Title:
Towards Digital Biomass Spreader Stoker Boilers: a Detailed, Particle-Based Model of Bed Combustion Coupled with CFD
Author(s):
Montañés, C., Cámara, M., Gómez, A., Gimeno-Escobedo, E., Liao, Y.-C., Milla, J. , Fueyo, N.
Document(s):
Paper
Poster
Abstract:
Predicting accurately the conditions within biomass boilers is challenging. It encompasses a wide range of spatial scales (from particles, millimeter to grate boiler, meters) and physical processes such as multiphasic flow, heat transfer, radiation, chemical reaction or particle accumulation in the bed. The fuel feeds is very heterogeneous: biomass particles may have variable composition, sizes or shapes. Furthermore, the biomass boiler operation is determined by operation parameters of the boiler (biomass feedstock, air distribution, grate speed), fuel characteristics (sizes, shapes, composition) and the different domains of the boiler (grate and freeboard), which are strongly coupled between them. We have successfully developed a CFD model able to simulate in detail these phenomena with low computational cost. To do it, we have implemented an innovative approach consisting in the combination of Eulerian discretization with Lagrangian features such as particle tracking with clustering. The model elaborated has been successfully tested through the simulation of the operation of a spreader-stoker biomass boiler, considering different biomass feedstock compositions.
Keywords:
biomass, boiler, combustion, modelling, biopower
Topic:
Biomass Conversion for Bioenergy
Subtopic:
Biomass Combustion in Large Utilities
Event:
29th European Biomass Conference and Exhibition
Session:
2CV.9.7
Pages:
652 - 656
ISBN:
978-88-89407-21-9
Paper DOI:
10.5071/29thEUBCE2021-2CV.9.7
Price:
FREE
