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Experimental study on thermal characteristics of ammonia flow boiling in a plate evaporator at low mass flux / Kohei Koyama in International journal of refrigeration, Vol. 38 (Février 2014) 

Public ISBD [article]  in International journal of refrigeration > Vol. 38 (Février 2014) . - pp. 227–235 Titre : Experimental study on thermal characteristics of ammonia flow boiling in a plate evaporator at low mass flux Titre original : Etude expérimentale des caractéristiques thermiques de l'ébullition en écoulement d'ammoniac dans un évaporateur de plaques à faible flux massique Type de document : texte imprimé Auteurs : Kohei Koyama, Auteur ; Hirotaka Chiyoda, Auteur ; Hirofumi Arima, Auteur Année de publication : 2014 Article en page(s) : pp. 227–235 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Flow  boiling;  Heat  transfer  coefficient;  Heat  exchanger;  OTEC;  Lockhart–Martinelli  parameter Résumé : Thermal characteristics of a plate evaporator using ammonia are experimentally investigated. The effects of mass flux, heat flux, channel height, and saturation pressure on heat transfer coefficient of the evaporator are discussed. The experiments are conducted for mass flux (5 and 7.5 kg m−2 s−1), heat flux (10, 15, and 20 kW m−2), channel height (1, 2, and 5 mm), and saturation pressure (0.7 and 0.9 MPa). Heat transfer coefficient is obtained as a function of quality for all experimental conditions. The characteristics of heat transfer coefficient are discussed and compared with those of earlier works. All experimental results are compiled by using Lockhart–Martinelli parameter. The developed empirical correlation predicts 85% of the experimental data within ±30% range. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002405 [article] Experimental study on thermal characteristics of ammonia flow boiling in a plate evaporator at low mass flux = Etude expérimentale des caractéristiques thermiques de l'ébullition en écoulement d'ammoniac dans un évaporateur de plaques à faible flux massique [texte imprimé] / Kohei Koyama, Auteur ; Hirotaka Chiyoda, Auteur ; Hirofumi Arima, Auteur . - 2014 . - pp. 227–235. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 38 (Février 2014) . - pp. 227–235 Mots-clés : Flow  boiling;  Heat  transfer  coefficient;  Heat  exchanger;  OTEC;  Lockhart–Martinelli  parameter Résumé : Thermal characteristics of a plate evaporator using ammonia are experimentally investigated. The effects of mass flux, heat flux, channel height, and saturation pressure on heat transfer coefficient of the evaporator are discussed. The experiments are conducted for mass flux (5 and 7.5 kg m−2 s−1), heat flux (10, 15, and 20 kW m−2), channel height (1, 2, and 5 mm), and saturation pressure (0.7 and 0.9 MPa). Heat transfer coefficient is obtained as a function of quality for all experimental conditions. The characteristics of heat transfer coefficient are discussed and compared with those of earlier works. All experimental results are compiled by using Lockhart–Martinelli parameter. The developed empirical correlation predicts 85% of the experimental data within ±30% range. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002405