Gas turbine system with cooling fluid generator
View Patent ↗A gas turbine system ( 1 A) includes a gas turbine unit ( 2 ) and a cooling fluid generator ( 5 ). The gas turbine unit ( 2 ) includes a first compressor ( 21 ) and a first expansion turbine ( 23 ) coupled to each other by a first shaft ( 22 ), a combustor ( 26 ), and a fuel tank ( 30 ). A fuel held in the fuel tank ( 30 ) circulates through a fuel circulation passage ( 31 ). A working fluid that has a pressure increased by the first compressor ( 1 ) is extracted from the gas turbine unit ( 2 ). The cooling fluid generator ( 5 ) includes a cooler ( 55 ) for cooling, with the fuel flowing through the fuel circulation passage ( 31 ), the working fluid that has been extracted from the gas turbine unit ( 2 ), and a second expansion turbine ( 53 ) for expanding the working fluid that has flowed out of the cooler ( 55 ).
1. A gas turbine system with a cooling fluid generator comprising:
a gas turbine unit comprising a first compressor for compressing a working fluid, a combustor in which a fuel is injected into the working fluid discharged from the first compressor so as to be combusted, a first expansion turbine for expanding a combustion gas generated in the combustor, the first expansion turbine being coupled to the first compressor by a first shaft, and a fuel tank for holding the fuel to be supplied to the combustor;
a fuel circulation passage that allows the fuel held in the fuel tank to circulate therethrough; and
the cooling fluid generator comprising a cooler for cooling, with the fuel flowing through the fuel circulation passage, the working fluid that has a pressure increased by the first compressor and that has been extracted from the gas turbine unit, and a second expansion turbine for expanding the working fluid that has flowed out of the cooler,
wherein the cooling fluid generator further comprises a second compressor,
wherein the first compressor and the cooler are connected via at least the second compressor,
wherein the working fluid is air, and the gas turbine system further comprises a temperature adjuster for adjusting a temperature of the air discharged from the second expansion turbine, and
wherein the gas turbine unit further comprises a regenerative heat exchanger for exchanging heat between the combustion gas discharged from the first expansion turbine and the air to flow into the combustor, and
the temperature adjuster comprises a mixer for mixing the air discharged from the second expansion turbine with air taken from atmosphere, and
a heat exchanger for exchanging heat between the air that has flowed out of the mixer and the combustion gas that has flowed out of the regenerative heat exchanger.
2. The gas turbine system with the cooling fluid generator according to claim 1 , wherein the second compressor compresses the working fluid that has a pressure increased by the first compressor, before the working fluid flows into the cooler.
3. The gas turbine system with the cooling fluid generator according to claim 1 , wherein the second expansion turbine is coupled to the second compressor by a second shaft.
4. The gas turbine system with the cooling fluid generator according to claim 1 , wherein a liquid fuel is held in the fuel tank, the fuel circulation passage is provided with a branch passage that branches from the fuel circulation passage on an upstream side of the cooler and that reaches the combustor, and the cooling fluid generator further comprises a vaporizer for vaporizing the fuel flowing through the branch passage with the working fluid discharged from the second compressor.
5. The gas turbine system with the cooling fluid generator according to claim 4 , wherein the branch passage is provided, on a downstream side of the vaporizer, with a pressure accumulator.
6. The gas turbine system with the cooling fluid generator according to claim 1 , wherein the cooling fluid generator further comprises a moisture separator for separating moisture from the working fluid discharged from the second expansion turbine.
7. The gas turbine system with the cooling fluid generator according to claim 1 , further comprising a fuel cooler for cooling the fuel held in the fuel tank or the fuel flowing through the fuel circulation passage.
8. The gas turbine system with the cooling fluid generator according to claim 7 , wherein the gas turbine system is to be incorporated in a vehicle, and the fuel cooler cools the fuel with wind generated by travelling of the vehicle.
9. The gas turbine system with the cooling fluid generator according to claim 1 , wherein the gas turbine unit further comprises a power generator coupled to the first shaft.
10. The gas turbine system with the cooling fluid generator according to claim 9 , wherein the fuel circulation passage is configured to pass through the power generator.
11. The gas turbine system with the cooling fluid generator according to claim 1 , wherein the fuel circulation passage is connected to the tank and passes through the cooler.
12. The gas turbine system with the cooling fluid generator according to claim 1 , wherein both ends of the fuel circulation passage are connected to the fuel tank.
13. The gas turbine system with the cooling fluid generator according to claim 1 , wherein a flow path that allows the working fluid to flow therethrough is formed, and the flow path passes through the first compressor, the second compressor, the cooler and the second expansion turbine in this order.
14. A gas turbine system with the cooling fluid generator comprising:
a gas turbine unit comprising a first compressor for compressing a working fluid, a combustor in which a fuel is injected into the working fluid discharged from the first compressor so as to be combusted, a first expansion turbine for expanding a combustion gas generated in the combustor, the first expansion turbine being coupled to the first compressor by a first shaft, and a fuel tank for holding the fuel to be supplied to the combustor;
a fuel circulation passage that allows the fuel held in the fuel tank to circulate therethrough; and
the cooling fluid generator comprising a cooler for cooling, with the fuel flowing through the fuel circulation passage, the working fluid that has a pressure increased by the first compressor and that has been extracted from the gas turbine unit, and a second expansion turbine for expanding the working fluid that has flowed out of the cooler, wherein
the working fluid is air,
the gas turbine system further comprises a temperature adjuster for adjusting a temperature of the air discharged from the second expansion turbine,
the gas turbine unit further comprises a regenerative heat exchanger for exchanging heat between the combustion gas discharged from the first expansion turbine and the air to flow into the combustor, and
the temperature adjuster comprises a mixer for mixing the air discharged from the second expansion turbine with air taken from atmosphere, and a heat exchanger for exchanging heat between the air that has flowed out of the mixer and the combustion gas that has flowed out of the regenerative heat exchanger.