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Application d'un éjecteur dans un cycle frigorifique à cascade avec comme objectif l'amélioration de la performance.

Application of an ejector in autocascade refrigeration cycle for the performance improvement.

Auteurs : YU J., ZHAO H., LI Y.

Type d'article : Article, Article de la RIF

Résumé

This paper presented a novel auto cascade refrigeration cycle (NARC) with an ejector. In the NARC, the ejector is used to recover some available work to increase the compressor suction pressure. The NARC enables the compressor to operate at lower pressure ratio, which in turn improves the cycle performance. Theoretical computation model based on the constant pressure-mixing model for the ejector is used to perform a thermodynamic cycle analysis for the NARC with the refrigerant mixture of R-23/R-134a. The effects of some main parameters on cycle performance were investigated. The results show the NARC has an outstanding merit in decreasing the pressure ratio of compressor as well as increasing the COP. For NARC operated at the condenser outlet temperature of 40°C, the evaporator inlet temperature of -40.3°C, and the mass fraction of R-23 is 0.15, the pressure ratio of the ejector reaches to 1.35, the pressure ratio of compressor is reduced by 25.8% and the COP is improved by 19.1% over the conventional auto cascade refrigeration cycle.

Documents disponibles

Format PDF

Pages : 279-286

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 : Application of an ejector in autocascade refrigeration cycle for the performance improvement.
  • Identifiant de la fiche : 2008-0573
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 31 - n. 2
  • Date d'édition : 03/2008

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