The document discusses the need for flexibility in future multi-fuel combined heat and power (CHP) plants. It describes how dynamic modeling tools can be used to test flexibility through process parameter studies and evaluate design improvements. These tools include dynamic simulators and coupled computational fluid dynamics (CFD) and process models that can calculate ramps and local conditions inside boilers. Further development of these tools is needed to design multi-fuel CHP plants with the flexibility to meet future energy needs.

1. Flexibility of multi-fuel plants -
Needs, possibilities and
solutions
31.10.2016, Tero Joronen, Plant Solutions Manager

2. Drivers: Future multi-fuel CHP

3. Future multi-fuel CHP: Next level

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