Documents disponibles écrits par cet auteur

Carbon dioxide heat transfer coefficients and pressure drops during flow boiling / R. Mastrullo in International journal of refrigeration, Vol. 33 N° 6 (Septembre 2010) 

Public ISBD [article]  in International journal of refrigeration > Vol. 33 N° 6 (Septembre 2010) . - pp. 1068-1085 Titre : Carbon dioxide heat transfer coefficients and pressure drops during flow boiling : Assessment of predictive methods Titre original : Coefficients de transfert de chaleur et chute de pression du dioxyde de carbone lors de l'ébullition en écoulement : évaluation des méthodes prévisionnelles Type de document : texte imprimé Auteurs : R. Mastrullo, Auteur ; A.W. Mauro, Auteur ; A. Rosato, Auteur Année de publication : 2010 Article en page(s) : pp. 1068-1085 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Heat  exchanger  Boiling  Carbon  dioxide-review  Heat  transfer  coefficient  Pressure  drop  Comparison-experiment Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Among the alternatives to the HCFCs and HFCs, carbon dioxide emerged as one of the most promising environmentally friendly refrigerants. In past years many works were carried out about CO2 flow boiling and very different two-phase flow characteristics from conventional fluids were found. In order to assess the best predictive methods for the evaluation of CO2 heat transfer coefficients and pressure gradients in macro-channels, in the current article a literature survey of works and a collection of the results of statistical comparisons available in literature are furnished. In addition the experimental data from University of Naples are used to run a deeper analysis. Both a statistical and a direct comparison against some of the most quoted predictive methods are carried out. Methods implemented both for low–medium pressure refrigerants and specifically developed for R744 are used in the comparison. Some general indications about the choice of the predictive methods dependently on the operating conditions are given. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000757 [article] Carbon dioxide heat transfer coefficients and pressure drops during flow boiling = Coefficients de transfert de chaleur et chute de pression du dioxyde de carbone lors de l'ébullition en écoulement : évaluation des méthodes prévisionnelles : Assessment of predictive methods [texte imprimé] / R. Mastrullo, Auteur ; A.W. Mauro, Auteur ; A. Rosato, Auteur . - 2010 . - pp. 1068-1085. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 6 (Septembre 2010) . - pp. 1068-1085 Mots-clés : Heat  exchanger  Boiling  Carbon  dioxide-review  Heat  transfer  coefficient  Pressure  drop  Comparison-experiment Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Among the alternatives to the HCFCs and HFCs, carbon dioxide emerged as one of the most promising environmentally friendly refrigerants. In past years many works were carried out about CO2 flow boiling and very different two-phase flow characteristics from conventional fluids were found. In order to assess the best predictive methods for the evaluation of CO2 heat transfer coefficients and pressure gradients in macro-channels, in the current article a literature survey of works and a collection of the results of statistical comparisons available in literature are furnished. In addition the experimental data from University of Naples are used to run a deeper analysis. Both a statistical and a direct comparison against some of the most quoted predictive methods are carried out. Methods implemented both for low–medium pressure refrigerants and specifically developed for R744 are used in the comparison. Some general indications about the choice of the predictive methods dependently on the operating conditions are given. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000757

Preliminary experimental characterization of a three-phase absorption heat pump / A. Rosato 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. 717–729 Titre : Preliminary experimental characterization of a three-phase absorption heat pump Titre original : Caractérisation expérimentale préliminaire d'une pompe à chaleur à trois phases Type de document : texte imprimé Auteurs : A. Rosato, Auteur ; S. Sibilio, Auteur Année de publication : 2013 Article en page(s) : pp. 717–729 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Absorption  cycle;  Thermally  driven  chiller;  Chemical  heat  pump;  Lithium  chloride;  Solar  cooling;  Trigeneration Résumé : In this paper a recently commercialized three-phase absorption heat pump that is capable of storing energy internally in the form of crystallized salt (LiCl) with water as refrigerant has been experimentally investigated during summer period. The tests have been performed with the aim to investigate the operation logic of the machine and to highlight both the reliability and the efficiency of the system over an operating conditions range of great practical interest. The measured performance have been compared with those of a conventional electrically driven vapor compression refrigerating system from an energy, environmental and economic point of view in order to assess the suitability of the absorption heat pump: this comparison showed that the absorption system is potentially able to guarantee an energy saving, a reduction of carbon dioxide emissions and a lower operating cost only in case of the most part (at least 70%) of required thermal energy is supplied by solar collectors. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700712003234 [article] Preliminary experimental characterization of a three-phase absorption heat pump = Caractérisation expérimentale préliminaire d'une pompe à chaleur à trois phases [texte imprimé] / A. Rosato, Auteur ; S. Sibilio, Auteur . - 2013 . - pp. 717–729. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 3 (Mai 2013) . - pp. 717–729 Mots-clés : Absorption  cycle;  Thermally  driven  chiller;  Chemical  heat  pump;  Lithium  chloride;  Solar  cooling;  Trigeneration Résumé : In this paper a recently commercialized three-phase absorption heat pump that is capable of storing energy internally in the form of crystallized salt (LiCl) with water as refrigerant has been experimentally investigated during summer period. The tests have been performed with the aim to investigate the operation logic of the machine and to highlight both the reliability and the efficiency of the system over an operating conditions range of great practical interest. The measured performance have been compared with those of a conventional electrically driven vapor compression refrigerating system from an energy, environmental and economic point of view in order to assess the suitability of the absorption heat pump: this comparison showed that the absorption system is potentially able to guarantee an energy saving, a reduction of carbon dioxide emissions and a lower operating cost only in case of the most part (at least 70%) of required thermal energy is supplied by solar collectors. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700712003234