Resumo

CAMARAZA-MEDINA, Yanán; CRUZ-FONTICIELLA, Oscar Miguel  e  GARCIA-MORALES, Osvaldo Fidel. Obtaining a model for the determination of the mean coefficient of heat transfer by condensation in ACC systems. RTQ [online]. 2018, vol.38, n.1, pp. 195-208. ISSN 2224-6185.

This paper presents the results of the continuity of the research process carried out at the Center for Energy Studies, belonging to the Faculty of Technical Sciences of the University of Matanzas, related to the production of dimensionless models for the determination of the mean coefficient of heat transfer by condensation Air Coleed Condenser (ACC) systems, inside straight and inclined tubes. The research consists in analytically obtaining the solution of the differential equation of the velocity profile, considering that the condensation is of the film type, finally the Roshenow empirical condition is combined with the theoretical solution, to generate a numerical expression that allows obtaining with A 15,2 % deviation in 2192 tests, a mean value of the heat transfer coefficient by condensation very similar to that obtained with the use of the most referenced model in the literature known and consulted, Chato's empirical model.

Palavras-chave : Roshenow correction; heat transfer coefficient; condensation.

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