Analyse du transfert de chaleur et de masse autour d'un rectificateur à bobine hélicoïdale dans un système d'absorption à ammoniaque-eau.
Heat and mass transfer analysis of a helical coil rectifier in an ammonia-water absorption system.
Auteurs : FERNÁNDEZ-SEARA J., SIERES J., VÁZQUEZ M.
Type d'article : Article
Résumé
This article presents a detailed study on the ammonia-water vapour rectification process in absorption systems using a helical coil rectifier. A differential mathematical model has been developed on the basis of mass and energy balances and heat and mass transfer equations. The differential volume has been defined in each coil turn by a differential angle on the turn and a second differential angle on the coiled tube cross section. It contains the corresponding differential portion of coolant, coiled tube wall, condensate film and vapour. Simultaneous heat and mass transfer processes have been taken into account in the vapour and liquid phases. The model equations have been solved using the finite-difference method. Results have been obtained for characteristic data from an ammonia-water absorption refrigeration system. Most significant calculated variable profiles along the coil height as well as in the coiled tube cross section are presented and discussed. The influence of the heat and mass transfer coefficients on the rectifier performance has also been considered.
Détails
- Titre original : Heat and mass transfer analysis of a helical coil rectifier in an ammonia-water absorption system.
- Identifiant de la fiche : 2005-0159
- Langues : Anglais
- Source : International Journal of thermal Sciences - vol. 42 - n. 8
- Date d'édition : 08/2003
Liens
Voir d'autres articles du même numéro (2)
Voir la source
Indexation
-
Influence of the refrigerant mass fraction in t...
- Auteurs : TAKESHITA K., AMANO Y., HASHIZUME T., et al.
- Date : 2004
- Langues : Anglais
- Source : JSME int. J., B - vol. 47 - n. 2
Voir la fiche
-
Numerical study of falling-film heat and mass t...
- Auteurs : KWON K., JEONG S.
- Date : 21/05/2006
- Langues : Anglais
- Source : ACRA-2006. Proceedings of the 3rd Asian conference on refrigeration and air conditioning.
Voir la fiche
-
Simultaneous heat and mass transfer of a packed...
- Auteurs : FERNÁNDEZ-SEARA J., SIERES J., VÁSQUEZ M.
- Date : 10/2002
- Langues : Anglais
- Source : International Journal of thermal Sciences - vol. 41 - n. 10
Voir la fiche
-
Desorber and rectifier geometries for ammonia-w...
- Auteurs : DELAHANTY J. C., HUGHES M., GARIMELLA S.
- Date : 02/2021
- Langues : Anglais
- Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 122
- Formats : PDF
Voir la fiche
-
Ammonia-water absorption in vertical tubular ab...
- Auteurs : FERNÁNDEZ-SEARA J., SIERES J., RODRÍGUEZ C., et al.
- Date : 03/2005
- Langues : Anglais
- Source : International Journal of thermal Sciences - vol. 44 - n. 3
Voir la fiche