Partager

Document IIF

Étude expérimentale d'un cycle d'éjection diphasique adapté pour une utilisation des frigorigènes à basse pression R134a et R1234yf.

Experimental investigation of a two-phase ejector cycle suitable for use with low-pressure refrigerants R134a and R1234yf.

Auteurs : LAWRENCE N., ELBEL S.

Type d'article : Article, Article de la RIF

Résumé

This paper presents the results of an experimental investigation in which the performance of the low-pressure fluids R134a and R1234yf was compared between a two-phase ejector cycle and expansion valve cycles. An alternate two-phase ejector cycle, in which the pressure lift provided by the ejector was utilized in order to provide multiple evaporation temperatures, was constructed and tested. The experimental results show that ejectors designed for low-pressure fluids were able to achieve similar but lower work recovery efficiencies compared to CO2 ejectors. When compared to a two evaporation temperature expansion valve cycle, the ejector cycle showed maximum COP improvements of 12% with R1234yf and 8% with R134a. When compared to a single evaporation temperature expansion valve cycle, the ejector cycle showed maximum COP improvements of 6% with R1234yf and 5% with R134a. The effect of evaporator design on ejector cycle COP improvement was also demonstrated experimentally.

Documents disponibles

Format PDF

Pages : 310-322

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 : Experimental investigation of a two-phase ejector cycle suitable for use with low-pressure refrigerants R134a and R1234yf.
  • Identifiant de la fiche : 30010375
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 38
  • Date d'édition : 02/2014

Liens


Voir d'autres articles du même numéro (34)
Voir la source

Indexation