Computational fluid dynamics modeling of rice husk combustion in a fluidised bed combustor

M. Rozainee, S. P. Ngo, Arshad A. Salema, K. G. Tan

Research output: Contribution to journalArticleResearchpeer-review

20 Citations (Scopus)

Abstract

Computational fluid dynamics (CFD) modeling was carried out to determine the trajectories and residence time of burning rice husk particles in the fluidised bed combustor (FBC) at different secondary air flowrates. In FBC, the intra and extra-particle mass transfer resistance of the oxidising agent plays a major role in determining the combustion rate because of high temperature processing. Moreover, factors such as turbulence and retention time determine the reaction rate. In actual combustion experiments, these two factors could not be observed or determined distinctly, thereby hindering any further improvements in operating parameters or combustor design in order to maximise the efficiency of particle combustion. This hitch was solved through the application of (CFD) modeling. The modeling results offered significant insights into the trajectory and mass loss history of the rice husk particle combustion. The actual experimental results also showed agreement with the modeling results.

Original languageEnglish
Pages (from-to)331-347
Number of pages17
JournalPowder Technology
Volume203
Issue number2
DOIs
Publication statusPublished - Nov 2010
Externally publishedYes

Keywords

  • Combustion
  • Computational fluid dynamics
  • Fluidised bed
  • Particle burnout
  • Retention time
  • Rice husk

Cite this