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Comparaison de la performance des cycles frigorifiques biétagés et en cascade utilisant des frigorigènes naturels.

Performance comparison of cascade and two-stage refrigeration cycles using natural refrigerants.

Auteurs : OUADHA A., HADDAD C., EN-NACER M., et al.

Résumé

This paper aims to compare performances of cascade refrigeration systems with two-stage refrigeration systems using exergy method. The considered systems use natural refrigerants, namely carbon dioxide (R-744), ammonia (R-717) and propane (R-290). R-744 is used in the low stage and R-717 or R-290 in the high stage, while the two-stage system uses only R-717 or R-290. Comparison results show that for a given refrigeration capacity, evaporator and condenser temperature and cascade-condenser temperature, the compressor of R744 in the cascade cycle is more compact than those of R-290 and R-717 in the two-stage cycles. While cascade system provides lower exergy efficiency for both the two blends of refrigerants R-744/R-290 and R-744/R-717.

Documents disponibles

Format PDF

Pages : ICR07-B1-118

Disponible

  • Prix public

    20 €

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    Gratuit

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Détails

  • Titre original : Performance comparison of cascade and two-stage refrigeration cycles using natural refrigerants.
  • Identifiant de la fiche : 2007-2546
  • Langues : Anglais
  • Source : ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Date d'édition : 21/08/2007

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