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Heat transfer from immersed surfaces in liquid fluidised beds

✍ Scribed by J.F. Richardson; M.N. Romani; K.J. Shakiri

Publisher: Elsevier Science
Year: 1976
Tongue: English
Weight: 586 KB
Volume: 31
Category: Article
ISSN: 0009-2509
DOI: 10.1016/0009-2509(76)87002-9

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✦ Synopsis

Heat transfer data were obtained using a small electrically-heated simulated plate immersed in a liquid-fluidised bed. For steel balls and for spherical and cylindrical particles of glass fluidised by dimethyl phthalate, two correlations valid over the voidage range 0.40-0.85 were obtained; one was based on the Reynolds number (Reo), involving the particle diameter and its terminal falling velocity, and the other on a modified Reynolds number (Re,) incorporating the interstitial velocity and the volume: surface ratio of the voids. and log [St Reo"3]-' = 1.90e + K eJ,, = 0.34 Rem?.

In the above eqns, St is the Stanton number, J, the Colbum heat transfer factor and e the voidage. K is a constant depending on the properties of the solid particles.

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