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Flow boiling heat transfer characteristics of nano-refrigerants in a horizontal tube / Bin Sun in International journal of refrigeration, Vol. 38 (Février 2014) 

Public ISBD [article]  in International journal of refrigeration > Vol. 38 (Février 2014) . - pp. 206–214 Titre : Flow boiling heat transfer characteristics of nano-refrigerants in a horizontal tube Titre original : Caractéristiques du transfert de chaleur d'écoulement en ébullition de nano-frigorigènes dans un tube horizontal Type de document : texte imprimé Auteurs : Bin Sun, Auteur ; Di Yang, Auteur Année de publication : 2014 Article en page(s) : pp. 206–214 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Nano-refrigerant;  Heat  transfer  enhancement;  Flow  boiling Résumé : The flow boiling heat transfer characteristics of four nano-refrigerants with different mass fractions, qualities, and mass velocities in a horizontal tube were studied. The nano-refrigerants were Cu-R141b, Al-R141b, Al2O3-R141b, and CuO-R141b. The nanoparticle mass fractions were 0.1 wt%, 0.2 wt%, and 0.3 wt%; the quality ranged within 0.3–0.8; and the mass velocities were 120, 210, and 330 kg m−2 s−1. Results showed that the flow boiling heat transfer was enhanced by nanoparticle addition. The heat transfer coefficient of the nano-refrigerant increased with increased mass fraction, quality, and mass velocity. The mass fraction of nanoparticles was the main factor that influenced the heat transfer coefficient. The heat transfer enhancement effects of the different nano-refrigerants differed, with the highest enhancement achieved using Cu-R141b. At G = 120 kg m−2 s−1 and 0.3 wt% mass fraction, the maximum heat transfer coefficient of Cu-R141b increased by 49% (average increase = 27%). En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002284 [article] Flow boiling heat transfer characteristics of nano-refrigerants in a horizontal tube = Caractéristiques du transfert de chaleur d'écoulement en ébullition de nano-frigorigènes dans un tube horizontal [texte imprimé] / Bin Sun, Auteur ; Di Yang, Auteur . - 2014 . - pp. 206–214. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 38 (Février 2014) . - pp. 206–214 Mots-clés : Nano-refrigerant;  Heat  transfer  enhancement;  Flow  boiling Résumé : The flow boiling heat transfer characteristics of four nano-refrigerants with different mass fractions, qualities, and mass velocities in a horizontal tube were studied. The nano-refrigerants were Cu-R141b, Al-R141b, Al2O3-R141b, and CuO-R141b. The nanoparticle mass fractions were 0.1 wt%, 0.2 wt%, and 0.3 wt%; the quality ranged within 0.3–0.8; and the mass velocities were 120, 210, and 330 kg m−2 s−1. Results showed that the flow boiling heat transfer was enhanced by nanoparticle addition. The heat transfer coefficient of the nano-refrigerant increased with increased mass fraction, quality, and mass velocity. The mass fraction of nanoparticles was the main factor that influenced the heat transfer coefficient. The heat transfer enhancement effects of the different nano-refrigerants differed, with the highest enhancement achieved using Cu-R141b. At G = 120 kg m−2 s−1 and 0.3 wt% mass fraction, the maximum heat transfer coefficient of Cu-R141b increased by 49% (average increase = 27%). En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002284