Patent ID: 6354073
Filing Date: 2002-03-12
Classification: F01D,F01K,F02C,F05D,F23R,Y02E

Abstract:
A combined cycle power plant, which is structured so as to combine a gas turbine plant and a steam turbine plant, said combined cycle power plant comprising:an exhaust heat recovery boiler for generating a first steam which drives a steam turbine, of said steam turbine plant, by using an exhaust heat from a gas turbine, of said gas turbine plant; a steam cooling system for cooling a high temperature cooled part of said gas turbine, of said gas turbine plant, by a second steam and for recovering a superheated steam from said steam cooling system in said steam turbine, of said steam turbine plant; means for closing a steam entrance of said steam cooling system immediately after a stoppage of said gas turbine, of said gas turbine plant; means for discharging a residual steam to an atmosphere; means for supplying low humidity air; an air reservoir in which said air supplying means stores a part of a compressor emitted air during operation, said compressor emitted air being different from and independent of a gas turbine compressor air; and means for eliminating moisture from said compressor emitted air before storage.