Documents disponibles écrits par cet auteur

Influence of two internal irreversibilities on the new thermo-ecological criterion for three-heat-source refrigerators / Brigitte Astrid Medjo Nouadje in International journal of refrigeration, Vol. 38 (Février 2014) 

Public ISBD [article]  in International journal of refrigeration > Vol. 38 (Février 2014) . - pp. 118–127 Titre : Influence of two internal irreversibilities on the new thermo-ecological criterion for three-heat-source refrigerators Titre original : Influence de deux irréversibilités internes sur les nouveaux critères thermo-écologiques des réfrigérateurs à triple source de chaleur Type de document : texte imprimé Auteurs : Brigitte Astrid Medjo Nouadje, Auteur ; Paiguy Armand Ngouateu Wouagfack, Auteur ; Réné Tchinda, Auteur Année de publication : 2014 Article en page(s) : pp. 118–127 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Absorption  refrigeration  system;  Internal  irreversibility;  Optimization;  Ecological  coefficient  of  performance Résumé : Irreversibility is a phenomenon that affects much the performance of absorption refrigeration systems. Internal irreversibility is produced by the dissipation of the working fluid. This paper studies and analyzes the effect of two internal irreversibilities parameters (the internal irreversibility parameter for generator–absorber assembly and the internal irreversibility parameter for condenser–evaporator assembly) on the optimal ecological performances of an irreversible three-heat-source absorption refrigerator based on the ECOP criterion. The results obtained show that the internal irreversibility parameter for condenser–evaporator assembly affects more the ecological performance of the system than the internal irreversibility parameter for generator–absorber assembly. This is of importance to the optimal design and performance improvement of absorption refrigeration cycles. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002740 [article] Influence of two internal irreversibilities on the new thermo-ecological criterion for three-heat-source refrigerators = Influence de deux irréversibilités internes sur les nouveaux critères thermo-écologiques des réfrigérateurs à triple source de chaleur [texte imprimé] / Brigitte Astrid Medjo Nouadje, Auteur ; Paiguy Armand Ngouateu Wouagfack, Auteur ; Réné Tchinda, Auteur . - 2014 . - pp. 118–127. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 38 (Février 2014) . - pp. 118–127 Mots-clés : Absorption  refrigeration  system;  Internal  irreversibility;  Optimization;  Ecological  coefficient  of  performance Résumé : Irreversibility is a phenomenon that affects much the performance of absorption refrigeration systems. Internal irreversibility is produced by the dissipation of the working fluid. This paper studies and analyzes the effect of two internal irreversibilities parameters (the internal irreversibility parameter for generator–absorber assembly and the internal irreversibility parameter for condenser–evaporator assembly) on the optimal ecological performances of an irreversible three-heat-source absorption refrigerator based on the ECOP criterion. The results obtained show that the internal irreversibility parameter for condenser–evaporator assembly affects more the ecological performance of the system than the internal irreversibility parameter for generator–absorber assembly. This is of importance to the optimal design and performance improvement of absorption refrigeration cycles. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002740

