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Étude numérique du transfert de chaleur et de masse lors des processus d’absorption utilisant un film liquide horizontal noyé dans des mélanges ammoniac-eau.

Numerical study of heat and mass transfer absorption processes using a horizontal flooded-liquid film in ammonia-water mixtures.

Numéro : pap. n. 1269

Auteurs : NARVÁEZ-ROMO B., SIMÕES-MOREIRA J. R.

Résumé

This paper presents a numerical study of the heat and mass transfer (HMT) absorption process using ammonia-water solution in a new configuration of horizontal flooded-liquid film, in which the total surface wettability is reached. The absorber is composed of several plates placed in the vertical position. Each one of these plates have a spiral cooling tube, in which the coolant flows and the liquid solution flows over and around the tube. The plate depth guarantees a one-millimeter liquid film of the ammonia-water solution. A mathematical model based on the overall balance of mass, ammonia species, and energy equations was carried out. These equations were solved for a set of control volumes discretized by the finite difference method, and with the HMT correlations. A parametric study of the absorption process was performed: surface temperature, plates number, and liquid film thickness.

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Pages : 8

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Détails

  • Titre original : Numerical study of heat and mass transfer absorption processes using a horizontal flooded-liquid film in ammonia-water mixtures.
  • Identifiant de la fiche : 30026089
  • Langues : Anglais
  • Source : Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Date d'édition : 24/08/2019
  • DOI : http://dx.doi.org/10.18462/iir.icr.2019.1269

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