Patent ID: 6038851
Filing Date: 2000-03-21
Classification: F01K,F02C,Y02E

Abstract:
An exhaust re-combustion type combined cycle power generation plant comprising:a gas turbine plant having a high temperature section;a boiler operatively connected to the gas turbine plant, in which an exhaust gas from the gas turbine plant is heated;a steam turbine plant operatively connected to the boiler and including high, intermediate and low pressure turbines, the steam turbine plant further being provided with a condensate and feed water system and a low temperature reheat system, in which the heated exhaust gas from the boiler is supplied to the condensate and feed water system as a heat source;a cooling steam supply system connected to the low temperature reheat system of the steam turbine plant and adapted to supply a cooling steam to the high temperature section of the gas turbine plant; anda cooling steam recovery system connected to the high temperature section of the gas turbine plant forrecovering the cooling steam after cooling the high temperature section to an intermediate stage of the intermediate turbine of the steam turbine plant.