Patent ID: 11952940
Assignee: SIEMENS ENERGY GLOBAL GMBH & CO. KG
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A dual fuel combustion system for a gas turbine engine, comprising:
a liquid fuel supply line for supplying a liquid fuel from a liquid fuel source to one or more liquid fuel injector nozzles for injection into a combustor of the gas turbine engine,
a gas fuel supply line for supplying a gas fuel from a gas fuel source to one or more gas fuel injector nozzles for injection into the combustor of the gas turbine engine,
wherein the liquid fuel supply line and the gas fuel supply line are respectively provided with a liquid fuel valve and a gas fuel valve,
a water delivery system connected to deliver metered water to be injected into the combustor, whereby the water is premixed with the fuel in the one or more of fuel injector nozzles,
a control unit operatively coupled to the metering valve of the water delivery system for regulating a flow rate of water injected into the combustor as a function of an amount of fuel supplied to the one or more fuel injector nozzles,
wherein the control unit is operatively coupled to the liquid and gas fuel valves for switching between a liquid fuel operating mode and a gas fuel operating mode,
whereby, in the liquid fuel operating mode, the liquid fuel is premixed with the water in the liquid fuel injector nozzle prior to injection into the combustor, and
in the gas fuel operating mode, the water and the gas fuel are separately injected into the combustor via the liquid fuel injector nozzle and the gas fuel injector nozzles respectively.