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Effect of oil on two-phase pressure drop of refrigerant flow boiling inside circular tubes filled with metal foam / Haitao Hu in International journal of refrigeration, Vol. 36 N° 2 (N° spécial) (Mars 2013) 

Public ISBD [article]  in International journal of refrigeration > Vol. 36 N° 2 (N° spécial) (Mars 2013) . - pp. 516–526 Titre : Effect of oil on two-phase pressure drop of refrigerant flow boiling inside circular tubes filled with metal foam Titre original : Effet de l'huile sur la chute de pression diphasique du frigorigène lors de l'ébullition en écoulement à l'intérieur de tubes circulaires remplis de mousse métallique Type de document : texte imprimé Auteurs : Haitao Hu, Auteur ; Yu Zhu, Auteur ; Shuo Sun, Auteur Année de publication : 2013 Article en page(s) : pp. 516–526 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Correlation;  Flow  boiling;  Metal  foam;  Oil;  Pressure  drop Résumé : Two-phase pressure drop characteristics of refrigerant-oil mixture in circular tubes filled with metal foam were experimentally investigated. Experimental conditions cover nominal oil concentrations from 0% to 5%, metal foam structures of 5 PPI and 10 PPI, vapor qualities from 0.2 to 0.8, and mass fluxes from 30 to 90 kg/m2s. The test results show that the pressure drop increases with the increase of oil concentration, mass flux or vapor quality. The presence of oil increases pressure drop by a maximum of 25% and 50% for 5 PPI and 10 PPI metal foams, respectively. The enhancement effect of oil for high PPI metal foam is more evident than that for low PPI metal foam. A correlation for predicting the two-phase pressure drop of refrigerant-oil mixture in circular metal-foam tubes was developed, and it agrees with 90% of the experimental data within a deviation of ±20%. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700712002976 [article] Effect of oil on two-phase pressure drop of refrigerant flow boiling inside circular tubes filled with metal foam = Effet de l'huile sur la chute de pression diphasique du frigorigène lors de l'ébullition en écoulement à l'intérieur de tubes circulaires remplis de mousse métallique [texte imprimé] / Haitao Hu, Auteur ; Yu Zhu, Auteur ; Shuo Sun, Auteur . - 2013 . - pp. 516–526. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 2 (N° spécial) (Mars 2013) . - pp. 516–526 Mots-clés : Correlation;  Flow  boiling;  Metal  foam;  Oil;  Pressure  drop Résumé : Two-phase pressure drop characteristics of refrigerant-oil mixture in circular tubes filled with metal foam were experimentally investigated. Experimental conditions cover nominal oil concentrations from 0% to 5%, metal foam structures of 5 PPI and 10 PPI, vapor qualities from 0.2 to 0.8, and mass fluxes from 30 to 90 kg/m2s. The test results show that the pressure drop increases with the increase of oil concentration, mass flux or vapor quality. The presence of oil increases pressure drop by a maximum of 25% and 50% for 5 PPI and 10 PPI metal foams, respectively. The enhancement effect of oil for high PPI metal foam is more evident than that for low PPI metal foam. A correlation for predicting the two-phase pressure drop of refrigerant-oil mixture in circular metal-foam tubes was developed, and it agrees with 90% of the experimental data within a deviation of ±20%. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700712002976

Heat transfer measurements and correlation of refrigerant flow boiling in tube filled with copper foam / Yu Zhu in International journal of refrigeration, Vol. 38 (Février 2014) 

Public ISBD [article]  in International journal of refrigeration > Vol. 38 (Février 2014) . - pp. 215–226 Titre : Heat transfer measurements and correlation of refrigerant flow boiling in tube filled with copper foam Titre original : Mesures du transfert de chaleur et corrélation entre les mesures et l'ébullition en écoulement du frigorigène à l'intérieur d'un tube rempli de mousse de cuivre Type de document : texte imprimé Auteurs : Yu Zhu, Auteur ; Haitao Hu, Auteur ; Shuo Sun, Auteur Année de publication : 2014 Article en page(s) : pp. 215–226 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Metal  foam;  Flow;  Boiling;  Flow  pattern;  Heat  transfer;  Correlation Résumé : Flow boiling heat transfer characteristics of refrigerant in tubes filled with metal foams were experimentally investigated at a saturation temperature of 7 °C, mass flux from 10 to 90 kg m−2 s−1, vapor quality from 0.1 to 0.8 and heat flux from 3.1 to 18.3 kW m−2. The refrigerant is R410A. The test sections are tubes with inner diameter of 23.4 or 13.8 mm, filled with 5 or 10 PPI copper foam. The experimental results reveal that, metal foam enhances the flow boiling heat transfer by a maximum of 220% and promotes the flow pattern transition from stratified flow to stratified-wavy flow and from stratified-wavy flow to annular flow. The heat transfer coefficient decreases with vapor quality under low mass flux, while it increases with vapor quality under high mass flux. A correlation for predicting the flow boiling heat transfer was developed and it agrees well with the experimental data. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713001011 [article] Heat transfer measurements and correlation of refrigerant flow boiling in tube filled with copper foam = Mesures du transfert de chaleur et corrélation entre les mesures et l'ébullition en écoulement du frigorigène à l'intérieur d'un tube rempli de mousse de cuivre [texte imprimé] / Yu Zhu, Auteur ; Haitao Hu, Auteur ; Shuo Sun, Auteur . - 2014 . - pp. 215–226. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 38 (Février 2014) . - pp. 215–226 Mots-clés : Metal  foam;  Flow;  Boiling;  Flow  pattern;  Heat  transfer;  Correlation Résumé : Flow boiling heat transfer characteristics of refrigerant in tubes filled with metal foams were experimentally investigated at a saturation temperature of 7 °C, mass flux from 10 to 90 kg m−2 s−1, vapor quality from 0.1 to 0.8 and heat flux from 3.1 to 18.3 kW m−2. The refrigerant is R410A. The test sections are tubes with inner diameter of 23.4 or 13.8 mm, filled with 5 or 10 PPI copper foam. The experimental results reveal that, metal foam enhances the flow boiling heat transfer by a maximum of 220% and promotes the flow pattern transition from stratified flow to stratified-wavy flow and from stratified-wavy flow to annular flow. The heat transfer coefficient decreases with vapor quality under low mass flux, while it increases with vapor quality under high mass flux. A correlation for predicting the flow boiling heat transfer was developed and it agrees well with the experimental data. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713001011