Fluid to particle heat transfer in fluidized beds of mixed-sized particles
β Scribed by Peishi Chen; David C. T. Pei
- Book ID
- 112054786
- Publisher
- John Wiley and Sons
- Year
- 1984
- Tongue
- English
- Weight
- 426 KB
- Volume
- 62
- Category
- Article
- ISSN
- 0008-4034
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π SIMILAR VOLUMES
Partlcle-to-emulsion and mterpartrcle heat transfer rates were estimated in the range 1 5 G u/u,,,f 6 3 5, 0 69 c $ G 2 15 mm by drymg wet refractory partlcles m fluldlzed beds of smular dry partlcles of the same sues Overall particle-toemulslon heat transfer coefficients decrease roughly as the mve
Abstraet-Fluid-particle heat transfer in lixed and fluid&d beds is re-examined. The heat transfer factor depends not only on the particle Reynolds number but also on the void fraction of the bed. The available experimental data has been correlated to yield a non-linear relationship between rJh and t
A physically based model is proposed for heat transfer to immersed surfaces in large particle fluidized beds. ' Large' particlesare distinguished as those with thermal time constants substantially greater than their residencetime at a heat tran sfersurface. At typical fluidized bed combustor operati