Local boiling heat transfer characteristics of ammonia/water binary mixture in a vertical plate evaporator / H. Arima in International journal of refrigeration, Vol. 34 N° 3 (Mai 2011)  

Public ISBD [article]  inInternational journal of refrigeration > Vol. 34 N° 3 (Mai 2011) . - pp. 648-657 Titre : Local boiling heat transfer characteristics of ammonia/water binary mixture in a vertical plate evaporator Titre original : Caractéristiques du transfert de chaleur local lors de l'ébullition d'un mélange binaire ammoniac/eau dans un évaporateur à plaques vertical Type de document : texte imprimé Auteurs : H. Arima, Auteur ; A. Okamoto, Auteur ; Y. Ikegami, Auteur Année de publication : 2011 Article en page(s) : pp. 648-657 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Boiling-heat transfer Forced convection Ammonia Water Heat exchanger Plate Evaporator-vertical Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The next-generation energy production systems are expected to be based on ocean thermal energy conversion (OTEC) and discharged thermal energy conversion (DTEC). These systems use a plate-type evaporator and ammonia or an ammonia/water mixture as a working fluid. It is important to clarify heat transfer characteristics for designing efficient power generation systems. Measurements of local boiling heat transfer coefficients and visualizations were performed for an ammonia/water mixture (z = 0.9) on a vertical flat plate heat exchanger at a range of mass fluxes (7.5–15 kg m−2 s−1), heat fluxes (15–23 kW m−2), and pressures (0.7–0.9 MPa). The results show that in the case of an ammonia/water mixture, the local heat transfer coefficients increase with an increase in the vapor quality and mass flux and decrease with an increase in the heat flux. The influence of the flow pattern on the local heat transfer coefficient is also observed. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710002902 [article] Local boiling heat transfer characteristics of ammonia/water binary mixture in a vertical plate evaporator = Caractéristiques du transfert de chaleur local lors de l'ébullition d'un mélange binaire ammoniac/eau dans un évaporateur à plaques vertical [texte imprimé] / H. Arima, Auteur ; A. Okamoto, Auteur ; Y. Ikegami, Auteur . - 2011 . - pp. 648-657. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 3 (Mai 2011) . - pp. 648-657 Mots-clés : Boiling-heat transfer Forced convection Ammonia Water Heat exchanger Plate Evaporator-vertical Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The next-generation energy production systems are expected to be based on ocean thermal energy conversion (OTEC) and discharged thermal energy conversion (DTEC). These systems use a plate-type evaporator and ammonia or an ammonia/water mixture as a working fluid. It is important to clarify heat transfer characteristics for designing efficient power generation systems. Measurements of local boiling heat transfer coefficients and visualizations were performed for an ammonia/water mixture (z = 0.9) on a vertical flat plate heat exchanger at a range of mass fluxes (7.5–15 kg m−2 s−1), heat fluxes (15–23 kW m−2), and pressures (0.7–0.9 MPa). The results show that in the case of an ammonia/water mixture, the local heat transfer coefficients increase with an increase in the vapor quality and mass flux and decrease with an increase in the heat flux. The influence of the flow pattern on the local heat transfer coefficient is also observed. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710002902

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