METHOD FOR OPERATING A COMBINED CYCLE POWER PLANT

• Main Authors: BROESAMLE, STEFAN EDUARD, RUCHTI, CHRISTOPH
• Format: Patent
• Language: English; French
• Published: 02.08.2016
• Subjects: AIR INTAKES FOR JET-PROPULSION PLANTS; BLASTING; COMBUSTION ENGINES; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS; ENGINE PLANTS IN GENERAL; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES; GAS-TURBINE PLANTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INDEXING SCHEME FOR ASPECTS RELATING TONON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES ORJET-PROPULSION PLANTS; INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; STEAM ACCUMULATORS; STEAM ENGINE PLANTS; STEAM ENGINES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

In the case of a method for operating a combined cycle power plant (10), which has a gas turbine installation (11) and a water-steam cycle (21) which is connected to the gas turbine installation (11) by means of a waste heat steam generator (24) and has at least one steam turbine (23). The gas turbine installation (11) includes a compressor (13), a combustion chamber (14) and a turbine (16). To cool the turbine (16), air compressed at the compressor (13) is removed, is cooled in at least one cooler (18, 19) flowed through by water thus generating steam and is introduced into the turbine (16). At least with the gas turbine installation (11) running, prior to or during the start-up of the water-steam cycle (21), waste heat which is contained in the steam generated in the at least one cooler (18, 19), is used to good effect for pre-heating the installation inside the combined cycle power plant (10).