A parametric study of radiative heat transfer in pulverised coal furnaces

The P-1 approximation and the Monte Carlo method are applied in cylindrical coal-fired furnaces. The absorption and scattering efficiencies and the ph ase function of coal, char and fly-ash particles are obtained from Lorenz-M ie theory and wavelength dependent optical properties based on measurements available in the literature. The influence of each kind of particle on the radiative heat transfer is investigated. Comparisons between the P-1 and t he Monte Carlo methods are performed for various particle size distribution s and mass concentrations. Isotropic and neglecting of scattering are evalu ated against anisotropic scattering as potential simplifications in enginee ring applications. (C) 2000 Elsevier Science Ltd. All rights reserved.