Microchannel component technology for system-wide application in ammonia/water absorption heat pumps / Srinivas Garimella in International journal of refrigeration, Vol. 34 N° 5 (Août 2011)  

Public ISBD [article]  inInternational journal of refrigeration > Vol. 34 N° 5 (Août 2011) . - pp. 1184-1196 Titre : Microchannel component technology for system-wide application in ammonia/water absorption heat pumps Titre original : Technologie des composantes des minicanaux à appliquer aux systèmes à pompe à chaleur à absorption à ammoniac/eau Type de document : texte imprimé Auteurs : Srinivas Garimella, Auteur ; Matthew D. Determan, Auteur ; J. Mark Meacham, Auteur Année de publication : 2011 Article en page(s) : pp. 1184-1196 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Absorption Miniaturization Heat transfer Mass Microchannel Falling film Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : A novel miniaturization technology for binary-fluid heat and mass exchange was developed and numerous components were fabricated for demonstration as different parts of an ammonia/water absorption heat pump. Short lengths of microchannel tubes are placed in an array, with several such arrays stacked vertically. The ammonia/water solution flows in falling film/droplet mode on the outside of the tubes while coupling fluid flows through the microchannels. Coupling fluid heat transfer coefficients are extremely high due to the use of microchannel tubes. Effective vapor–solution contact on the absorption side minimizes heat and mass transfer resistances. This concept addresses all the requirements for absorber design in an extremely compact geometry. The technology is suitable for almost all absorption heat pump components (absorbers, desorbers, condensers, rectifiers, and evaporators) and for a wide range of binary-fluid processes. The development of several components for absorption and desorption at different capacities using this technology is reported here. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000685 [article] Microchannel component technology for system-wide application in ammonia/water absorption heat pumps = Technologie des composantes des minicanaux à appliquer aux systèmes à pompe à chaleur à absorption à ammoniac/eau [texte imprimé] / Srinivas Garimella, Auteur ; Matthew D. Determan, Auteur ; J. Mark Meacham, Auteur . - 2011 . - pp. 1184-1196. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 5 (Août 2011) . - pp. 1184-1196 Mots-clés : Absorption Miniaturization Heat transfer Mass Microchannel Falling film Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : A novel miniaturization technology for binary-fluid heat and mass exchange was developed and numerous components were fabricated for demonstration as different parts of an ammonia/water absorption heat pump. Short lengths of microchannel tubes are placed in an array, with several such arrays stacked vertically. The ammonia/water solution flows in falling film/droplet mode on the outside of the tubes while coupling fluid flows through the microchannels. Coupling fluid heat transfer coefficients are extremely high due to the use of microchannel tubes. Effective vapor–solution contact on the absorption side minimizes heat and mass transfer resistances. This concept addresses all the requirements for absorber design in an extremely compact geometry. The technology is suitable for almost all absorption heat pump components (absorbers, desorbers, condensers, rectifiers, and evaporators) and for a wide range of binary-fluid processes. The development of several components for absorption and desorption at different capacities using this technology is reported here. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000685

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