Radial Heat Transfer in Packed Beds of Shaped Particles
E. I. Smirnov1, A. V. Muzykantov1 , V. A. Kuzmin1, I. A. Zolotarskii1, G. W. Koning2 and A. E. Kronberg 2
1G. K. Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Pr. Akademika Lavrentyeva 5, Novosibirsk 630090 (Russia), E-mail: A. D. esmirnov@catalysis.nsk.su
2Faculty of Mechanical Engineering, Twente University of Technology, P.O. Box 217, 7500 AE Enschede (The Netherlands)
Abstract
Experimental data on the effective radial thermal conductivities and wall heat transfer coefficients of cylindrical beds formed of 4-hole and 52-hole cylindrical pellets, 6-spoke wheels and 3-hole trilobed particles are presented. A model with a linear variation of the radial thermal conductivity in the vicinity of the wall is proposed for description of the radial heat transfer in the packed bed. The model allows simple correlation between the wall Nusselt number and the bed core effective radial thermal conductivity. The model does not require any additional empirical parameters for the description of heat transfer in packed beds of different shaped particles.
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