Calculation of Condensation Heat Transfer Coefficients of Fluted Tubes

Treatments based on the Gregorig model

Abstract

Methods were presented for calculating the condensation heat transfer coefficients of fluted tubes within the framework of the Gregorig model. Local film thicknesses were obtained for various cosine curve types of flute profile with pitch and height as geometrical parameters. The average Nusselt number is shown to be a function of pitch to height ratio alone. Inadequacies inherent in the original formulation have been pointed out.