Influence of the atmospheric pressure on the mass transfer rate of desiccant wheels / C.R. Ruivo in International journal of refrigeration, Vol. 34 N° 3 (Mai 2011)  

Public ISBD [article]  inInternational journal of refrigeration > Vol. 34 N° 3 (Mai 2011) . - pp. 707-718 Titre : Influence of the atmospheric pressure on the mass transfer rate of desiccant wheels Titre original : Influence de la pression atmosphérique sur la vitesse de transfert de masse des roues déshydratantes Type de document : texte imprimé Auteurs : C.R. Ruivo, Auteur ; J.J. Costa, Auteur ; A.R. Figueiredo, Auteur Année de publication : 2011 Article en page(s) : pp. 707-718 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Adsorption Desiccant wheel Modelling Steady state Pressure Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The performance of a desiccant wheel is evaluated by modelling a representative channel. The hypothesis of negligible resistances to heat and mass transfer in the cross-direction is assumed in the thin porous desiccant wall of the channels and the airflow is treated as a bulk flow. Parametric studies were conducted to investigate the influence of the atmospheric pressure decrease from 101,325 Pa to 60,000 Pa (0–4217 m of altitude) on the mass transfer rate of desiccant wheels considering distinct channel lengths and different inlet airflow rates, a large range of values of the rotation speed, as well as three alternative ways to specify the inlet conditions of the regeneration and of the process airflows. A procedure to derive correlations based on the numerical results is presented for the correction factor of the mass transfer rate when a desiccant wheel is operating at non-standard atmospheric conditions. Four parametric studies were performed, the derived correlations were tested and a good agreement was found between the estimated correction factor and the correction factor calculated after the numerical results. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710002744 [article] Influence of the atmospheric pressure on the mass transfer rate of desiccant wheels = Influence de la pression atmosphérique sur la vitesse de transfert de masse des roues déshydratantes [texte imprimé] / C.R. Ruivo, Auteur ; J.J. Costa, Auteur ; A.R. Figueiredo, Auteur . - 2011 . - pp. 707-718. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 3 (Mai 2011) . - pp. 707-718 Mots-clés : Adsorption Desiccant wheel Modelling Steady state Pressure Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The performance of a desiccant wheel is evaluated by modelling a representative channel. The hypothesis of negligible resistances to heat and mass transfer in the cross-direction is assumed in the thin porous desiccant wall of the channels and the airflow is treated as a bulk flow. Parametric studies were conducted to investigate the influence of the atmospheric pressure decrease from 101,325 Pa to 60,000 Pa (0–4217 m of altitude) on the mass transfer rate of desiccant wheels considering distinct channel lengths and different inlet airflow rates, a large range of values of the rotation speed, as well as three alternative ways to specify the inlet conditions of the regeneration and of the process airflows. A procedure to derive correlations based on the numerical results is presented for the correction factor of the mass transfer rate when a desiccant wheel is operating at non-standard atmospheric conditions. Four parametric studies were performed, the derived correlations were tested and a good agreement was found between the estimated correction factor and the correction factor calculated after the numerical results. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710002744

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