Journal of Fundamentals of Renewable Energy and Applications
Open Access
ISSN: 2090-4541
ISSN: 2090-4541
Jaakko Saastamoinen
VTT Technical Research Centre of Finland,
Box 1603, 40101 Jyväskylä
Finland
Review Article
Release Profile of Volatiles in Fluidised Bed Combustion of Biomass
Author(s): Jaakko SaastamoinenJaakko Saastamoinen
A simplified model for the release profile of volatiles in fluidised and circulating fluidised beds is presented. The location of the release of volatiles in the furnace depends on the interplay of flow of fuel particles affecting their location and heating of fuel particles affecting rates of drying and pyrolysis and consequently the mass of fuel particles. The coupled equations describing heating, de-volatilization including drying, elutriation and movement of particles are solved to find the release profile. Large heavy particles remain in the dense bed whereas light particles are entrained by the gas and elutriated from the bed to the riser. The situation is dynamic, since fuel particles lose weight due to release of moisture and volatiles and decrease in size due to shrinkage affecting their movement and escape from the lower dense bed to the riser. The model is based on the foll.. View More»
DOI:
10.4172/2090-4541.1000148