| CPC F02C 9/18 (2013.01) [F02C 6/18 (2013.01); F02C 7/057 (2013.01); F02C 7/141 (2013.01); F25J 1/0012 (2013.01); F25J 1/0283 (2013.01); F05D 2260/232 (2013.01); F25J 2230/22 (2013.01); F25J 2230/40 (2013.01)] | 18 Claims |
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1. A gas turbine plant comprising:
a gas turbine that includes a compressor capable of compressing air, a combustor capable of generating a combustion gas by burning fuel in compressed air that is the air compressed by the compressor, and a turbine capable of being driven by the combustion gas;
a liquefaction facility capable of liquefying gaseous air; and
a liquefaction controller that controls the liquefaction facility, wherein the compressor includes a compressor rotor rotatable around an axis line, a compressor casing that covers an outer periphery of the compressor rotor, a plurality of stator blades provided on an inner periphery side of the compressor casing, and an intake air amount regulator capable of regulating an intake air amount, which is a flow rate of the air flowing into the compressor casing, by an opening operation and a closing operation,
the liquefaction facility includes
a bleed air line capable of bleeding part of the compressed air from the compressor,
a liquefaction system capable of liquefying the compressed air flowing through the bleed air line,
a bleed air amount regulating valve capable of regulating a flow rate of the compressed air flowing through the bleed air line,
a liquid air tank capable of storing liquid air which is the compressed air liquefied in the liquefaction system,
a return air line capable of leading return air, which is the liquid air in the liquid air tank or vaporized air obtained by vaporization of the liquid air, to a flow path through which the air or the compressed air flows in the gas turbine, or to a high-temperature part which comes into contact with the combustion gas, among parts configuring the gas turbine, and
a return amount regulating valve capable of regulating a flow rate of the return air flowing through the return air line,
the liquefaction controller is configured to lead the compressed air to the liquefaction system by opening the bleed air amount regulating valve when an opening degree of the intake air amount regulator is a first opening degree or when a parameter having a correlation with the opening degree is a value corresponding to the first opening degree, and lead the return air to the gas turbine by opening the return amount regulating valve when the opening degree of the intake air amount regulator is a second opening degree, which is an opening degree larger than the first opening degree, or when the parameter is a value corresponding to the second opening degree, and
wherein the first degree opening has an amount of an intake air flowing into the compressor casing that is smaller than the amount of the intake air when the output of the gas turbine is a rated output.
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