a gas turbine group comprises a device , arranged in a suction - intake duct , for cooling a suction - intake airflow . the device is , for example , a device for injecting a liquid mass flow . the cooling device is activated automatically when a first limit temperature of the ambient air is overshot and is deactivated automatically when a second limit temperature is undershot . stability of the automatic algorithm can be improved in that the second limit temperature can lie by a specific amount below the first limit temperature . in one embodiment , the limit temperatures are predetermined as a function of the position of an adjustable initial guide blade cascade .