5. Dynamic model for design and testing
0 5 10 15
Main steam mass flow
Δ 5 bar
Δ 10 bar
CFB boiler process model in
MATLAB Simulink
• A dynamic simulator is applied in testing
flexibility
• Process parameter studies
• Output constraints
• Process design improvement
6. Temperature change in the drum
Time [min]
0 5 10 15 20
[o
C]
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
7. • Coupled CFD-
Apros process
simulator
• Dynamic models
that can calculate
ramps
• Emissions,
controls, local
conditions inside
the boiler
Dynamic CFD modelling
Solids vertical velocity [m/s]
8. - Biomass CHP needs fuel, operational and solution
flexibility
- Biomass CHP is needed also 2050 in windy scenario
- Boiler design needs renewal
- Tools for testing new designs are now available
- Further development is needed
SUMMARY