Joint project for biomass. Phase 1: particle transport and deposit properties

When the particles leave the fuel bed, they are predominantly cylindrical in shape, and, during the transport to the top of the furnace, the combustion processes which were initiated at the fuel bed will be completed. The burnout state of a particle is important in order to determine the sticking propensity of the particle at impact. The project focuses on characterizing the aerodynamics of such particles, in order to be able to predict the impact location and impact state of these particles for deposit build-up studies. A second factor affecting the sticking propensity is the state of the already formed deposit surface and its temperature at the impact location. These are also directly linked to the rate of heat transfer through the heat transfer surfaces, and the local wall conditions are thus essential operating parameters, as they govern the local rate of deposit growth. An improved understanding of the thermal properties of deposits is an outcome of this project, in order to quantify the influence of local deposit properties on thermal loading and stationary heat flux