Partager

Efficacités des cycles au CO2 sous-critiques et transcritiques inverses avec et sans échangeur de chaleur interne.

Efficiencies of subcritical and transcritical CO2 inverse cycles with and without an internal heat exchanger.

Auteurs : ZHANG F. Z., JIANG P. X., LIN Y. S., et al.

Type d'article : Article

Résumé

An internal heat exchanger (IHX) is often used to improve the coefficient of performance (COP) of CO2 inverse cycles. This paper presents a detailed analysis of the IHX’s effect in CO2 inverse cycles and finds suitable operating conditions for the IHX from a thermodynamic performance point of view. The results indicate that the COP is slightly reduced by an IHX in a CO2 subcritical inverse cycle, so an IHX is not justified. However, for transcritical CO2 inverse cycles, the compressor discharge pressures and CO2 gas cooler outlet temperatures both have significant impacts on system performance. The analysis results for transcritical CO2 inverse cycles show that a transition discharge pressure and a transition CO2 gas cooler outlet temperature are objective existence above which the IHX improves the cycle performance. [Reprinted with permission of Elsevier. Copyright 2011.]

Détails

  • Titre original : Efficiencies of subcritical and transcritical CO2 inverse cycles with and without an internal heat exchanger.
  • Identifiant de la fiche : 30003589
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 31 - n. 4
  • Date d'édition : 03/2011
  • DOI : http://dx.doi.org/10.1016/j.applthermaleng.2010.09.018

Liens


Voir d'autres articles du même numéro (6)
Voir la source

Indexation