Publication:
Modeling the motion of fuel particles in a fluidized bed

Loading...
Thumbnail Image
Identifiers
Publication date
2021-12-01
Defense date
Advisors
Tutors
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier Ltd.
Impact
Google Scholar
Export
Research Projects
Organizational Units
Journal Issue
Abstract
A semiempirical model for the mixing of fuel particles in a fluidized bed is presented and validated against experimental data from the literature regarding lateral fuel mixing. The model of fuel particle mixing categorizes the fluidized bed into three mixing zones: a rising bubble wake solid zone, an emulsion zone with sinking bulk solids, and a splash zone located above the dense bed. In the emulsion zone, the axial motion of the fuel particle is described by a force balance, applying a viscoplastic stress model, i.e., with a dominant yield stress and only a minor contribution of the shear stress, using an empirical expression from the literature. In the lateral direction, the model is divided into so-called 'recirculation cells', which are crucial for the lateral mixing. Comparisons of the modeled and measured lateral dispersion coefficients of different fuel types measured in three different large-scale fluidized bed units under both hot and cold conditions (...)
Description
Keywords
Fluidized bed, Modeling, Fuel mixing, Lateral dispersion, Biomass
Bibliographic citation
Köhler, A., et al. Modeling the motion of fuel particles in a fluidized bed. In: Fuel 305 (2021) 121424, 12 p.