Documents disponibles écrits par cet auteur

Analytical solution for the simultaneous heat and mass transfer problem in air washers / J.C. Santos in International journal of refrigeration, Vol. 34 N° 1 (Janvier 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 1 (Janvier 2011) . - pp. 353-361 Titre : Analytical solution for the simultaneous heat and mass transfer problem in air washers Titre original : Solution analytique du problème de transfert simultané de chaleur et de masse dans un laveur d'air Type de document : texte imprimé Auteurs : J.C. Santos, Auteur ; J.M. Medeiros, Auteur Année de publication : 2011 Article en page(s) : pp. 353-361 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Air  conditioning  Air  washer  Evaporative  system  Calculation  Heat  transfer  Mass  transfer Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : An analytical solution approach for the simultaneous heat and mass transfer problem in air washers operating as evaporative coolers is presented. A one-dimensional model using the coupled mass and energy balance equations in the air washer is presented. Then, starting from a linear approach for the experimental curve of the air saturation, an analytical solution for the model was derived. The solution showed an excellent agreement with the available results found in the literature. The influence of several important parameters for the cooling process such as temperature and ambient air humidity, air flow rate and feeding water temperature, in the air cooling rate was investigated. The efficacy of the process can be greatly increased by reducing the cooling water temperature and the applied air flow rate. The analytical solution can be easily included into the models used for simulating desiccant air-conditioning systems operating in conjunction with air washers. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710001465 [article] Analytical solution for the simultaneous heat and mass transfer problem in air washers = Solution analytique du problème de transfert simultané de chaleur et de masse dans un laveur d'air [texte imprimé] / J.C. Santos, Auteur ; J.M. Medeiros, Auteur . - 2011 . - pp. 353-361. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 1 (Janvier 2011) . - pp. 353-361 Mots-clés : Air  conditioning  Air  washer  Evaporative  system  Calculation  Heat  transfer  Mass  transfer Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : An analytical solution approach for the simultaneous heat and mass transfer problem in air washers operating as evaporative coolers is presented. A one-dimensional model using the coupled mass and energy balance equations in the air washer is presented. Then, starting from a linear approach for the experimental curve of the air saturation, an analytical solution for the model was derived. The solution showed an excellent agreement with the available results found in the literature. The influence of several important parameters for the cooling process such as temperature and ambient air humidity, air flow rate and feeding water temperature, in the air cooling rate was investigated. The efficacy of the process can be greatly increased by reducing the cooling water temperature and the applied air flow rate. The analytical solution can be easily included into the models used for simulating desiccant air-conditioning systems operating in conjunction with air washers. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710001465

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]  in International 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