Energy and exergy analysis applied to the evaporative cooling process in air washers / J. C. Santos in International journal of refrigeration, Vol. 36 N° 3 (Mai 2013)  

Public ISBD [article]  inInternational journal of refrigeration > Vol. 36 N° 3 (Mai 2013) . - pp. 1154–1161 Titre : Energy and exergy analysis applied to the evaporative cooling process in air washers Titre original : Analyse énergétique et exergétique appliquée au procédé de refroidissement évaporatif dans les laveurs d'air Type de document : texte imprimé Auteurs : J. C. Santos, Auteur ; G. D. T. Barros, Auteur ; J. M. Gurgel, Auteur Année de publication : 2013 Article en page(s) : pp. 1154–1161 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Evaporative cooling  Air washer  Saturation effectiveness  Second law Résumé : This paper presents a study on the performance of the evaporative cooling process in air washers with the use of mass balances, energy and exergy equations. Usually, the performance of these devices is described in terms of their saturation effectiveness based on energy analysis. This method, however, is inappropriate to identify the main sources of irreversibility within the process. It is also unsuitable to give the optimum conditions for operating the system with a proper use of energy resources. Thus, an exergy analysis was developed to complement the energy analysis of the process. A mathematical model based on mass and energy balances was used to determine the water and air properties in the washer. The influence of the humidity and temperature of the air and water at the inlet, the washer length in the saturation effectiveness, and the second law efficiency was investigated. The results showed that the best condition of the intake air for obtaining thermal comfort does not coincide with the best condition for the thermodynamic performance of the system. The energy and exergy analyses were carried out simultaneously to generate the conditions required for optimum performance with minimal exergy depletion. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700712003556 [article] Energy and exergy analysis applied to the evaporative cooling process in air washers = Analyse énergétique et exergétique appliquée au procédé de refroidissement évaporatif dans les laveurs d'air [texte imprimé] / J. C. Santos, Auteur ; G. D. T. Barros, Auteur ; J. M. Gurgel, Auteur . - 2013 . - pp. 1154–1161. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 3 (Mai 2013) . - pp. 1154–1161 Mots-clés : Evaporative cooling  Air washer  Saturation effectiveness  Second law Résumé : This paper presents a study on the performance of the evaporative cooling process in air washers with the use of mass balances, energy and exergy equations. Usually, the performance of these devices is described in terms of their saturation effectiveness based on energy analysis. This method, however, is inappropriate to identify the main sources of irreversibility within the process. It is also unsuitable to give the optimum conditions for operating the system with a proper use of energy resources. Thus, an exergy analysis was developed to complement the energy analysis of the process. A mathematical model based on mass and energy balances was used to determine the water and air properties in the washer. The influence of the humidity and temperature of the air and water at the inlet, the washer length in the saturation effectiveness, and the second law efficiency was investigated. The results showed that the best condition of the intake air for obtaining thermal comfort does not coincide with the best condition for the thermodynamic performance of the system. The energy and exergy analyses were carried out simultaneously to generate the conditions required for optimum performance with minimal exergy depletion. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700712003556

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