A One-Dimensional Transient Fuel Conversion Model for Grate Combustion Optimisation

J Martinez-Garcia & T. Nussbaumer
A one dimensional transient model for simulating the conversion of solid biomass fuel in grate boilers is presented. The model considers drying, pyrolysis, and char oxidation, gas flow through the pore space of the bed, conductive, convective and radiative heat transfer, and reduction of the bed volume. It allows to study the influence of fuel properties (moisture, ash, composition, particle size, bed porosity, solid density) and operating parameters (excess air ratio, temperature). The applicability of...