Method and apparatus for controlling fuel in a gas turbine...

F - Mech Eng,Light,Heat,Weapons – 02 – C

Patent

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F02C 7/224 (2006.01) F01D 25/18 (2006.01)

Patent

CA 2724272

A method and system for controlling fuel in a gas turbine engine (10) including a fuel supply system channeling fuel to a combustor (10) are provided. The system' includes a first heat exchanger (302) configured to transfer heat between a working fluid such as engine lubricating oil and a first cooling medium such as air. The system also includes a second heat exchanger in series flow communication with the first heat exchanger (302) wherein the second heat exchanger (304) is configured to transfer heat between the working fluid and a second cooling medium such as engine fuel. The system further includes a modulating valve (306, 406) configured to control the flow of at least one of the first and the second cooling media to maintain a temperature of the first or second cooling medium such as engine fuelsubstantially equal to a predetermined limit.

L'invention porte sur un procédé et sur un système pour commander du carburant dans un moteur à turbine à gaz (10), comprenant un système de distribution de carburant canalisant du carburant vers une chambre de combustion (10). Le système comprend un premier échangeur de chaleur (302) configuré pour transférer de la chaleur entre un fluide de travail, tel qu'une huile de lubrification pour moteur, et un premier milieu de refroidissement, tel que de l'air. Le système comprend également un second échangeur de chaleur en communication d'écoulement en série avec le premier échangeur de chaleur (302), le second échangeur de chaleur (304) étant configuré pour transférer de la chaleur entre le fluide de travail et un second milieu de refroidissement, tel qu'un carburant de moteur. Le système comprend en outre une soupape de modulation (306, 406) configurée pour commander l'écoulement d'au moins l'un des premier et second milieux de refroidissement afin de maintenir une température du premier ou du second milieu de refroidissement, tel qu'un carburant de moteur, sensiblement égale à une limite prédéterminée.

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