Filmwise condensation over a tier of sphere

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2006
Çobanoğlu, Tamer
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The objective of this study is to determine the mean heat transfer coefficient and heat transfer rate and to analyse the effect of inclination angles,the effect of subcooling temperatures and the effect of vapour velocity for laminar filmwise condensation of water vapour on a vertical tier of spheres experimentaly and analyticaly. For this purpose, the experimental aparatus were designed and manufactured. In the free condensation experimental study Ø50mm and Ø60 mm O.D. spheres were used to analyse the diameter effect . In the experimental studies of free and forced condensation Ø60mm O.D. spheres on which vapour flows at 2,75 bars were used to analyse the effect of vapour velocity. For the experimental study of the annular condensation in the concentric spheres the effect of vapour velocity was studied by forcing the vapour to flow in the area between two concentric spheres. In the free condensation experiments it is observed that at smaller diameters the heat flux and mean heat transfer coefficients for sphere is higher. In the free and forced condensation experiments increasing the velocity of vapour increases the mean heat transfer coefficient. At the experiments with annular condensation between the concentric spheres high mean heat transfer coefficient values have been obtained compared to the free and forced condansation over the surface of spheres experimental studies.
Mechanics of Engineering.
http://etd.lib.metu.edu.tr/upload/12607923/index.pdf
https://hdl.handle.net/11511/16470
Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats
T. Çobanoğlu, “Filmwise condensation over a tier of sphere,” M.S. - Master of Science, Middle East Technical University, 2006.
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