Dynamic simulation assisted power-plant design

Power-plant design methods that are in use today too often presuppose that the steam consumption of an industrial host is completely steady throughout one day´s or one hour´s operation. The reality at many industrial processes such as pulp and paper mills couldn't be more different: steam load typically shifts all the time up and down when breaks on big paper machines and cyclical operation of batch digesters take place. Turbine and boiler trips can add their share in the operational challenges.

It is typical that steam-net controls are even today developed only during commissioning by trial and error. It often takes months to get the power plant running reliably and efficiently after the initial start-up.

In Pöyry's CHP plant engineering these disturbances are tested already in the early stages of the power-plant concept development with Modysim™, Pöyry's own steam-network simulator. With the simulation it can be ensured that

• process component dimensioning is correct
• possible steam accumulator is correctly dimensioned
• steam-pressure control configuration is correct, also in the turbine and boiler controls
• highest possible steam availability can be achieved
• CHP plant can be commissioned quickly without control related teething problems