Abstract: A gas accumulation detection and ventilation system for a gas turbine enclosure includes a pipe array positioned adjacent a floor of the gas turbine enclosure and a ventilation assembly including a fan, an air flow inlet and an air flow outlet. The pipe array includes at least one pipe having at least one opening therein. The fan of the ventilation assembly directs an air flow sweep through the air flow inlet along the floor of the gas turbine enclosure. A hazardous gas sensor panel in communication with the pipe array and the ventilation assembly detects an accumulation level of turbine fuel gas in the gas turbine enclosure based on input from the pipe array and activates the ventilation assembly according to the detected accumulation level.

Abstract: A fuel nozzle system for enabling a gas turbine to start and operate on low-Btu fuel includes a primary tip having primary fuel orifices and a primary fuel passage in fluid communication with the primary fuel orifices, and a fuel circuit capable of controlling flow rates of a first and second low-Btu fuel gases flowing into the fuel nozzle. The system is capable of operating at an ignition status, in which at least the first low-Btu fuel gas is fed to the primary fuel orifices and ignited to start the gas turbine, and a baseload status, in which at least the second low-Btu fuel gas is fired at baseload. The low-Btu fuel gas ignited at the ignition status has a content of the first low-Btu fuel gas higher than that of the low-Btu fuel gas fired at the baseload status. Methods for using the system are also provided.

Abstract: A gas accumulation detection and ventilation system for a gas turbine enclosure includes a pipe array positioned adjacent a floor of the gas turbine enclosure and a ventilation assembly including a fan, an air flow inlet and an air flow outlet. The pipe array includes at least one pipe having at least one opening therein. The fan of the ventilation assembly directs an air flow sweep through the air flow inlet along the floor of the gas turbine enclosure.

Abstract: A fuel supply system is provided having a first fuel gas compressor configured to be driven by a motor and a second fuel gas compressor configured to be driven by a shaft of a gas turbine system. The first fuel gas compressor and the second fuel gas compressor are configured to supply a pressurized fuel flow to a combustor of the gas turbine system, and the first fuel gas compressor and the second fuel gas compressor are coupled to one another in series.

Abstract: A fuel nozzle system for enabling a gas turbine to start and operate on low-Btu fuel includes a primary tip having primary fuel orifices and a primary fuel passage in fluid communication with the primary fuel orifices, and a fuel circuit capable of controlling flow rates of a first and second low-Btu fuel gases flowing into the fuel nozzle. The system is capable of operating at an ignition status, in which at least the first low-Btu fuel gas is fed to the primary fuel orifices and ignited to start the gas turbine, and a baseload status, in which at least the second low-Btu fuel gas is fired at baseload. The low-Btu fuel gas ignited at the ignition status has a content of the first low-Btu fuel gas higher than that of the low-Btu fuel gas fired at the baseload status. Methods for using the system are also provided.