5. Gas-steam combined cycle with parallel arrangement
5.1 Principle
PPCC involves using two independent sources of thermal power for the steam turbine. The main source is usually a conventional steam boiler, and the second is a recovery boiler using exhaust fumes from a gas turbine. One difference with the CCFF is that the existing steam boiler undergoes no fundamental modification.
One or more TG+CR units can be arranged in parallel with the original system in two different ways :
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Gas-steam combined cycle with parallel arrangement
Case study: 100 MW unit
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