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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 characteristics of refrigerant-oil mixtures flow boiling in a horizontal C-shape curved smooth tube / Haitao Hu in International journal of refrigeration, Vol. 33 N° 5 (Août 2010) 

Public ISBD [article]  in International journal of refrigeration > Vol. 33 N° 5 (Août 2010) . - pp. 932-943 Titre : Heat transfer characteristics of refrigerant-oil mixtures flow boiling in a horizontal C-shape curved smooth tube Titre original : Caractéristiques du transfert de chaleur de mélanges frigorigène/huile en ébullition en écoulement à l'intérieur d'un tube lisse horizontal sous forme de C Type de document : texte imprimé Auteurs : Haitao Hu, Auteur ; Guoliang Ding, Auteur ; Wenjian Wei, Auteur Année de publication : 2010 Article en page(s) : pp. 932-943 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Heat  exchanger  Geometry  Heat  transfer  Boiling  Mixture  Refrigerant  Oil  Correlation Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Two-phase heat transfer characteristics of R410A–POE oil mixture and R22-mineral oil mixture flow boiling inside a horizontal C-shape curved smooth tube with an outside diameter of 7.0 mm and a curvature ratio of 60 were investigated experimentally. The test results show that the curvature of C-shape curved smooth tube deteriorates the flow boiling heat transfer, and the ratios of the heat transfer coefficients in C-shape curved smooth tube to those in straight smooth tube for R410A–oil mixture and R22–oil mixture are within 0.46–0.74 and 0.74–0.90, respectively. A correlation to predict the heat transfer coefficients of refrigerant-oil mixtures flow boiling inside C-shape curved smooth tube was developed based on mixture properties of refrigerant-oil, and it could agree with 96% of the experimental data within a deviation of ±20%. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000411 [article] Heat transfer characteristics of refrigerant-oil mixtures flow boiling in a horizontal C-shape curved smooth tube = Caractéristiques du transfert de chaleur de mélanges frigorigène/huile en ébullition en écoulement à l'intérieur d'un tube lisse horizontal sous forme de C [texte imprimé] / Haitao Hu, Auteur ; Guoliang Ding, Auteur ; Wenjian Wei, Auteur . - 2010 . - pp. 932-943. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 5 (Août 2010) . - pp. 932-943 Mots-clés : Heat  exchanger  Geometry  Heat  transfer  Boiling  Mixture  Refrigerant  Oil  Correlation Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Two-phase heat transfer characteristics of R410A–POE oil mixture and R22-mineral oil mixture flow boiling inside a horizontal C-shape curved smooth tube with an outside diameter of 7.0 mm and a curvature ratio of 60 were investigated experimentally. The test results show that the curvature of C-shape curved smooth tube deteriorates the flow boiling heat transfer, and the ratios of the heat transfer coefficients in C-shape curved smooth tube to those in straight smooth tube for R410A–oil mixture and R22–oil mixture are within 0.46–0.74 and 0.74–0.90, respectively. A correlation to predict the heat transfer coefficients of refrigerant-oil mixtures flow boiling inside C-shape curved smooth tube was developed based on mixture properties of refrigerant-oil, and it could agree with 96% of the experimental data within a deviation of ±20%. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000411

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

Influence of oil on nucleate pool boiling heat transfer of refrigerant on metal foam covers / Yu Zhu in International journal of refrigeration, Vol. 34 N° 2 (Mars 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 2 (Mars 2011) . - pp. 509-517 Titre : Influence of oil on nucleate pool boiling heat transfer of refrigerant on metal foam covers Titre original : Influence de l'huile sur le transfert de chaleur lors de l'ébullition libre nucléée d'un frigorigène sur des mousses métalliques Type de document : texte imprimé Auteurs : Yu Zhu, Auteur ; Haitao Hu, Auteur ; Guoliang Ding, Auteur Année de publication : 2011 Article en page(s) : pp. 509-517 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Correlation  Foam  Metal  Oil  Pool  boiling  Refrigerant Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Nucleate pool boiling heat transfer characteristics of refrigerant/oil mixture on metal foam covers were experimentally investigated. The refrigerant is R113, and the oil is VG68. The copper foams, having ppi (pores per inch) of 10 and 20, porosity from 90% to 98%, and thickness of 5 mm, are selected in this study. Experimental conditions include a saturation pressure of 101 kPa, oil concentrations from 0 to 5%, and heat fluxes from 0 to 80 kW m−2. The experimental results indicate that the nucleate pool boiling heat transfer coefficient on copper foam covers is larger than that on flat heated surface by a maximum of 160% under the present experimental conditions; the presence of oil deteriorates the nucleate pool boiling heat transfer on copper foam covers by a maximum of 15% under the present experimental conditions, and the deterioration of oil on nucleate pool boiling heat transfer on copper foam covers is lower than that on a flat heated surface. A correlation for predicting the nucleate pool boiling heat transfer coefficient of refrigerant/oil mixture on copper foam cover is developed, and it agrees with 95% of the experimental data within a deviation of ±20%. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710002355 [article] Influence of oil on nucleate pool boiling heat transfer of refrigerant on metal foam covers = Influence de l'huile sur le transfert de chaleur lors de l'ébullition libre nucléée d'un frigorigène sur des mousses métalliques [texte imprimé] / Yu Zhu, Auteur ; Haitao Hu, Auteur ; Guoliang Ding, Auteur . - 2011 . - pp. 509-517. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 2 (Mars 2011) . - pp. 509-517 Mots-clés : Correlation  Foam  Metal  Oil  Pool  boiling  Refrigerant Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Nucleate pool boiling heat transfer characteristics of refrigerant/oil mixture on metal foam covers were experimentally investigated. The refrigerant is R113, and the oil is VG68. The copper foams, having ppi (pores per inch) of 10 and 20, porosity from 90% to 98%, and thickness of 5 mm, are selected in this study. Experimental conditions include a saturation pressure of 101 kPa, oil concentrations from 0 to 5%, and heat fluxes from 0 to 80 kW m−2. The experimental results indicate that the nucleate pool boiling heat transfer coefficient on copper foam covers is larger than that on flat heated surface by a maximum of 160% under the present experimental conditions; the presence of oil deteriorates the nucleate pool boiling heat transfer on copper foam covers by a maximum of 15% under the present experimental conditions, and the deterioration of oil on nucleate pool boiling heat transfer on copper foam covers is lower than that on a flat heated surface. A correlation for predicting the nucleate pool boiling heat transfer coefficient of refrigerant/oil mixture on copper foam cover is developed, and it agrees with 95% of the experimental data within a deviation of ±20%. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710002355

