Abstract:
A two-dimensional steady state packed bed CFD model is developed for the combustion
of wood chip in a moving grate.The model is validated using an industrial moving
bed hot air generator used in Tea industry.Various empirical models have used for thermophysical
property modeling.For this purpose free-board region of the hot air generator
is also simulated including volatile reactions and turbulent combustion.Modeling
and simulation carried out using open source CFD software OpenFOAM.Radiation
heat incident on the packed bed is unknown and it is assumed in the first packed bed
simulation.Therefore, CFD simulation involves number of iterative runs of the packed
bed model and free board model to obtain the radiation temperature incident on packed
bed due to free board heat.According to the validation results the developed packed bed
model can be used to predict temperature of the packed bed wood chip combustion of
thermally thin wood particles. The gas compositions could not be validated using the
model.Further improvements to the model have suggested.
