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Etude numérique sur un cycle frigorifique à absorption à diffusion.

Numerical investigation of a diffusion absorption refrigeration cycle.

Auteurs : ZOHAR A., JELINEK M., LEVY A., et al.

Type d'article : Article, Article de la RIF

Résumé

A thermodynamic model was developed for an ammonia-water diffusion absorption refrigeration (DAR) cycle with hydrogen or helium as the auxiliary inert gas, manufactured by Electrolux Sweden (currently known as Dometic). The performance of the system was examined parametrically by computer simulation. Mass and energy conservation equations were developed for each component of the cycle and solved numerically. The model was validated by comparison with previously published experimental data for DAR systems. Investigation of cycle performance under different conditions indicated that the best performance was obtained for a concentration range of the rich solution of 0.2-0.3 ammonia mass fraction and that the recommended concentration of the weak solution was 0.1. It was also found that as the degree of rectification decreased, the performance of the DAR cycle decreased. Finally, the study showed that helium was superior to hydrogen as the inert gas: the coefficient of performance of a DAR unit working with helium was higher by up to 40% than a cycle working with hydrogen.

Documents disponibles

Format PDF

Pages : 515-525

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 : Numerical investigation of a diffusion absorption refrigeration cycle.
  • Identifiant de la fiche : 2005-1834
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 28 - n. 4
  • Date d'édition : 06/2005

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