Emulsion layer model for wall heat transfer in a circulating fluidized bed
- Heat Transfer and Thermal Power Lab., Dept. of Mechanical Engineering, Indian Inst. of Technology, Madras 600 036 (India)
In this paper, an emulsion layer model is presented which predicts the thickness of a downward-moving emulsion layer along the wall of a circulating fluidized bed, the mean solids velocity, and the solids flux in the layer. Also presented is a heat transfer model which, in combination with the emulsion layer model, predicts the low-temperature data very well. An alternate slab model proposed for the radiative component in a high-temperature circulating fluidized bed agrees well with experimental data. The heat transfer predictions of the overall model for such operating parameters as solid circulation flux, suspension temperature, length of the heat transfer surface, superficial gas velocity, and mean particle size are in good agreement with the published data for long surfaces.
- OSTI ID:
- 6974434
- Journal Information:
- AIChE Journal (American Institute of Chemical Engineers); (United States), Journal Name: AIChE Journal (American Institute of Chemical Engineers); (United States) Vol. 37:8; ISSN 0001-1541; ISSN AICEAC
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420400* -- Engineering-- Heat Transfer & Fluid Flow
661300 -- Other Aspects of Physical Science-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CALCULATION METHODS
CIRCULATING SYSTEMS
COLLOIDS
COOLING
DIMENSIONS
DISPERSIONS
EMULSIONS
ENERGY TRANSFER
FLUIDIZED BEDS
HEAT FLUX
HEAT TRANSFER
PARTICLE SIZE
RADIATIVE COOLING
SIZE
SOLIDS
TEMPERATURE RANGE
TEMPERATURE RANGE 0400-1000 K
THERMODYNAMICS
THICKNESS
WALLS