Patent ID: 6711888
Filing Date: 2004-03-30
Classification: F02C,Y02E

Abstract:
A gas turbine having a compressor for compressing air supplied thereto and discharging the compressed air, a combustor for combusting the compressed air from said compressor and a fuel and a gas turbine to be driven by a combustion gas from said combustor, comprising:a water injection unit, arranged at an upstream side of said compressor and constructed so that water droplets are sprayed into the air to be supplied to the compressor to decrease the temperature of the air to be supplied into said compressor to a temperature lower than an atmospheric temperature and the sprayed water droplets introduced into said compressor with the air having been decreased in temperature are evaporated during passage through said compressor, said injection unit having a water supply system, an air supply system and a spray nozzle for being supplied with water and air from said water supply system and said air supply system and spraying water droplets; and a controlling unit for controlling the air supply quantity so that a ratio of air to the water supplied to said spray nozzle becomes larger than that at time of rated operation, when said water droplets are smaller than those at the time of rated operation.