Patent ID: 8616005

Claim:
A method of improving emissions from a gas turbine engine wherein: said gas turbine engine is a unitary structure comprising an engine housing having (1) an air intake section of said engine housing in which an engine compressor is positioned for receiving and compressing an intake air stream, (2) an internal combustion section which produces an engine exhaust stream comprising products of combustion; and (3) an engine power turbine within said engine housing through which said engine exhaust stream flows and expands; said gas turbine engine is operated at a geographical site having atmospheric air at an actual ambient air pressure and an actual ambient air temperature external to said gas turbine engine; said method comprises the step of (a) automatically monitoring a parameter which has a direct or indirect relationship to an amount of an emission in said engine exhaust stream; and said method further comprises the step of (b) automatically controlling a density of said intake air stream, prior to said intake air stream entering said air intake section of said gas turbine engine, based upon said parameter monitored in step (a) such that said amount of said emission in said engine exhaust stream does not exceed a predetermined level, wherein said intake air stream is a stream of said atmospheric air and said density of said intake air stream is automatically controlled in step (b) by changing a pressure of said intake air stream, said density of said intake air stream is automatically controlled in step (b) at least in part by automatically controlling an air pressurizing device for pressurizing said intake air stream, and said air pressurizing device is a centrifugal fan.