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US 5,689,948 AGranted
Method of operating a reheat power plant with steam injection
AssigneeAsea Brown Boveri AG
InventorHans-Ulrich Frutschi
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AssigneeAsea Brown Boveri AG
InventorHans-Ulrich Frutschi
Estimating the term…
In a method of operating a power station plant which essentially comprises a gas-turbine group and a waste-heat steam generator (14) arranged downstream, the exhaust gases from said gas-turbine group, which essentially comprises a compressor (1),tcw a first combustion chamber (4), a first turbine (7), a second combustion chamber (9), a second turbine (12) and a generator (19), are directed through said waste-heat steam generator (14). The superheated steam (15) arising there is injected at a suitable point into the gas-turbine group. The saturated steam (16) arising there flows via a heat exchanger (17) through which a portion of compressor air (18) flows. The saturated steam (16) is converted into superheated steam (25) which is subsequently likewise injected into the gas-turbine group. The measures increase the efficiency and multiply the specific output of the plant.
A method of operating a power station plant which includes a gas-turbine group and a waste-heat steam generator arranged downstream through which exhaust gases from the gas-turbine group flow, the gas-turbine group including a compressor unit, a first combustion chamber acting downstream of the compressor unit, a first turbine acting downstream of the first combustion chamber, a second combustion chamber acting downstream of the first turbine, and a second turbine acting downstream of the second combustion chamber, the combustion chambers being operated with a fuel, comprising the steps of injecting a portion of the steam produced in the waste-heat steam generator downstream of the compressor unit, directing another portion of the steam produced in the waste-heat steam generator through at least one heat exchanger through which compressor air flows to heat said another portion of the steam, and injecting steam from said heat exchanger into a unit of the gas-turbine group downstream of the compressor unit.
Dependencies are inferred from the claim text.