Title:
Novel Packed-bed CFD Model for Pellet Combustion: Validation and Application to a Stove
Author(s):
Blank, M., Obernberger, I.
Document(s):
Paper
Slide presentation
Abstract:
An advanced CFD (computational fluid dynamics) model has been developed to describe the combustion of wood pellets. It is based on a packed-bed approach and provides a realistic description of the combustion of pellets, resolved in 3D over the whole fuel bed. It considers the properties of the packed bed rather than the properties of the single fuel particles. Compared to a particle-based description, this allows for much shorter simulation times, due to the reduced complexity. In the model, the local conditions in different parts of the fuel bed (temperatures, flow conditions, oxygen concentrations …) influence the various stages of the combustion process (drying, pyrolysis, charcoal gasification and combustion). The compaction of the fuel bed due to shrinkage of the fuel particles during conversion as well as the loss of the particle structure shortly before the conversion is complete are also included in the description. The model has been validated against measurement data from a lab-scale batch reactor, and then applied to simulate the fuel bed of a commercial pellet stove. The simulation results are in good agreement with the corresponding measurements.
Keywords:
biomass, combustion, modelling, wood pellet, computational fluid dynamics (CFD)
Topic:
Biomass Conversion for Bioenergy
Subtopic:
Advanced biomass combustion
Event:
31st European Biomass Conference and Exhibition
Session:
4CO.9.3
Pages:
641 - 647
ISBN:
978-88-89407-23-3
Paper DOI:
10.5071/31stEUBCE2023-4CO.9.3
Price:
FREE
