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Boiling heat transfer of HFO-1234yf flowing in a smooth small-diameter horizontal tube / Shizuo Saitoh 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. 1846–1853 Titre : Boiling heat transfer of HFO-1234yf flowing in a smooth small-diameter horizontal tube Titre original : Transfert de chaleur lors de l’ébullition de HFO-1234yf à l’intérieur d’un tube horizontal lisse de faible diamètre Type de document : texte imprimé Auteurs : Shizuo Saitoh, Auteur ; Chaobin Dang, Auteur ; Yoshitaka Nakamura, Auteur Année de publication : 2012 Article en page(s) : pp. 1846–1853 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Boiling  Heat  transfer  Pressure  drop  HFO-1234yf  Tube  Small  diameter Résumé : The flow boiling heat transfer coefficient of the low-GWP (global warming potential) refrigerant HFO-1234yf inside a smooth small-diameter horizontal tube (inner diameter: 2 mm) was experimentally investigated. The local heat transfer coefficient was measured at heat fluxes of 6–24 kW m−2, mass fluxes of 100–400 kg m−2 s−1, an evaporating temperature of 288.15 K, and an inlet vapor quality of 0–0.25. The results show that the effect of heat flux on the heat transfer was large at low vapor quality, while the effect of mass flux was large at high vapor quality. The heat transfer coefficient of HFO-1234yf was almost the same as that of R-134a. The heat transfer coefficients calculated based on correlations with Saitoh et al. agreed well with the measured values compared to other correlations. The measured pressure drop agreed well with that predicted by the Lockhart–Martinelli correlation. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711001241# [article] Boiling heat transfer of HFO-1234yf flowing in a smooth small-diameter horizontal tube = Transfert de chaleur lors de l’ébullition de HFO-1234yf à l’intérieur d’un tube horizontal lisse de faible diamètre [texte imprimé] / Shizuo Saitoh, Auteur ; Chaobin Dang, Auteur ; Yoshitaka Nakamura, Auteur . - 2012 . - pp. 1846–1853. Génie mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 8 (Décembre 2011) . - pp. 1846–1853 Mots-clés : Boiling  Heat  transfer  Pressure  drop  HFO-1234yf  Tube  Small  diameter Résumé : The flow boiling heat transfer coefficient of the low-GWP (global warming potential) refrigerant HFO-1234yf inside a smooth small-diameter horizontal tube (inner diameter: 2 mm) was experimentally investigated. The local heat transfer coefficient was measured at heat fluxes of 6–24 kW m−2, mass fluxes of 100–400 kg m−2 s−1, an evaporating temperature of 288.15 K, and an inlet vapor quality of 0–0.25. The results show that the effect of heat flux on the heat transfer was large at low vapor quality, while the effect of mass flux was large at high vapor quality. The heat transfer coefficient of HFO-1234yf was almost the same as that of R-134a. The heat transfer coefficients calculated based on correlations with Saitoh et al. agreed well with the measured values compared to other correlations. The measured pressure drop agreed well with that predicted by the Lockhart–Martinelli correlation. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711001241#