Local boiling heat transfer characteristics of ammonia in a vertical plate evaporator / H. Arima in International journal of refrigeration, Vol. 33 N° 2 (Mars 2010)  

Public ISBD [article]  inInternational journal of refrigeration > Vol. 33 N° 2 (Mars 2010) . - pp. 359-370 Titre : Local boiling heat transfer characteristics of ammonia in a vertical plate evaporator Titre original : Caractéristiques de transfert de chaleur lors de l’ébullition locale d’ammoniac dans un évaporateur à plaque verticale Type de document : texte imprimé Auteurs : H. Arima, Auteur ; J.H. Kim, Auteur ; A. Okamoto, Auteur Année de publication : 2011 Article en page(s) : pp. 359-370 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Heat exchanger Plate transfer Boiling Ammonia Measurement coefficient Visualization Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Ocean thermal energy conversion systems are expected to be the next-generation energy production systems. In these systems, a plate heat exchanger is used for improving the power generation efficiency, and ammonia or an ammonia/water mixture is used as a working fluid. In this study, boiling heat transfer coefficients of pure ammonia are measured on a vertical flat PHE (a plate heat exchanger), for elucidating and characterizing the behavior of ammonia on a compact plate evaporator, a type of PHE The measurement results show that local boiling heat transfer coefficients increase with increasing vapor quality. Further, the effects of saturation pressure, mass flow rate, and average heat flux on the boiling heat transfer coefficient are elucidated. An empirical correlation for the local boiling heat transfer coefficient is derived using the Lockhart-Martinelli parameter. Further, a visualization experiment of boiling phenomena of ammonia is performed to elucidate the relation between boiling behavior and heat transfer. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070070900228X [article] Local boiling heat transfer characteristics of ammonia in a vertical plate evaporator = Caractéristiques de transfert de chaleur lors de l’ébullition locale d’ammoniac dans un évaporateur à plaque verticale [texte imprimé] / H. Arima, Auteur ; J.H. Kim, Auteur ; A. Okamoto, Auteur . - 2011 . - pp. 359-370. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 2 (Mars 2010) . - pp. 359-370 Mots-clés : Heat exchanger Plate transfer Boiling Ammonia Measurement coefficient Visualization Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Ocean thermal energy conversion systems are expected to be the next-generation energy production systems. In these systems, a plate heat exchanger is used for improving the power generation efficiency, and ammonia or an ammonia/water mixture is used as a working fluid. In this study, boiling heat transfer coefficients of pure ammonia are measured on a vertical flat PHE (a plate heat exchanger), for elucidating and characterizing the behavior of ammonia on a compact plate evaporator, a type of PHE The measurement results show that local boiling heat transfer coefficients increase with increasing vapor quality. Further, the effects of saturation pressure, mass flow rate, and average heat flux on the boiling heat transfer coefficient are elucidated. An empirical correlation for the local boiling heat transfer coefficient is derived using the Lockhart-Martinelli parameter. Further, a visualization experiment of boiling phenomena of ammonia is performed to elucidate the relation between boiling behavior and heat transfer. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070070900228X

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