초록 ▼

A control system for the injection of water or steam into the combustion chambers of a combustion turbine for reducing the emission of oxides of nitrogen in the exhaust gas of a combustion turbine is described. The control system includes a water control valve having a linear flow versus stroke char

A control system for the injection of water or steam into the combustion chambers of a combustion turbine for reducing the emission of oxides of nitrogen in the exhaust gas of a combustion turbine is described. The control system includes a water control valve having a linear flow versus stroke characteristic which is controlled by an error signal representing the difference between a predetermined water-to-fuel schedule and the actual water-to-fuel schedule. Instruments for monitoring and recording water and fuel flow are also described.

대표청구항 ▼

A control system for the injection of water into the combustion chambers of a gas turbine for reducing the emission of oxides of nitrogen in the turbine exhaust, said system comprising: means sensing the fuel flow to said turbine and providing an electrical signal proportional to fuel flow; means se

A control system for the injection of water into the combustion chambers of a gas turbine for reducing the emission of oxides of nitrogen in the turbine exhaust, said system comprising: means sensing the fuel flow to said turbine and providing an electrical signal proportional to fuel flow; means sensing the water flow to the combustion chambers of said turbine and providing an electrical signal proportional to water flow; a water control valve for controlling the water flow to said combustion chambers; means for sensing the position of the shaft of said water control valve and providing an electrical signal proportional to shaft position; maximum signal selector means responsive to said electrical signal proportional to shaft position and said electrical signal proportional to water flow and providing an output signal having a magnitude equal to the larger of the shaft position signal and the water flow signal, and means responsive to said electrical signal proportional to fuel flow and said output signal from said maximum signal selector for computing a water error signal representative of the difference between the actual water-to-fuel flow and a predetermined water-to-fuel schedule, said water control valve responsive to said water error signal for maintaining the water flow to said combustion chambers in accordance with said predetermined water-to-fuel schedule.