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Comparaison des performances d’une pompe à chaleur intérieure avec des frigorigènes alternatifs à faible PRP, en particulier le R-455A et le R-454C.

Performance comparison of an indoor unit of a heat pump with low-GWP alternative refrigerants focusing on R455A and R454C.

Numéro : 1129

Auteurs : VASU A., CHANG Y. S.

Résumé

The phase-out of high-impact refrigerants drives the adoption of low-GWP alternatives, with zeotropic mixtures emerging as promising candidates. However, their adoption introduces new challenges in adapting existing heat pump systems to maintain performance. This study evaluates the thermal performance of nearazeotropic R410A, and low-GWP zeotropic blends R454C, and R455A in a 4-kW indoor heat pump unit using a validated finned-tube heat exchanger simulation for cooling and heating modes. The results show that R455A and R454C exhibit significantly lower HTCs compared to R410A—61.4% and 49.5% in cooling mode, and 84.6% and 64.2% in heating mode, respectively—due to thermophysical property differences, reduced mass flux, and large glide temperature differences (GTD), which cause a cross-parallel flow effect. To mitigate performance losses, circuitry optimization is highlighted as essential. This study emphasizes the need for careful system adaptation to ensure effective integration of low-GWP refrigerants in heat pump applications. 

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Format PDF

Pages : 9 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 : Performance comparison of an indoor unit of a heat pump with low-GWP alternative refrigerants focusing on R455A and R454C.
  • Identifiant de la fiche : 30034178
  • Langues : Anglais
  • Sujet : Alternatives aux HFC
  • Source : 1st IIR International Conference on Refrigeration Adapting to Rising Temperatures
  • Date d'édition : 08/2025
  • DOI : http://dx.doi.org/10.18462/iir.adaptation.2024.1129

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