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Etude thermodynamique comparative des systèmes à sorption : analyse selon le deuxième principe.

A comparative thermodynamic study of sorption systems: second law analysis.

Auteurs : MEUNIER F., KAUSHIK S. C., NEVEU P., POYELLE F.

Type d'article : Article, Article de la RIF

Résumé

As a consequence of the phasing out of CFCs, sorption systems appear to be potential candidates to replace vapour compression systems. Amongst sorption systems there exists a choice between several systems, such as liquid absorption, solid adsorption and chemical reaction heat pumps. Nevertheless, few comparative studies between these systems have been undertaken so far. The paper presents such a study based on combined first and second law thermodynamical analysis of the different cycles. Simple entropy generation processes explain why the basic cycles for these systems yield performances much lower than the Carnot efficiency. The possibility of operating regenerative cycles with internal heat recovery and higher efficiencies is also considered for typical common base conditions. Different entropy generation considerations are visualised, such as thermal coupling (external/internal), non-uniform temperature component entropy production and other irreversible processes for the COP degradation in these systems. It is found that thermal coupling irreversibilities in solid sorption systems and other internal irreversibilities in liquid sorption systems with solution heat exchanger are dominant in the actual COP degradation with respect to the reversible Carnot COP.

Documents disponibles

Format PDF

Pages : 414-421

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 : A comparative thermodynamic study of sorption systems: second law analysis.
  • Identifiant de la fiche : 1998-0870
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 19 - n. 6
  • Date d'édition : 07/1996

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