Abstract: A closed circuit fuel heating system is provided for heating at least two types of fuel. The heating system includes a heat transfer subsystem disposed in a gas turbine system exhaust. A first heat exchange subsystem is coupled to a first fuel source and the heat transfer subsystem. The first heat exchange subsystem is provided with a control component for controlling a flow of a working fluid through the first heat exchange subsystem. A second heat exchange subsystem may be coupled to a second fuel source and the heat transfer subsystem. The second heat exchange subsystem is provided with a control component for controlling a flow of the working fluid through the second exchange subsystem. A subsystem for controlling the temperature of the working fluid is also provided.

Abstract: Systems and methods for operating a gas turbine combustion system by generating a flame detection signal are provided. A set of modeled parameters expected when there is a flame in a secondary combustion zone is calculated. A set of measured gas turbine parameters is measured. A flame validation signal based on the set of measured parameters and the set of modeled parameters is generated. The systems include a subsystem that calculates a set of modeled parameters expected when there is a flame in the secondary combustion zone and a subsystem that measures a set of measured parameters. A subsystem generates a flame validation signal based on the set of measured parameters and the set of modeled parameters.

Abstract: A system enclosure ventilation monitoring system includes a controller having an enclosure temperature input configured to receive signals indicating internal temperatures of the system enclosure, an air circulating device speed input configured to receive signals indicating operating speed of at least one air circulating device, and a damper position input configured to receive a damper position signal and an output. The controller is configured and disposed to set damper position through the output based on at least one of the air circulating device speed input and the enclosure temperature input.

Abstract: The present application provides a fuel nozzle. The fuel nozzle may include a tube and a gas only insert tip positioned on the tube. The gas only insert tip may include a tip aperture. A plug may be positioned within the tip aperture.