Patent ID: 9273612
Filing Date: 2016-03-01
CPC Classification: F01N,F02C,F05D

Claim Text:
1. A method of operating a gas turbine engine, the method comprising: operating the gas turbine engine over a range of power output levels; controlling a mass flow of NOx produced in exhaust of the gas turbine engine to be within 10% of a selected NOx mass flow over the range of power output levels; and treating the exhaust of the gas turbine engine in a selective catalytic reduction process, wherein the method further comprises: operating the gas turbine engine over the range of power output levels in a load follow operation mode; controlling the mass flow of NOx produced to be higher than a minimum mass flow of NOx that could be produced over the range of power output levels, such that the mass flow of NOx is stable over the range of power output levels compared to the minimum mass flow of NOx over the range of power output levels; and treating the exhaust of the gas turbine engine in the selective catalytic reduction process with a stable amount of reducing agent proportionate to the stable mass flow of NOx produced over the range of power output levels.