Patent ID: 6519945
Filing Date: 2003-02-18
Classification: F02C,Y02E

Abstract:
A method for controlling nitrogen supplied to combustion section of a gas turbine in an integrated gasification, combined cycle system (IGCC) having a gasification system providing gasified fuel to the combustion section of the gas turbine, the method comprising the steps of:a. compressing nitrogen gas in a nitrogen compressor having an input coupled to a nitrogen gas output of the gasification system and an output coupled to a nitrogen injection system, wherein said compressor supplies nitrogen at an output pressure from the output of the compressor; b. injecting compressed nitrogen into the combustion section from the injection system, wherein the nitrogen is injected a pressure substantially the same pressure as the output of the nitrogen compressor, and c. controlling the nitrogen compressor to produce a nitrogen output that corresponds to a nitrogen flow rate setpoint.