Influences of refrigerant-based nanofluid composition and heating condition on the migration of nanoparticles during pool boiling. / Peng, Hao in International journal of refrigeration, Vol. 34 N° 8 (Décembre 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 8 (Décembre 2011) . - pp. 1823–1832 Titre : Influences of refrigerant-based nanofluid composition and heating condition on the migration of nanoparticles during pool boiling. : Part I: Experimental measurement Titre original : Influences de la composition et le chauffage d'un nanofluide sur la migration des nanoparticules lors de l'ébullition libre. Partie I : mesures expérimentales Type de document : texte imprimé Auteurs : Peng, Hao, Auteur ; Guoliang Ding, Auteur ; Haitao Hu, Auteur Année de publication : 2012 Article en page(s) : pp. 1823–1832 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Heat  flux  Oil  Particle  Pool  boiling  Refrigerant Résumé : Influences of refrigerant-based nanofluid composition and heating condition on the migration of nanoparticles during pool boiling were investigated experimentally. The nanoparticles include Cu (average diameters of 20, 50 and 80 nm), Al and Al2O3 (average diameters of 20 nm), and CuO (average diameter of 40 nm). The refrigerants include R113, R141b and n-pentane. The mass fraction of lubricating oil RB68EP is from 0 to 10 wt%, the heat flux is from 10 to 100 kW m−2, and the initial liquid-level height is from 1.3 to 3.4 cm. The experimental results show that the migration ratio of nanoparticles during the pool boiling of refrigerant-based nanofluid increases with the decrease of nanoparticle density, nanoparticle size, dynamic viscosity of refrigerant, mass fraction of lubricating oil or heat flux; while increases with the increase of liquid-phase density of refrigerant or initial liquid-level height. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711001848 [article] Influences of refrigerant-based nanofluid composition and heating condition on the migration of nanoparticles during pool boiling. = Influences de la composition et le chauffage d'un nanofluide sur la migration des nanoparticules lors de l'ébullition libre. Partie I : mesures expérimentales : Part I: Experimental measurement [texte imprimé] / Peng, Hao, Auteur ; Guoliang Ding, Auteur ; Haitao Hu, Auteur . - 2012 . - pp. 1823–1832. Génie mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 8 (Décembre 2011) . - pp. 1823–1832 Mots-clés : Heat  flux  Oil  Particle  Pool  boiling  Refrigerant Résumé : Influences of refrigerant-based nanofluid composition and heating condition on the migration of nanoparticles during pool boiling were investigated experimentally. The nanoparticles include Cu (average diameters of 20, 50 and 80 nm), Al and Al2O3 (average diameters of 20 nm), and CuO (average diameter of 40 nm). The refrigerants include R113, R141b and n-pentane. The mass fraction of lubricating oil RB68EP is from 0 to 10 wt%, the heat flux is from 10 to 100 kW m−2, and the initial liquid-level height is from 1.3 to 3.4 cm. The experimental results show that the migration ratio of nanoparticles during the pool boiling of refrigerant-based nanofluid increases with the decrease of nanoparticle density, nanoparticle size, dynamic viscosity of refrigerant, mass fraction of lubricating oil or heat flux; while increases with the increase of liquid-phase density of refrigerant or initial liquid-level height. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711001848

Influences of refrigerant-based nanofluid composition and heating condition on the migration of nanoparticles during pool boiling. / Peng, Hao in International journal of refrigeration, Vol. 34 N° 8 (Décembre 2011) 

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Nucleate pool boiling heat transfer characteristics of refrigerant/nanolubricant mixture with surfactant / Haitao Hu in International journal of refrigeration, Vol. 36 N° 3 (Mai 2013) 

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Nucleate pool boiling heat transfer characteristics of refrigerant/oil mixture with diamond nanoparticles / Peng, Hao in International journal of refrigeration, Vol. 33 N° 2 (Mars 2010) 

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