Abstract: A gas turbine control device according to at least one embodiment of the present disclosure comprises a purge gas flow rate control unit that controls the flow rate of purge gas for discharging fuel gas remaining inside the gas turbine to the outside of the gas turbine. The purge gas flow rate control unit controls the flow rate of the purge gas on the basis of a parameter related to the intake air quantity from a gas turbine inlet.

Abstract: In an atomizer constructed to cool inlet air for a gas turbine by spraying fine droplets of water into the inlet air, a spray nozzle is disposed to spray the finely atomized droplets of water from an outer edge of an atomized airstream into a high-speed zone thereof, towards a central region of the airstream. The atomized airstream meets an airstream of a low-speed zone formed at a downstream side, and after the two kinds of airstreams have been mixed and unified, this mixture is supplied to an axisymmetric compressor. Devices such as a feed water pipe and spray nozzle are placed in the low-speed zone so as not to obstruct the airstream.