In the present work the cluster energy balance approach is proposed to estimate the bed-to-wall heat transfer coefficient in a circulating fluidized bed combustor. Based on the cluster energy balance approach, the equations are formulated and are solved numerically using the boundary conditions. In one case cluster alone is considered and in another case cluster and dispersed phase together is considered in the energy balance and formulation of equations. The cluster heat transfer coefficient, the bed-to-wall heat transfer coefficient are estimated for the two cases with boundary conditions. The heat transfer coefficient depends on boundary conditions and suspension density. The results from the present work are also compared with the published experimental data. The present work provides additional information on the particle heat transfer mechanism.
展开▼
