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Document IIF

Analyse théorique de la performance d'un cycle de compression [bi-étagé] au CO2 avec deux températures d'évaporation différente.

Theoretical analysis of performance of a two-stage compression CO2 cycle with two different evaporating temperatures.

Auteurs : SHIN E., PARK C., CHO H.

Type d'article : Article, Article de la RIF

Résumé

The performance characteristics of a two-stage CO2 system with two different evaporating temperatures have been analyzed through simulation with such variables as outdoor air temperature, outdoor air velocity, and 2nd-stage EEV opening. The simulation of performance of the two-stage compression cycle indicated that the cooling COP decreased by 22.9, 16.1, 18.9, and 19.4%, respectively, for frostless cooling capacities of 0, -10, -20, and -30%, when the outdoor temperature was increased. The system had a maximum cooling COP for the frostless cooling capacity of -10%, or -20% when the 2nd-stage EEV opening was 56%. The maximum cooling COPs for the non-frost and the frostless cooling capacity of -30% were 1.45 and 1.003, respectively, when the 2nd-stage EEV opening was 52%. The system performance was very sensitive to the variation of 2nd-stage EEV opening.

Documents disponibles

Format PDF

Pages : 164-175

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 : Theoretical analysis of performance of a two-stage compression CO2 cycle with two different evaporating temperatures.
  • Identifiant de la fiche : 30012748
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 47
  • Date d'édition : 11/2014

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