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Modeling of grid region heat transfer in a shallow gas‐solid fluidized bed
Author(s) -
Wang RongChi,
Cho WeiChang,
Ho T. C.
Publication year - 1995
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450730107
Subject(s) - fluidized bed , distributor , heat transfer , materials science , tube (container) , mechanics , fluidization , particle (ecology) , jet (fluid) , thermodynamics , composite material , geology , physics , oceanography
Heat transfer coefficients between the bed and an immersed horizontal tube in the grid‐region of a shallow gas‐solid fluidized bed were experimentally and theoretically studied. Experiments were carried out in two fluidized bed columns with inside diameters of 88 and 137 mm, respectively. The fluidized particles tested were sand, limestone and glass beads. Experimental parameters also included particle size, superficial gas velocity, tube diameter, tube location and distributor design. A mechanistic model considering the contributions of jet phase, emulsion phase and dead phase was derived for estimating the grid‐region heat transfer coefficients. Most of the model predictions were found to be within 25% of the experimentally observed data.