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Experiment and simulation on the performance of an autocascade refrigeration system using carbon dioxide as a refrigerant.

Etude expérimentale et simulation de la performance d'un système frigorifique à cascade utilisant le dioxyde de carbone comme frigorigène.

Auteurs : KIM S. G., KIM M. S.

Type d'article : Article, Article de la RIF

Résumé

The main purpose of this study is to investigate the performance of an autocascade refrigeration system using zeotropic refrigerant mixtures of R744/134a and R744/290. One of the advantages of this system is the possibility of keeping the highest pressure of the system within a limit by selecting the composition of a refrigerant mixture as compared to that in the vapour compression system using pure carbon dioxide. Performance test and simulation have been carried out for an autocascade refrigeration system by varying secondary fluid temperatures at evaporator and condenser inlets. Variations of mass flow rate of refrigerant, compressor power, refrigeration capacity, and coefficient of performance (COP) with respect to the mass fraction of R744 in R744/134a and R744/290 mixtures are presented at different operating conditions. Experimental results show similar trends with those from the simulation. As the composition of R744 in the refrigerant mixture increases, cooling capacity is enhanced, but COP tends to decrease while the system pressure rises.

Documents disponibles

Format PDF

Pages : 1093-1101

Disponible

  • Prix public

    11 €

  • Prix membre*

    8,50 €

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Experiment and simulation on the performance of an autocascade refrigeration system using carbon dioxide as a refrigerant.
  • Identifiant de la fiche : 2003-1700
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue internationale du Froid - vol. 25 - n. 8
  • Date d'édition : 12/2002

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