Dynamic surface tension of heat transfer additives suitable for use in steam condensers and absorbers / Yong-Du Jun 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. 428-434 Titre : Dynamic surface tension of heat transfer additives suitable for use in steam condensers and absorbers Titre original : Tension superficielle dynamique des additifs favorisant le transfert de chaleur adaptés à l’utilisation dans les condenseurs de vapeur et les absorbeurs Type de document : texte imprimé Auteurs : Yong-Du Jun, Auteur ; Kwang J. Kim, Auteur ; John M. Kennedy, Auteur Année de publication : 2011 Article en page(s) : pp. 428-434 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Heat exchanger Absorber Condenser Measurement Surface tension Additive transfer Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Additives are often effectively used in enhancing heat transfer by creating a surface tension gradient on the surface of a condensate film to induce Marangoni driven “dropwise-like” condensation. The objective of the current study is to use the Maximum Bubble Pressure Method (MBPM) to evaluate dynamic behavior of the surface tension of solutions of three different additives (2-ethoxy ethanol, isobutylamine, and 2-ethyl-1-hexanol) of varying concentrations with water. It was shown that the effects of 2-ethoxy ethanol on surface tension was primarily dependent on solute concentration and showed little dependence on time (i.e. surface age of bubble). While both isobutylamine and 2-ethyl-1-hexanol showed strong dependence on both concentration and time, the effects of the later were far more dramatic. The results for all solutions are presented as functions of concentration and time (i.e. surface age of bubble). DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700709002667 [article] Dynamic surface tension of heat transfer additives suitable for use in steam condensers and absorbers = Tension superficielle dynamique des additifs favorisant le transfert de chaleur adaptés à l’utilisation dans les condenseurs de vapeur et les absorbeurs [texte imprimé] / Yong-Du Jun, Auteur ; Kwang J. Kim, Auteur ; John M. Kennedy, Auteur . - 2011 . - pp. 428-434. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 2 (Mars 2010) . - pp. 428-434 Mots-clés : Heat exchanger Absorber Condenser Measurement Surface tension Additive transfer Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Additives are often effectively used in enhancing heat transfer by creating a surface tension gradient on the surface of a condensate film to induce Marangoni driven “dropwise-like” condensation. The objective of the current study is to use the Maximum Bubble Pressure Method (MBPM) to evaluate dynamic behavior of the surface tension of solutions of three different additives (2-ethoxy ethanol, isobutylamine, and 2-ethyl-1-hexanol) of varying concentrations with water. It was shown that the effects of 2-ethoxy ethanol on surface tension was primarily dependent on solute concentration and showed little dependence on time (i.e. surface age of bubble). While both isobutylamine and 2-ethyl-1-hexanol showed strong dependence on both concentration and time, the effects of the later were far more dramatic. The results for all solutions are presented as functions of concentration and time (i.e. surface age of bubble). DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700709002667

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