Model for drying during fluidized-bed combustion of wet low-rank coals
Pradeep, K. Agarwal; William, E. Genetti; Yam Yee Lee; Shyam, N. Prasad
Fuel 63(7): 1020-1027
An unsteady state heat conduction model with a convective boundary condition is proposed for the drying of low-rank, high-porosity coals, such as lignites, during fluidized-bed combustion. The drying front is assumed to be the receding surface of a wet core. The solution technique for this moving boundary problem is based on the heat balance integral approach with immobilization of the moving boundary by a change in space variable.