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TECHNICAL PAPERS

Analysis of the Heat Transfer Mechanism in High-Temperature Circulating Fluidized Beds by a Numerical Model

[+] Author and Article Information
Qiao He, Franz Winter

Institute of Chemical Engineering, Fuel and Environmental Technology, Vienna University of Technology, A-1060, Vienna, Austria  

Ji-Dong Lu

National Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, 430074 P.R. China

J. Energy Resour. Technol 124(1), 34-39 (Mar 25, 2002) (6 pages) doi:10.1115/1.1446473 History: Received November 03, 2000; Revised November 30, 2001; Online March 25, 2002
Copyright © 2002 by ASME
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References

Grace, J. R., 1986, “Heat Transfer in Circulating Fluidized Bed,” Circulating Fluidized Bed Technology, ed., P. Basu, Pergamon Press, pp. 63–82.
Basu,  P., Nag,  P. K., Chen,  B. H., and Shao,  M., 1987, “Effect of Operating Variables on Bed to Wall Heat Transfer in a Circulating Fluidized Bed,” Chem. Eng. Commun., 61, pp. 227–237.
Martin,  H., 1984, “Heat Transfer between Gas Fluidized Beds of Solid Particles and the Surfaces of Immersed Heat Exchanger Elements,” Chem. Eng. Process., 18, pp. 157–169.
Glicksman, L. R., 1988, “Circulating Fluidized Bed Heat Transfer,” Circulating Fluidized Bed Technology II, eds., P. Basu and J. F. Large, Pergamon Press, pp. 13–29.
Chen,  C. C., and Chen,  C. L., 1992, “Experimental Study on the Bed-to-Wall Heat Transfer in a Circulating Fluidized Bed,” Chem. Eng. Sci., 47, No. 5, pp. 1017–1025.
Basu, P., and Konuche, F., 1988, “Radiative Heat Transfer from a Fast Fluidized Bed,” Circulating Fluidized Bed Technology II, eds., P. Basu and J. F. Large, Pergamon Press, Oxford, pp. 245–254.
Basu,  P., 1990, “Heat Transfer in Fast Fluidized Bed Combustors,” Chem. Eng. Sci., 45, No. 10, pp. 3123–3136.
Chen, J. C., Cimini, R. J., and Dou, S. S., 1988, “A Theoretical Model for Simultaneous Convective and Radiative Heat Transfer in Circulating Fluidized Bed,” Circulating Fluidized Technology II, eds., P. Basu and J. F. Large, Pergamon Press, Oxford, pp. 255–262.
Leckner, B., 1991, “Heat Transfer in Circulating Fluidized Bed Boilers,” Circulating Fluidized Bed Technology III, eds., P. Basu and M. Horio, Pergamon Press, Oxford, pp. 27–38.
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Qi, C., and Farag, I. H., 1993, “Heat Transfer Mechanism due to Particle Convention in Circulating Fluidized Bed,” preprint volume, 4th International Conference on CFB, USA, pp. 396–401.
Zehner,  P., and Schlunder,  E. U., 1970, “Warmeleitfahigkeit von Schuttungen bei massigen Temperaturen,” Chem.-Ing.-Tech., 42, pp. 933–941.
Hunt,  M. L., and Tien,  C. L., 1988, “Non-Darcian Convection in Cylindrical Packed Beds,” ASME J. Heat Transfer, 110, pp. 378–384.
Chandrasekhar, S., 1960 Radiative Transfer. Dover. New York, NY.
Flamant, G., 1985, “Transfert de chaleur couplés dans les lits fluidisés à haut température. Application à la conversion thermique de l’ènergie solaire,” thèse de docteur Es-Science, No. 93, Institut National Polytechnique de Toulouse, Mar 4.

Figures

Grahic Jump Location
The contributions of the heat transfer components to the total heat transfer coefficient
Grahic Jump Location
Predicted heat transfer coefficients for two average particle diameters
Grahic Jump Location
The influence of the thermal capacity of the particle on the total heat transfer coefficient
Grahic Jump Location
Predicted heat transfer coefficient for three particle densities
Grahic Jump Location
Predicted heat transfer coefficients for three superficial gas velocities
Grahic Jump Location
Predicted heat transfer coefficients for three furnace temperatures
Grahic Jump Location
Predicted heat transfer coefficients for three wall temperatures

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