RADIATIVE HEAT-TRANSFER MODEL INT HE INTERIOR OF A PULVERIZED COAL FURNACE

A practical mathematical model simulating radiative heat transfer in the furnace of a pulverized coal boiler is presented. The model is based on an adaptation of the zone method, and it has been originally developed as an essential part of an overall pulverized coal combustion model. The model includes calculation of the internal exchanges between coal particles and also the exchanges between the two phases, gas and solid particles, and furnace walls, for which the gas-phase participating character is taken into account. The inclusion of this model in a pulverized coal combustion model allows for testing its validity and its sensitivity to furnace walls and particle emissivity values, by comparison with measurements in a 550-MW power plant boiler. © 1990, American Chemical Society. All rights reserved.