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Analyse thermodynamique et optimisation du cycle de refroidissement hybride bi-étagé au CO2 transcritique par compression mécanique et éjecteur.

Hybrid two–stage СО2 transcritical mechanical compression–ejector cooling cycle: Thermodynamic analysis and optimization.

Auteurs : IERIN V., CHEN G., VOLOVYK O., SHESTOPALOV K.

Type d'article : Article de la RIF

Résumé

In the paper, the main results of thermodynamic analysis and optimization of the hybrid two–stage carbon dioxide (СО2) transcritical mechanical compression–ejector cooling cycle are presented. The proposed hybrid cooling cycle contains a two–stage CO2 transcritical mechanical compression refrigeration machine and an ejector cooling machine using refrigerants R245ca, R601b, and R1233zd(E). The operation of the ejector cooling cycle is ensured by using some part of the heat rejected from the compressed superheated CO2 vapor of the mechanical compression refrigeration cycle. The cold obtained in the ejector cooling machine is used for subcooling the high–pressure CO2 vapor after the gas cooler. In addition, the intermediate cooling of the CO2 vapor after the low–pressure stage of the mechanical compression refrigeration cycle is realized by preheating and boiling the refrigerant of the ejector cooling cycle in the additional generator–precooler before entering the main generator–precooler. This paper presents a method for determination of the optimal design parameters and performance of the proposed hybrid cooling cycle. The results showed an increase in efficiency of the two–stage CO2 transcritical mechanical compression refrigeration machine in the proposed cooling system of up to 32.7% compared to the conventional system at transcritical operating conditions with high an environmental temperature.

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Format PDF

Pages : 45-55

Disponible

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    20 €

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Détails

  • Titre original : Hybrid two–stage СО2 transcritical mechanical compression–ejector cooling cycle: Thermodynamic analysis and optimization.
  • Identifiant de la fiche : 30029211
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 132
  • Date d'édition : 12/2021
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2021.09.012
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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