Directional Spectral Emittance of a Packed Bed: Correlation Between Theoretical Prediction And Experimental Data

摘要

Directional spectral emittance of an absorbing and scattering isothermal system of packed spheres is predicted by a radiative model based on the discrete ordinates method. Radative properties for the bed of packed opaque spheres are obtained using geometric Optics laws corrected with a scaling factor to take into account the dependent scattering. This model requires the knowledge of several parameters. Particle diameter and porosity Can be easily obtained, but particle hemispherical spectral reflectivity is very difficult to Obtain a priori.