Method to transfer fuel in a fuel system for a gas turbine...

Power plants – Combustion products used as motive fluid – Process

Reexamination Certificate

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Reexamination Certificate

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07131274

ABSTRACT:
A system for automatically transferring the fuel from one or more engine fuel manifolds directly to the engine fuel tank(s) during engine shutdown using an ejector pump has been presented. A checkvalve, which may be integrated with the ejector pump, is also used. A metering valve initiates fuel flow shutoff and is used in the draining of the fuel manifolds, thereby eliminating the need for an additional solenoid dedicated mainly to the shutoff function. The shutoff and pressurizing valve provides flow division between manifolds and manifold drain for systems having multiple manifolds. The bypass valve is used to turn the motive flow and/or manifold drain functions on and off as a function of engine speed at start and shutdown.

REFERENCES:
patent: 2707021 (1955-04-01), Harris
patent: 3810714 (1974-05-01), Turner
patent: 3841089 (1974-10-01), Clark
patent: 3901025 (1975-08-01), Bryerton et al.
patent: 4066386 (1978-01-01), Johnson et al.
patent: 5896737 (1999-04-01), Dyer
patent: 6442925 (2002-09-01), Dalton et al.

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