Influence of particle rotation and partial irradiation on the particle heating up process

Abstract

Particle heat transfer is important for the particle heating and combustion in solid fuels combustion reactors. A 3D particle conduction model is developed to investigate the mutual interactions of the partial surface irradiation and rotation speed on the particle heat transfer. The effects of particle diameter, thermal conductivity and particle shape are investigated. The lumped parameter (0D) model is also validated to determine its accuracy. Particle temperature contours, maximum, minimum and average temperatures are presented and analyzed in detail. Partial surface irradiation leads to non-uniform temperature distribution within the particle, especially for larger particles, while particle rotation tends to decrease the non-uniformity.