Heat transfer modelling of spherical particles subject to heating in a fluidized bed

This paper presents an analytical model for analyzing transient heat transfer between a brick particle and air flow during heating in a fluidized bed combustor. Both experimental and theoretical studies were carried out. The experimental investigation provided the temperature distributions at the ce...

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Bibliographic Details
Published in:International communications in heat and mass transfer 1996, Vol.23 (5), p.705-712
Main Authors: Dincer, I., Kilic, Y.A., Kahveci, N.
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fluidized bed combustors
Fluidized beds
Heat convection
Heat radiation
Heat transfer
Heat transfer coefficients
Heating
Mathematical models
Particles (particulate matter)
Surface phenomena
Temperature distribution
Theoretical studies. Data and constants. Metering
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Summary:This paper presents an analytical model for analyzing transient heat transfer between a brick particle and air flow during heating in a fluidized bed combustor. Both experimental and theoretical studies were carried out. The experimental investigation provided the temperature distributions at the centers of the spherical particles during heating. These data were presented in the dimensionless form and were compared with the results of the present analytical model. The theoretical investigation included two cases: e.g. Case 1 considered that the surface heat transfer coefficient is only the convection heat transfer coefficient; Case 2 also considered that the surface heat transfer coefficient is the sum of the convection and radiation heat transfer coefficients. Better agreement was found between the experimental data and the theoretical Case 2. The results of this study show that there is a dominant effect of the radiation heat transfer on the temperature distribution.
ISSN:0735-1933
1879-0178
DOI:10.1016/0735-1933(96)00053-X