Partager

Document IIF

Remplacement du R404A par du R449A comme alternative à plus faible GWP dans un système de froid indirect de supermarché.

Retrofit of lower GWP alternative R449A into an existing R404A indirect supermarket refrigeration system.

Auteurs : MAKHNATCH P., MOTA BABILONI A., ROGSTAM J., et al.

Type d'article : Article, Article de la RIF

Résumé

R404A is going to be phased out from most of the commercial refrigeration systems due to its high GWP value of 3943. R449A (GWP of 1282) has been proposed to replace R404A with only minor system modifications in supermarkets. This paper presents the measurements of a light retrofit replacement of R404A using R449A in a medium temperature indirect refrigeration system (secondary fluid temperature at the evaporator outlet between -9 and -4 °C). It has been demonstrated that with a slight expansion device adjustment and 4% increase of refrigerant charge, R449A can be used in this refrigeration system designed for R404A because of its suitable thermodynamic properties and acceptable maximum discharge temperature. At a secondary fluid temperature at condenser inlet of 30 °C, the COP of R449A nearly matches that of R404A (both were between 1.9 and 2.2), despite having approximately 13% lower cooling capacity. As a conclusion, attending to the GWP reduction and similar energy performance,
it was demonstrated using the TEWI methodology that the use of the recently developed refrigerant R449A in these applications can reduce the total CO2 equivalent emissions of an indirect supermarket refrigeration system designed for R404A refrigerant.

Documents disponibles

Format PDF

Pages : 184-192

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 : Retrofit of lower GWP alternative R449A into an existing R404A indirect supermarket refrigeration system.
  • Identifiant de la fiche : 30021223
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 76
  • Date d'édition : 04/2017
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2017.02.009

Liens


Voir d'autres articles du même numéro (33)
Voir la source

Indexation