Control of gas turbine combustion temperature by compressor bleed air
AssigneeGeneral Electric Company
InventorsRichard Lee Nichols, Bruce G. Norman, Kevin Michael Elward, Roointon Erach Pavri, Benjamin Rush, Robert Edward Boettner, John P. VanDevelde
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Abstract
A method of operating a combustor in a gas turbine that receives combustion air from a compressor includes a) controlling combustion temperature as a function of compressor discharge air bled from the compressor by determining a minimum amount of compressor discharge air required for maintaining a predetermined minimum combustion temperature; and b) bleeding compressor discharge air in excess of the minimum amount from the compressor via a control valve.
Claims16
A method of operating a combustor in a gas turbine that receives combustion air from a compressor comprising:
- a) controlling combustion temperature as a function of compressor discharge air bled from the compressor by determining a minimum amount of compressor discharge air required for maintaining a predetermined combustion temperature;
- and
- b) bleeding compressor discharge air in excess of said minimum amount from said compressor via a control valve.
A method of operating a combustor in a gas turbine that receives combustion air from a compressor comprising:
- a) controlling combustion temperature as a function of compressor discharge air bled from the compressor by determining a minimum amount of compressor discharge air required for maintaining a predetermined minimum combustion temperature;
- and
- b) bleeding compressor discharge air in excess of said minimum from said compressor via a control valve;
- wherein step a) is carried out by using one or more process parameters to determine a bleed valve temperature reference and using that reference to determine required bleed flow, subject to overrides from other software modules acting through a minimum value selection function that compares multiple inputs, each based on one or more process parameters, and selecting that one of the multiple inputs that provides for the minimum amount of compressor discharge air as a control input to said control valve;
- and wherein step b) includes bleeding air from multiple extraction locations spaced circumferentially about said compressor.
Dependencies are inferred from the claim text.