Patent ID: 6666028
Filing Date: 2003-12-23
Classification: F01K,F02C,F05D

Abstract:
An operation method for a combined plant comprising a gas turbine plant and a steam turbine plant, said steam turbine plant comprising:a steam drum for generating steam and supplying the steam into a steam turbine, a condenser for condensing steam passing through said steam turbine, a steam turbine bypass line for connecting the upstream of said steam turbine and said condenser and bypassing said steam turbine; and a gas turbine steam cooling portion for cooling a hot portion of said gas turbine plant by steam supplied from said steam drum, and which is provided parallel to a pipe connecting the upstream of said steam turbine bypass line and said steam drum, wherein when said combined plant is in a normal operation mode, an amount of steam passing through said gas turbine steam cooling portion is adjusted by a valve which is provided in said steam turbine bypass line.