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Numerical simulation of heat and mass transfer in adsorbent beds with annular fins / Hamid Niazmand in International journal of refrigeration, Vol. 35 N° 3 (Mai 2012) 

Public ISBD [article]  in International journal of refrigeration > Vol. 35 N° 3 (Mai 2012) . - pp. 581–593 Titre : Numerical simulation of heat and mass transfer in adsorbent beds with annular fins Titre original : Simulation numérique du transfert de chaleur et de masse dans des lits absorbants munis d'ailettes annulaires Type de document : texte imprimé Auteurs : Hamid Niazmand, Auteur ; Iman Dabzadeh, Auteur Année de publication : 2012 Article en page(s) : pp. 581–593 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Adsorbent  System  Adsorption  Porous  medium  Mass  transfer  Heat  transfer  Desorption Résumé : A transient two-dimensional numerical model of combined heat and mass transfer in the adsorbent bed of a silica gel/water adsorption chiller is presented for a cylindrical bed with annular fins. The bed transient transport behaviors are discussed for all cycle phases. Complex flow patterns are found for isosteric heating and cooling phases due to the simultaneous occurrence of the adsorption and desorption processes. Furthermore, the effects of bed configurations such as fin spacing, bed height, and particle size on the performance of the system are examined. Results show that fins in general reduce the COP of the system; however, for a given total cooling power, the bed size can be reduced dramatically, when fins are employed at the cost of slightly lower COP. It is also shown that there is an optimum particle diameter associated with each bed configuration that maximizes the COP, TCP, and SCP of the system. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711001198 [article] Numerical simulation of heat and mass transfer in adsorbent beds with annular fins = Simulation numérique du transfert de chaleur et de masse dans des lits absorbants munis d'ailettes annulaires [texte imprimé] / Hamid Niazmand, Auteur ; Iman Dabzadeh, Auteur . - 2012 . - pp. 581–593. Génie mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 35 N° 3 (Mai 2012) . - pp. 581–593 Mots-clés : Adsorbent  System  Adsorption  Porous  medium  Mass  transfer  Heat  transfer  Desorption Résumé : A transient two-dimensional numerical model of combined heat and mass transfer in the adsorbent bed of a silica gel/water adsorption chiller is presented for a cylindrical bed with annular fins. The bed transient transport behaviors are discussed for all cycle phases. Complex flow patterns are found for isosteric heating and cooling phases due to the simultaneous occurrence of the adsorption and desorption processes. Furthermore, the effects of bed configurations such as fin spacing, bed height, and particle size on the performance of the system are examined. Results show that fins in general reduce the COP of the system; however, for a given total cooling power, the bed size can be reduced dramatically, when fins are employed at the cost of slightly lower COP. It is also shown that there is an optimum particle diameter associated with each bed configuration that maximizes the COP, TCP, and SCP of the system. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711001198