This study presents a comprehensive dynamic process simulation model of a
1 MWth circulating fluidized bed test facility applied for lignite and refusederived
fuel co-combustion. The developed dynamic process simulation model
describes the circulating fluidized bed riser and the supplying system with a high
level of detail considering heat transfer, gas-solid interaction, combustion, and
fluid dynamics. The model was first tuned at two steady-state operation points
and was then validated by the measured data from a long-term test campaign of
the 1 MWth circulating fluidized bed test facility at various loads (60%–80% to
100%). During the load changes, the simulated pressure and temperature
profiles along the combustor as well as the flue gas concentrations agree
very well with the measurement data. Finally, increasing the proportion of
waste-derived fuel in the co-combustion process was investigated to evaluate
the flexibility of its use in power generation to further reduce CO2 emissions.