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Performance d'un cycle frigorifique à absorption à diffusion utilisant des fluides actifs organiques.

Performance of diffusion absorption refrigeration cycle with organic working fluids.

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

Type d'article : Article, Article de la RIF

Résumé

A diffusion absorption refrigeration (DAR) cycle is driven by heat and utilizes a binary solution of refrigerant and absorbent as working fluid, together with an auxiliary inert gas. Commercial DAR systems operate with ammonia-water solution and hydrogen or helium as the inert gas. In this work, the performance of a simplified DAR system working with an organic absorbent (DMAC - dimethylacetamide) and five different refrigerants and helium as inert gas was examined numerically, with the aim of lowering the generator temperature and system pressure along with a non-toxic refrigerant The refrigerants were: chlorodifluoromethane (R22), difluoromethane (R32), 2-chloro-1,1,1,2-tetrafluoroethane (R124), pentafluoroethane (R125) and 1,1,1,2-tetrafluoroethane (R134a). The results were compared with the performance of the same system working with ammonia-water and helium. Similar behaviour was found for all systems, regarding the COP and rich and poor solution concentrations as functions of generator temperature. It was found that typical generator temperature with the new substances was 150°C, yet lower COPs, higher evaporator temperatures and lower condensation temperature of about 40°C governed these systems.

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Format PDF

Pages : pp. 1241-1246

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  • 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 : Performance of diffusion absorption refrigeration cycle with organic working fluids.
  • Identifiant de la fiche : 2009-2026
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 32 - n. 6
  • Date d'édition : 09/2009

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