives aux HFC
  • Source : Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
  • Date d'édition : 21/08/2023
  • DOI : http://dx.doi.org/10.18462/iir.icr.2023.0426

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