Heat transfer during forest biomass particles drying in an agitated fluidised bed

The phenomenon of convective heat transfer between gas and biomass particles during the drying process of fluidised bed material was analysed in order to obtain the heat transfer coefficients between the gas and the particle surface. In order to promote high homogeneity of the particles suspension,...

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Bibliographic Details
Published in:Biosystems engineering 2016-11, Vol.151, p.65-71
Main Authors: Moreno, Rogelio M., Antolín, Gregorio, Reyes, Alejandro E.
Format: Article
Language:English
Subjects:
Biomass
Deviation
Drying
Fluid dynamics
Fluid flow
Fluidised bed
Forestry biomass
Forests
Gas–solid fluidised bed
Gas–solid heat transfer
Heat transfer
Heat transfer coefficients
Homogeneity
Particles drying
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Summary:The phenomenon of convective heat transfer between gas and biomass particles during the drying process of fluidised bed material was analysed in order to obtain the heat transfer coefficients between the gas and the particle surface. In order to promote high homogeneity of the particles suspension, the bed was mechanically stirred, to obtain a uniform temperature inside the bed. The results showed a correlation between, the Nusselt and Reynolds numbers, which predicts the surface heat transfer coefficient with a deviation of ±15%, in relation to the experimental data. •Gas and biomass particle convective heat transfer in fluidised bed analysed.•Fluidised bed mechanically stirred.•Rotation speed no influence on heat transfer coefficient.•Convective heat transfer during the period of constant drying rate.•±15% error comparing measurements with Nusselt/Reynolds number correlation.
ISSN:1537-5110
1537-5129
DOI:10.1016/j.biosystemseng.2016.08.002