US 9,810,428 B2
Method for adjusting a natural gas temperature for a fuel supply line of a gas turbine engine
Klaus Knapp, Gebenstorf (CH); Peter Marx, Birmenstorf (CH); Karl Reyser, Küssaberg (CH); and Maria-Belen Gasser-Pagani, Baden (CH)
Assigned to ANSALDO ENERGIA IP UK LIMITED, London (GB)
Filed by ANSALDO ENERGIA IP UK LIMITED, London (GB)
Filed on May 26, 2017, as Appl. No. 15/606,620.
Application 15/606,620 is a division of application No. 14/189,206, filed on Feb. 25, 2014, granted, now 9,677,764.
Claims priority of application No. 13156508 (EP), filed on Feb. 25, 2013.
Prior Publication US 2017/0261207 A1, Sep. 14, 2017
This patent is subject to a terminal disclaimer.
Int. Cl. F02C 9/00 (2006.01); F02C 9/40 (2006.01); F23N 1/00 (2006.01); F02C 7/224 (2006.01)
CPC F23N 1/002 (2013.01) [F02C 7/224 (2013.01); F02C 9/00 (2013.01); F02C 9/40 (2013.01); F05D 2260/80 (2013.01); Y02E 20/16 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for adjusting a natural gas temperature for a fuel supply line of a gas turbine engine including a heat exchanger on the fuel supply line, the method comprising:
measuring, by infrared analysis via a sensor, the natural gas percentage content of methane (CH4), ethane (C2H6), propane (C3H8), butane (C4H10), carbon dioxide (CO2);
calculating, via a controller, the nitrogen (N2) percentage content as the complement to 100 of the measured percentage content of methane (CH4), ethane (C2H6), propane (C3H8), butane (C4H10), carbon dioxide (CO2), and an index indicative of the natural gas energy content based on the measured and calculated percentage content of the natural gas; and
driving actuators for the heat exchanger to adjust the natural gas temperature on the basis of the index.