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Heat transfer to a moving packed bed of nickel pellets

✍ Scribed by M. H. I. Baird; N. V. Rama Rao; E. Tackie; A. Vahed

Publisher: John Wiley and Sons
Year: 2008
Tongue: English
Weight: 198 KB
Volume: 86
Category: Article
ISSN: 0008-4034
DOI: 10.1002/cjce.20023

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✦ Synopsis

Abstract

Heat transfer between a bed of nickel pellets and a vertical section of electrically heated steel pipe has been measured, with the pellet bed inside the vertical pipe. Most of the data are for a 20.27 cm diameter pipe but some data were also obtained for a 10.23 cm diameter pipe. The effective thermal conductivity of the stationary pellet bed has been estimated approximately from the results of unsteady heating tests. Tests have been carried out with a downwardly moving bed, including the effect of air flowing upwards through the bed. Average values of the pellet‐side heat transfer coefficient are between 72 and 135 W/(m^2^°C) depending on the mass fluxes of air and pellets, and have been expressed as an empirical correlation.

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