ISSN Online: 2377-424X
International Heat Transfer Conference 3
FUNDAMENTAL STUDY ON DROPWISE CONDENSATION
Résumé
By utilizing the excellent durability of dimethyl-polysiloxane [(CH3)2SiO]n
as a promoter to the copper cooling surface, the process of condensation was
observed microscopically. From the results, the relationships between the
average diameters of contacted droplets and their numbers, the fraction of area
covered with droplets and the heat transfer through a thin liquid film and the
submicroscopic droplets, and also the formation of a certain critical thickness
film before the minimum droplets appear and its part played in the dropwise
condensation process, have been examined. Further the critical time of the
thin film and the steam-side local heat transfer coefficient were calculated
and compared with the experimental values.