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Optimisation de l'exergie dans des cycles frigorifiques en cascade et vérification numérique de l'optimisation dans un système au CO2-C3H8.

Exergy maximization of cascade refrigeration cycles and its numerical verification for a transcritical CO2-C3H8 system.

Auteurs : BHATTACHARYYA S., BOSE S., SARKAR J.

Type d'article : Article, Article de la RIF

Résumé

Analysis of an endoreversible two-stage cascade cycle has been implemented and optimum intermediate temperature for maximum exergy and refrigeration effect have been obtained analytically. Further, the heat reservoir temperatures has been optimised independently. A comprehensive numerical model of a transcritical CO2-C3H8 cascade system was developed with intent to verify the theoretical results. It is seen that the simulation results agree well for the optimal low-temperature reservoir but deviate modestly from the theoretical optimum of the high-temperature reservoir (TH). It has also been observed that system performance improves as TH increases and unlike theoretical predictions, no optimal TH is present within feasible working temperatures.

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Format PDF

Pages : 624-632

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    20 €

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Détails

  • Titre original : Exergy maximization of cascade refrigeration cycles and its numerical verification for a transcritical CO2-C3H8 system.
  • Identifiant de la fiche : 2007-0971
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 30 - n. 4
  • Date d'édition : 06/2007

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