Siemens Energy Global Gmbh & Co. Kg

Christian Keune

Kok-Mun Tham

Nicolas Benjamin Wappler

Detlef Bock

A method for flushing a heat recovery steam generator in a power plant having a gas turbine, having a compressor, a combustion chamber and a turbine with a rotor, and having a generator coupled to the gas turbine and a start-up converter to convert from an alternating current of random frequency into an alternating current of a specified frequency. The start-up converter is connected to an output of the generator at which the alternating current of random frequency is applied. Wherein, when the gas turbine is run down, the rotor is cushioned with the help of the start-up converter at a boiler flushing speed and the heat recovery steam generator is further flushed until the specifications for flushing the waste heat steam generator are complied with.

Boiler flushing

The invention relates to a method for starting up a gas turbine engine of a combined cycle power plant. The method includes applying load to the gas turbine engine and increasing the load until a predetermined combustor firing temperature is reached, while keeping the adjustable inlet guide vanes in a start position adapted to reduce the mass flow of air into the compressor; further increasing the load of the gas turbine engine while opening the adjustable inlet guide vanes and keeping the predetermined combustor firing temperature constant until the inlet guide vanes reach an end position adapted to increase the mass flow of air into the compressor; further increasing the load of the gas turbine engine while keeping the adjustable inlet guide vanes in the end position until a predetermined load of the gas turbine engine is reached.

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Heiligenhaus, Germany

Christian Keune