Influence of tube and particle diameter on heat transport in packed beds

Journal Article · Fri May 01 04:00:00 EDT 1992 · AIChE Journal (American Institute of Chemical Engineers); (United States)

DOI:https://doi.org/10.1002/aic.690380507· OSTI ID:6974419

Borkink, J G.H.; Westerterp, K R ^[1]

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1. Chemical Reaction Engineering Lab., Dept. of Chemical Engineering, Twente Univ. of Technology, 7500 AE Enschede (Netherlands)

In this paper, influence of the tube and particle diameter and shape, as well as their ratio, on the radial heat transport in packed beds is studied. Heat transport experiments were performed with four different packings in three wall-cooled tubes, which differed in inner diameter only. Experimental values for the effective radial heat conductivity and wall heat-transfer coefficient for the pseudo-homogeneous two-dimensional model and the overall heat-transfer coefficient for the one-dimensional model are presented. Values were obtained for glass spheres, alumina cylinders, and alumina Raschig rings. The effective radial heat conductivity and wall heat-transfer coefficient can both be correlated as a linear function of the gas flow rate. The Bodenstein number for heat at fully developed turbulent flow is influenced strongly by the shape of the packing: 10.9 for glass spheres, 7.6 for alumina cylinders, and 4.2 for alumina Raschig rings.

• OSTI ID: 6974419
• Journal Information: AIChE Journal (American Institute of Chemical Engineers); (United States), Journal Name: AIChE Journal (American Institute of Chemical Engineers); (United States) Vol. 38:5; ISSN 0001-1541; ISSN AICEAC
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
661300 -- Other Aspects of Physical Science-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DATA
DESIGN
DIMENSIONS
ENERGY TRANSFER
EXPERIMENTAL DATA
FLUID FLOW
GLASS
HEAT TRANSFER
INFORMATION
NUMERICAL DATA
ONE-DIMENSIONAL CALCULATIONS
PACKED BEDS
REACTIVITY COEFFICIENTS
SHAPE
SPHERES
TEMPERATURE COEFFICIENT
THERMODYNAMICS
TUBES
TURBULENT FLOW
TWO-DIMENSIONAL CALCULATIONS