Surface-to-bed heat transfer in fluidised beds of fine particles
โ Scribed by Francesco Di Natale; Amedeo Lancia; Roberto Nigro
- Book ID
- 108249935
- Publisher
- Elsevier Science
- Year
- 2009
- Tongue
- English
- Weight
- 888 KB
- Volume
- 195
- Category
- Article
- ISSN
- 0032-5910
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๐ SIMILAR VOLUMES
The dynamic response of a gas fluidised bed has been measured for a range of particle sizes of lead glass ballotini and a range of particle Reynolds numbers. A dispersion model has been formulated that includes the effects of gas and particle mixing,fluid-to-particle heat transfer and intraparticle
Nelson and Galloway's theory of particle to fluid mass transfer in dense systems of fine particles is re-examined and modified slightly to make it applicable to liquid fluidised beds. The resulting expression agrees with published data although these are inadequate to test it critically.
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