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  4. Description of the temperature, humidity and concentration distribution in gas-liquid-solid fluidised beds
 
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Description of the temperature, humidity and concentration distribution in gas-liquid-solid fluidised beds

Publikationstyp
Journal Article
Date Issued
1999
Sprache
English
Author(s)
Heinrich, Stefan  
Mörl, Lothar  
TORE-URI
http://hdl.handle.net/11420/14303
Journal
International journal of thermal sciences  
Volume
38
Issue
2
Start Page
142
End Page
147
Citation
International Journal of Thermal Sciences 38 (2): 142-147 (1999)
Publisher DOI
10.1016/S1290-0729(99)80051-9
Scopus ID
2-s2.0-2042463899
This work presents physically based mathematical mass- and heat transfer models for processes of granulation, agglomeration and coating in fluidised beds. Starting from mass and energy balances, the models describe the influences of local liquid input, non-ideal solid and liquid mixing, heat transport by the solids, and a place-dependent degree of wetness. A coefficient for the heat or mass transfer solid-liquid film, solid-gas and gas-liquid films was defined. The place-dependent functions of gas and solid temperatures, gas humidity, gas enthalpy, liquid concentration, as well as the degree-of-wetness, are presented. The main conclusions of the model are the existence of an active zone in the liquid feed and, furthermore, of a central region in the fluidised bed, characterised by constant gas temperatures.
Subjects
Drying
Evaporation
Fluidised bed
Heat and mass transfer
Spraying
DDC Class
620: Ingenieurwissenschaften
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