Patent ID: 9027354
Filing Date: 2015-05-12
Classification: F02C,F05D

Abstract:
1. A method of operating a gas turbine system, comprising: compressing air within a compressor of the gas turbine system to produce pressurized air and bleed air, wherein a bleed outlet of the compressor discharges the bleed air; producing a first output with a turbine of the gas turbine system, wherein the first output drives the compressor; directing the bleed air to an inlet bleed circuit coupled to an inlet of the compressor, wherein the inlet bleed circuit comprises a first bleed path, a second bleed path, and a third bleed path configured to provide the bleed air from the bleed outlet to the first bleed path and the second bleed path, wherein the bleed air comprises a non-zero first portion provided to the first bleed path and a second portion provided to the second bleed path, and the second portion is the bleed air less the non-zero first portion; expanding the non-zero first portion within a turbo-expander connected in the first bleed path to produce a second output; combining a sub-portion of the non-zero first portion of the bleed air and the second portion of the bleed air to form a part of the bleed air between the turbo-expander and the inlet of the compressor; recirculating the part of the bleed air to the inlet of the compressor; and controlling the first output and the second output.