Patent ID: 6385961
Filing Date: 2002-05-14
Classification: F01D,F02C,F05D

Abstract:
A purging air supply system comprising:a first cooler that cools air from a rotor of a gas turbine, said first cooler comprising a first inlet and a first outlet, said first inlet being in communication with the rotor so as to receive air from the rotor, said first outlet being in communication with the rotor so as to outlet a first portion of cooled air to the rotor; a second cooler that further cools a second portion of the cooled air from said first cooler, said second cooler comprising a second inlet and a second outlet, said second inlet being in communication with said first outlet so as to receive the second portion of the cooled air from said first cooler; and a pressure elevation compressor that increases pressure of further cooled air from said second cooler, said pressure elevation compressor comprising a third inlet and a third outlet, said third inlet being in communication with said second outlet so as to receive the further cooled air from said second cooler, said third outlet being in communication with a fuel nozzle of the gas turbine so as to supply air at an increased pressure to the fuel nozzle.