Performance optimization of three-heat-source irreversible refrigerators based on a new thermo-ecological criterion / Paiguy Armand Ngouateu Wouagfack in International journal of refrigeration, Vol. 34 N° 4 (Juin 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 1008-1015 Titre : Performance optimization of three-heat-source irreversible refrigerators based on a new thermo-ecological criterion Titre original : Optimisation de la performance des systèmes frigorifiques à absorption irréversibles à trois sources de chaleur fondée sur un nouveau critère thermoécologique Type de document : texte imprimé Auteurs : Paiguy Armand Ngouateu Wouagfack, Auteur ; Réné Tchinda, Auteur Année de publication : 2011 Article en page(s) : pp. 1008-1015 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Irreversible  Refrigeration  system  Heat  sources  Coefficient  of  performance  Environment  Absorption Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : This paper presents an optimization study of an irreversible refrigeration absorption system based on a new thermo-ecological criterion. The considered objective function is the ecological coefficient of performance (ECOP). It takes into account the first and second law of thermodynamics and is defined as the cooling load per unit loss rate of availability. The ecological coefficient of performance has been expressed and maximized according to the temperatures of the working fluid in the main components of the system. The corresponding optimal temperatures and other optimum performance parameters have been derived analytically, and the effects of the internal irreversibility, the heat leakage coefficient and the source temperature ratio on the global and optimal performances are discussed. The results show that the maximum coefficient of performance (COP) and ecological coefficient of performance (ECOP) occurs for the same operating conditions. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070071100017X [article] Performance optimization of three-heat-source irreversible refrigerators based on a new thermo-ecological criterion = Optimisation de la performance des systèmes frigorifiques à absorption irréversibles à trois sources de chaleur fondée sur un nouveau critère thermoécologique [texte imprimé] / Paiguy Armand Ngouateu Wouagfack, Auteur ; Réné Tchinda, Auteur . - 2011 . - pp. 1008-1015. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 1008-1015 Mots-clés : Irreversible  Refrigeration  system  Heat  sources  Coefficient  of  performance  Environment  Absorption Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : This paper presents an optimization study of an irreversible refrigeration absorption system based on a new thermo-ecological criterion. The considered objective function is the ecological coefficient of performance (ECOP). It takes into account the first and second law of thermodynamics and is defined as the cooling load per unit loss rate of availability. The ecological coefficient of performance has been expressed and maximized according to the temperatures of the working fluid in the main components of the system. The corresponding optimal temperatures and other optimum performance parameters have been derived analytically, and the effects of the internal irreversibility, the heat leakage coefficient and the source temperature ratio on the global and optimal performances are discussed. The results show that the maximum coefficient of performance (COP) and ecological coefficient of performance (ECOP) occurs for the same operating conditions. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070071100017X

The new thermo-ecological performance optimization of an irreversible three-heat-source absorption heat pump / Paiguy Armand Ngouateu Wouagfack in International journal of refrigeration, Vol. 35 N° 1 (Janvier 2012) 

Public ISBD [article]  in International journal of refrigeration > Vol. 35 N° 1 (Janvier 2012) . - pp. 79–87 Titre : The new thermo-ecological performance optimization of an irreversible three-heat-source absorption heat pump Titre original : Nouvelle optimisation thermo-écologique de la performance d'une pompe à chaleur irréversible à absorption munie de trois sources de chaleur Type de document : texte imprimé Auteurs : Paiguy Armand Ngouateu Wouagfack, Auteur ; Réné Tchinda, Auteur Année de publication : 2012 Article en page(s) : pp. 79–87 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Irreversibility  Heat  pump  Absorption  system  Heat  source  Performance  Environment Résumé : The new thermo-ecological performance optimization of an absorption heat pump operating between three temperature levels with the losses of heat resistance, internal irreversibility and leakage is analyzed by taking the ecological coefficient of performance (ECOP) as an objective function. The new thermo-ecological criterion takes into account the first and second law of thermodynamics and is defined as the heating rate per unit loss rate of availability. The ecological coefficient of performance has been expressed and maximized in terms of the temperatures of the working fluid in the main components of the system. The corresponding optimal temperatures and other optimum performance parameters have been derived analytically, and the effects of the internal irreversibility, the heat leakage coefficient and the source temperature ratio on the global and optimal performances are discussed. The obtained results may provide a general theoretical tool for the ecological design of absorption heat pumps. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711002246 [article] The new thermo-ecological performance optimization of an irreversible three-heat-source absorption heat pump = Nouvelle optimisation thermo-écologique de la performance d'une pompe à chaleur irréversible à absorption munie de trois sources de chaleur [texte imprimé] / Paiguy Armand Ngouateu Wouagfack, Auteur ; Réné Tchinda, Auteur . - 2012 . - pp. 79–87. Génie mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 35 N° 1 (Janvier 2012) . - pp. 79–87 Mots-clés : Irreversibility  Heat  pump  Absorption  system  Heat  source  Performance  Environment Résumé : The new thermo-ecological performance optimization of an absorption heat pump operating between three temperature levels with the losses of heat resistance, internal irreversibility and leakage is analyzed by taking the ecological coefficient of performance (ECOP) as an objective function. The new thermo-ecological criterion takes into account the first and second law of thermodynamics and is defined as the heating rate per unit loss rate of availability. The ecological coefficient of performance has been expressed and maximized in terms of the temperatures of the working fluid in the main components of the system. The corresponding optimal temperatures and other optimum performance parameters have been derived analytically, and the effects of the internal irreversibility, the heat leakage coefficient and the source temperature ratio on the global and optimal performances are discussed. The obtained results may provide a general theoretical tool for the ecological design of absorption heat pumps. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711002246