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Remplacement immédiat du R134 par des fluides frigorigènes HFO dans un cycle frigorifique à éjecteur.

Drop-in replacement in a R134 ejector refrigeration cycle by HFO refrigerants.

Auteurs : FANG Y., CROQUER S., PONCET S., et al.

Type d'article : Article, Article de la RIF

Résumé

The present work reports a numerical analysis of a single-phase supersonic ejector working with R134a as well as hydrofluoroolefin (HFO) refrigerants R1234yf and R1234ze(E). Comparisons were made regarding the ejector performances under varying operating conditions and refrigerant mixture proportions. The calculations have been then extended to an existing ejector heat driven refrigeration cycle (EHDRC). R1234yf appears to be a good candidate for drop-in replacement of R134a in a real EHDRC, while using R1234ze(E) would induce some modifications due to its thermodynamic properties. Maintaining the same pressure ratio for the ejector would lead on one hand to better entrainment ratio using R1234ze(E) and on the other hand to reduced coefficient of performance (COP) and cooling power by 4.2% and 26.6% in average, respectively. Using R1234yf under the same conditions induces a decrease of 5.2% for the entrainment ratio, 9.6% for the COP and 19.8% for the cooling power in average.

Documents disponibles

Format PDF

Pages : 87-98

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 : Drop-in replacement in a R134 ejector refrigeration cycle by HFO refrigerants.
  • Identifiant de la fiche : 30022262
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 77
  • Date d'édition : 05/2017
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2017.02.028

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