Waste heat recovery system, gas turbine plant provided with same, waste heat recovery method, and installation method for waste heat recovery system
AssigneeMitsubishi Hitachi Power Systems, Ltd.
InventorsHideyuki UECHI, Hideaki SUGISHITA, Yukimasa NAKAMOTO, Yuichi OKA
Life of this patent
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Abstract
A gas turbine includes: a compressor configured to compress air; a combustor configured to combust fuel in the air compressed by the compressor so as to generate combustion gas; and a turbine configured to be driven using the combustion gas. Air coolers are configured to bleed the air from a plurality of places having different pressures in the compressor and cool the air bled from the respective places so as to generate cooling air. A waste heat recovery device is configured to recover waste heat from at least two of the air coolers.
Claims5
1-31. (canceled)
A waste heat recovery system comprising:
- a cooling air cooler that, in a gas turbine including a compressor that compresses air, a combustor that combusts fuel in the compressed air so as to generate combustion gas, and a turbine that is driven using the combustion gas, bleeds the air from the compressor and cools the air bled from the compressor thereby generating cooling air;
- and
- a waste heat recovery device that recovers waste heat from the cooling air coolers, wherein
- the waste heat recovery device includes a recovery line and an auxiliary compressor, and wherein
- the air bled from the compressor and water are introduced to the cooling air cooler,
- the air is cooled by heat exchange with the water in the cooling air cooler and the water recovers the waste heat included in the air,
- the water, has recovered the waste heat from the air, is introduced to the recovery line,
- the cooling air generated in the cooling air cooler is compressed by the auxiliary compressor, and
- the combustor is cooled with the cooling air compressed by the auxiliary compressor.
A waste heat recovery method comprising:
- a bleeding step of bleeding air from a compressor in a gas turbine including the compressor that compresses air, a combustor that generates combustion gas by combusting fuel in compressed air by the compressor, and a turbine that is driven using the combustion gas;
- a cooling step of cooling the air bled from the compressor by a cooling air cooler, thereby generating cooling air that cools high-temperature components;
- and
- a waste heat recovery step of recovering waste heat discharged from the cooling air cooler, wherein
- in the cooling step, the air bled from the compressor and water are introduced to the cooling air cooler, the air is cooled by heat exchange with the water in the cooling air cooler and the water recovers the waste heat included in the air, and
- in the waste heat recovery step, the water, has recovered the waste heat from the air, is introduced to a recovery line, the cooling air generated in the cooling air cooler is compressed by an auxiliary compressor, and the combustor is cooled with the cooling air compressed by the auxiliary compressor.
Dependencies are inferred from the claim text.