HIGH PRESSURE RATIO TWIN SPOOL INDUSTRIAL GAS TURBINE ENGINE
4 Assignments
0 Petitions
Accused Products
Abstract
An industrial gas turbine engine for electrical power production includes a high pressure spool and a low pressure spool in which the low pressure spool can be operated from full power mode to zero power mode when completely shut off, where the low pressure spool is operated at high electrical demand to supply compressed air to the high pressure compressor of the high pressure spool, and where turbine exhaust is used to drive a second electric generator from steam produced in a heat recovery steam generator. The power plant can operate at 25% of peak load while keeping the unused parts of the power plant hot for easy restart when high power output is required.
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Citations
41 Claims
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1-16. -16. (canceled)
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17. An industrial gas turbine engine for electrical power production, the industrial gas turbine engine comprising:
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a high pressure spool with a high pressure compressor driven by a high pressure turbine; a combustor operable between the high pressure compressor and the high pressure turbine; an electric generator directly coupled to the high pressure spool in synchronous operation with a local area power grid; a low pressure spool with a low pressure compressor driven by a low pressure turbine, the high pressure spool and the low pressure spool being rotatably independent, the low pressure compressor being connected to the high pressure compressor to supply compressed air from the low pressure compressor to the high pressure compressor; a first row of variable inlet guide vanes on the high pressure compressor; a second row of variable inlet guide vanes on the low pressure turbine; and a third row of variable inlet guide vanes on the low pressure compressor. - View Dependent Claims (18, 19, 20, 21, 22, 35, 36)
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23. An industrial gas turbine engine for electrical power production, the industrial gas turbine engine comprising:
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a high pressure spool with a high pressure compressor driven by a high pressure turbine; a combustor operable between the high pressure compressor and the high pressure turbine; an electric generator directly coupled to the high pressure spool in synchronous operation with a local area power grid; a low pressure spool with a low pressure compressor driven by a low pressure turbine, the high pressure spool and the low pressure spool being rotatably independent, the low pressure compressor being connected to the high pressure compressor to supply compressed air to the high pressure compressor; a row of variable inlet guide vanes on the low pressure turbine; and an intercooler to cool the compressed air from the low pressure compressor. - View Dependent Claims (24, 25, 26, 27, 28)
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29. An industrial gas turbine engine for electrical power production, the industrial gas turbine engine comprising:
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a high pressure spool with a high pressure compressor driven by a high pressure turbine; an intermediate pressure turbine connected immediately downstream from the high pressure turbine and connected to a synchronous operating electric generator by an intermediate rotor shaft; a low pressure spool with a low pressure compressor driven by a low pressure turbine, the low pressure turbine being driven by exhaust from the intermediate pressure turbine, the high pressure spool and the low pressure spool being rotatably independent, and the intermediate rotor shaft being concentric to and rotating within the low pressure spool; an outlet of the low pressure compressor connected to an inlet of the high pressure compressor to supply compressed air to the high pressure compressor; an intercooler to cool the compressed air from the low pressure compressor to the high pressure compressor; and a row of variable inlet guide vanes in the low pressure turbine. - View Dependent Claims (30, 31, 32, 33, 34)
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37. An industrial gas turbine engine for electrical power production, the industrial gas turbine engine comprising:
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a high pressure spool with a high pressure compressor driven by a high pressure turbine; a combustor operable between the high pressure compressor and the high pressure turbine; an electric generator directly coupled to the high pressure spool in synchronous operation with a local area power grid; a low pressure spool with a low pressure compressor driven by a low pressure turbine, the high pressure spool and the low pressure spool being rotatably independent; a row of variable inlet guide vanes in the low pressure turbine; a compressed air line fluidly connecting the low pressure compressor to the high pressure compressor to supply compressed air from the low pressure compressor to the high pressure compressor; a stator vane cooling circuit connected to the compressed air line downstream from the intercooler and passing through a row of stator vanes in the high pressure turbine; a rotor blade cooling circuit connected to the compressed air line downstream from the intercooler and passing through a row of rotor blades in the high pressure turbine; a boost compressor located between the low pressure compressor and the stator vane cooling circuit and the rotor blade cooling circuit; and a diffuser located between an outlet of the high pressure compressor and an inlet of the combustor, the diffuser having an inner plenum and an outer plenum separated by a compressed air passage from the outlet of the high pressure compressor, the stator vane cooling circuit discharges into the outer plenum, the rotor blade cooling circuit discharges into the inner plenum, and cooling air from the inner plenum and the outer plenum flowing substantially parallel to the compressed air from the high pressure compressor into the combustor. - View Dependent Claims (38, 39)
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40. An industrial gas turbine engine for electrical power production, the industrial gas turbine engine comprising:
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a main spool with a high pressure compressor driven by a high pressure turbine; a combustor operable between the high pressure compressor and the high pressure turbine; an electric generator directly coupled to the main spool and configured to be in synchronous operation with a local area power grid; a turbocharger spool with a low pressure compressor driven by a low pressure turbine, the low pressure compressor connected to the high pressure compressor to supply compressed air to the high pressure compressor; a first row of variable inlet guide vanes on the high pressure compressor; a second row of variable inlet guide vanes on the low pressure turbine; and a third row of variable inlet guide vanes on the low pressure compressor. - View Dependent Claims (41)
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Specification