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Méthodologie pour la conception thermique de systèmes de cogénération (production de froid et d'énergie) utilisant des fluides binaires.

Methodology for thermal design of novel combined refrigeration/power binary fluid systems.

Auteurs : ZHANG N., LIOR N.

Type d'article : Article, Article de la RIF

Résumé

Refrigeration cogeneration systems which generate power alongside with cooling improve energy utilization significantly, because such systems offer a more reasonable arrangement of energy and exergy "flows" within the system, which results in lower fuel consumption as compared to the separate generation of power and cooling or heating. This paper proposes several novel systems of that type, based on ammonia-water working fluid. Importantly, general principles for integration of refrigeration and power systems to produce better energy and exergy efficiencies are summarized, based primarily on the reduction of exergy destruction. The proposed plants analyzed here operate in a fully-integrated combined cycle mode with ammonia-water Rankine cycle(s) and an ammonia refrigeration cycle, interconnected by absorption, separation and heat transfer processes. It was found that the cogeneration systems have good performance, with energy and exergy efficiencies of 28 and 55-60%, respectively, for the base-case studied (at maximum heat input temperature of 450°C). That efficiency is, by itself, excellent for cogeneration cycles using heat sources at these temperatures, with the exergy efficiency comparable to that of nuclear power plants. When using exhaust heat from topping gas turbine power plants, the total plant energy efficiency can rise to the remarkable value of about 57%. The hardware proposed for use is conventional and commercially available; no hardware additional to that needed in conventional power and absorption cycles is needed.

Documents disponibles

Format PDF

Pages : 1072-1085

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 : Methodology for thermal design of novel combined refrigeration/power binary fluid systems.
  • Identifiant de la fiche : 2007-2849
  • Langues : Anglais
  • Sujet : Généralités
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 30 - n. 6
  • Date d'édition : 09/2007

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