Patent ID: 9677764
Date: 2017-06-13
CPC Classifications: F02C,F05D,F23N,Y02E

Claim:
1. A gas turbine engine comprising: a compressor, a combustion chamber and a turbine, the combustion chamber having a fuel supply line with a heat exchanger for adjusting a natural gas temperature, the gas turbine engine including: at least a sensor for measuring by infrared analysis a natural gas percentage content of methane (CH4), ethane (C2H6), propane (C3H8), butane (C4H10), carbon dioxide (CO2), and a controller configured for calculating a percentage content of nitrogen (N2) as a complement to 100 of the measured percentage content of methane (CH4), ethane (C2H6), propane (C3H8), butane (C4H10), carbon dioxide (CO2), the controller being configured for further calculating an index indicative of a natural gas energy content based on the measured and calculated percentage content of the natural gas and for driving actuators for the heat exchanger to adjust the natural gas temperature on the basis of the index.