Power plants – Combustion products used as motive fluid – Process
Reexamination Certificate
2007-08-28
2007-08-28
Casaregola, L. J. (Department: 3746)
Power plants
Combustion products used as motive fluid
Process
C060S803000
Reexamination Certificate
active
11670542
ABSTRACT:
The gas turbines of the present invention have multiple combustion chambers, and within each chamber are multiple fuel nozzles. Each nozzle has its own fuel control valve to control the fuel flowing to the nozzles. To minimize the pressure drop through the fuel control valves, multiple manifolds are employed. Each manifold supplies at least one fuel nozzle in multiple combustion chambers with fuel. The fuel control valves are mounted on the manifolds such that the weight of the fuel control valves and nozzles are carried by the manifolds, not the multiple combustion chambers. A plurality of thermocouples for measuring exhaust gas from said multiple combustion chambers are employed to sense gas exhaust temperature. In carrying out the methods of the present invention for tuning a gas turbine, it is essential to note that the most efficient gas turbine is one which has the least nitrous oxides, the least amount of unburned hydrocarbons, and the least amount of carbon monoxide for a specified energy output. In order to tune the gas turbine to accomplish these objectives, it is desirable that each combustion chamber in the gas turbine be well balanced relative to the remaining combustion chambers. It is an aim of the present invention to tune each of the multiple combustion chambers such that no specific combustion chamber is rich or lean, and all are operating within about 1% of the remaining combustion chambers.
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PCT Search Report dated Jul. 5, 2005.
Ali Mohamed Ahmed
Kothnur Vasanth Srinivasa
Roberts Matthew Eugene
Vandale Daniel Doyle
Brueske Curtis B.
Casaregola L. J.
General Electric Company
Patnode Patrick K.
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