Patent ID: 6301874
Filing Date: 2001-10-16
Classification: F01K,F02C,Y02E,Y02P

Abstract:
A combined cycle power plant having a gas turbine plant and a steam turbine plant combined together, the power plant comprising:an exhaust heat recovery boiler for generating steam for driving the steam turbine by using exhaust heat from the gas turbine; anda steam cooling system for cooling a target high-temperature portion in the gas turbine by using steam, where superheated steam from the steam cooling system is recovered and used in the steam turbine, andwherein the steam turbine plant comprises at least a high-pressure turbine and a low-pressure turbine, wherein an exhaust gas from the high-pressure turbine is introduced into the steam cooling system, and all the steam generated by the exhaust heat recovery boiler is directly supplied to the steam turbine plant.