GAS TURBINE FOR COMBINED CYCLE POWER PLANT

摘要

In a gas turbine for a combined-cycle power plant wherein steam for cooling is generated in an exhaust-heat recovery boiler to which exhaust gas of a gas turbine is supplied, and stationary blades are cooled by the steam for cooling, a cooli ng- steam system is provided by connecting a cooling-steam supply pipe from an exhaust - heat recovery boiler to a cooling path formed in a first-stage stationary blade, providing a cooling-steam recovery pipe connecting the steam turbine to the cooling path formed in a second-stage stationary blade, and providing a connecting pipe for cooling- steam which has a relatively large cross-sectional area and connects the cooling paths i n the first-stage and second-stage stationary blades.