Combined cycle gas turbine system
A combined cycle gas turbine system is improved to enhance a gas turbine efficiency and a combined efficiency by effecting steam-cooling of a combustor transition piece and a turbine blade. The combined cycle system has a gas turbine ( 8 ) having a generator ( 1 ), a compressor ( 2 ), a combustor (...
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| Main Authors | , , |
|---|---|
| Format | Patent |
| Language | English |
| Published |
11.03.2004
|
| Online Access | Get full text |
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| Summary: | A combined cycle gas turbine system is improved to enhance a gas turbine efficiency and a combined efficiency by effecting steam-cooling of a combustor transition piece and a turbine blade. The combined cycle system has a gas turbine (
8
) having a generator (
1
), a compressor (
2
), a combustor (
3
), a blade cooling air cooler (
4
) and a turbine (
6
), a steam turbine (
29
) having a high pressure turbine (
21
), an intermediate pressure turbine (
22
) and a low pressure turbine (
23
), and a waste heat recovery boiler (
9
). Saturated water of a high pressure pump (
27
) is partially led into a demineralizer (
118
) and a water sprayer (
116
) for cooling steam to be supplied into a moving blade (
52
). The steam, after being used for cooling, is recovered into a reheater (
20
). Outlet steam of the high pressure turbine (
21
) is led into a stationary blade (
53
) for cooling thereof and the steam is then recovered into an inlet of the intermediate pressure turbine (
22
). Also, steam of an intermediate pressure superheater (
16
) is led into a combustor transition piece (
54
) for cooling thereof and the steam is recovered into the inlet of the intermediate pressure turbine (
22
). Thus, moving blade cooling steam is reduced and the combined efficiency is enhanced. |
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