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Transfert de chaleur et de masse pendant l'absorption de la vapeur d'ammoniac par les gouttelettes d'une solution de LiNO3-NH3.

Heat and mass transfer during absorption of ammonia vapour by LiNO3-NH3 solution droplets.

Auteurs : VENEGAS M., IZQUIERDO M., RODRÍGUES P., et al.

Type d'article : Article

Résumé

In this article, the simultaneous mass and heat transfer processes taking place during the absorption of ammonia vapour by lithium nitrate-ammonia solution droplets was numerically simulated. The low-pressure and high-pressure absorbers of a double-stage absorption system were considered. The results obtained were compared with the Newman model for mass transfer. Simulation shows that droplets analysed, with diameters equal to 60 and 100 µm, follow the Newman model for mass transfer. Droplets achieve the equilibrium state in an approximate dimensionless time equal to 0.5, that corresponds to times lower than 1 s. The effect of subcooling on absorption was evaluated. The results obtained are important for the design of spray absorbers of absorption refrigeration systems.

Détails

  • Titre original : Heat and mass transfer during absorption of ammonia vapour by LiNO3-NH3 solution droplets.
  • Identifiant de la fiche : 2004-2227
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 47 - n. 12-13
  • Date d'édition : 06/2004

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