| 摘要 |
PROBLEM TO BE SOLVED: To provide a two-shaft gas turbine capable of maintaining low NOx and stable combustion even if a combustion air temperature changes by temporarily bleeding compressed air to outside of the gas turbine before completion of activation.SOLUTION: A two-shaft gas turbine comprises: a combustor 2 including a plurality of fuel systems F1 to F4 capable of independently supplying fuel, burning the fuel from the fuel systems F1 to F4 and air compressed by a compressor 1, and generating fuel gas; a high-pressure turbine 3 coaxially connected to the compressor 1, rotating by the fuel gas, and driving the compressor 1; a low-pressure turbine 23 including a shaft structure independent of a shaft structure of the high-pressure turbine 3, and rotating by exhaust gas from the high-pressure turbine 3; a bleeding flow passage 26 bleeding the air compressed by the compressor 1; an injection flow channel 27 returning the air bled by the bleeding flow passage 26 to the combustor 2; and a controller 400 controlling flow volumes of the fuel supplied to the respective fuel systems F1 to F4 on the basis of a flow volume of the air of the compressor 1, a flow volume of the fuel supplied to the combustor 2, and an air temperature T in the injection flow passage 27. |
