HYBRID GAS TURBINE ENGINE - ELECTRIC MOTOR/GENERATOR DRIVE SYSTEM
First Claim
1. A method of operating a drive system for a load, the drive system including an electric motor/generator and a gas turbine engine, the engine including a combustor, and main and pilot flow paths via which fuel is supplied to the combustor, the engine being operable in a low emissions mode and a standard emissions mode, a proportion of the fuel that is supplied to the combustor via the pilot flow path being greater in the standard emissions mode than in the low emissions mode, the method comprising:
- determining whether an environmental condition is conducive to operating the engine in the low emissions mode; and
operating the electric motor/generator as a motor if the environmental condition is not conducive to operating the engine in the low emissions mode.
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Accused Products
Abstract
A method of operating a drive system for a load is disclosed. The drive system may have an electric motor/generator and a gas turbine engine. The engine may have a combustor, and main and pilot flow paths via which fuel is supplied to the combustor. The engine may be operable in low and standard emissions modes. A proportion of the fuel that is supplied to the combustor via the pilot flow path may be greater in the standard emissions mode than in the low emissions mode. The method may include determining an engine power requirement of the load, and whether the engine power requirement of the load is sufficiently large to operate the engine in the low emissions mode. Additionally, the method may include operating the electric motor/generator if the engine power requirement of the load is not sufficiently large to operate the engine in the low emissions mode.
33 Citations
20 Claims
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1. A method of operating a drive system for a load, the drive system including an electric motor/generator and a gas turbine engine, the engine including a combustor, and main and pilot flow paths via which fuel is supplied to the combustor, the engine being operable in a low emissions mode and a standard emissions mode, a proportion of the fuel that is supplied to the combustor via the pilot flow path being greater in the standard emissions mode than in the low emissions mode, the method comprising:
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determining whether an environmental condition is conducive to operating the engine in the low emissions mode; and operating the electric motor/generator as a motor if the environmental condition is not conducive to operating the engine in the low emissions mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of operating a drive system for a load, the drive system including an electric motor/generator and a gas turbine engine, the engine including a combustor, and main and pilot flow paths via which fuel is supplied to the combustor, the engine being operable in a low emissions mode and a standard emissions mode, a proportion of the fuel that is supplied to the combustor via the pilot flow path being greater in the standard emissions mode than in the low emissions mode, the method comprising:
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determining an engine power requirement of the load; determining whether the engine power requirement of the load is sufficiently large to operate the engine in the low emissions mode; and operating the electric motor/generator if the engine power requirement of the load is not sufficiently large to operate the engine in the low emissions mode. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A turbine-compressor unit, comprising:
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a centrifugal compressor; a gas turbine engine coupled to the centrifugal compressor, the engine including; a combustor; and main and pilot flow paths via which fuel is supplied to the combustor, wherein the engine is operable in a low emissions mode and a standard emissions mode, a proportion of the fuel that is supplied to the combustor via the pilot flow path being greater in the standard emissions mode than in the low emissions mode; an electric motor/generator coupled to the centrifugal compressor; and a controller in communication with the centrifugal compressor, the engine, and the electric motor/generator, the controller being configured to; determine an engine power requirement of the centrifugal compressor; determine whether the engine power requirement of the centrifugal compressor is sufficiently large to operate the engine in the low emissions mode; and operate the electric motor/generator if the engine power requirement of the centrifugal compressor is not sufficiently large to operate the engine in the low emissions mode. - View Dependent Claims (18, 19, 20)
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Specification