WO/2009/140100 is referenced by 9 patents.
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.