Utility steam turbines– proven technology
power output from 90 to
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Inlet steam pressure: 80 – 260 bar(a)
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Inlet steam temperature: 310 – 610 °C
Proven utility steam turbines
Siemens offers a comprehensive range of steam turbine products in the power output range from 90 to 1,900 MW. These are used in conventional fossil-fired steam power plants as well as in nuclear and combined cycle power plants. With more than 8,000 steam turbines in service worldwide we provide proven technology, adapted to the specific local conditions.
SST-3000 utility steam turbine package
Flexible steam turbine for applications in single-shaft and multi-shaft combined cycle configurations
The compact arrangement features a two-cylinder design with an axial exhaust for use in combined cycle power plants.
The SST-3000 series covers the power output range from 90 to 250 MW. It features a separate high-pressure (HP) turbine and combined intermediate-pressure / low-pressure (IP / LP) turbine with single flow axial exhaust for 50 and 60 Hz applications.
Technical data
- Power output 90 up to 250 MW
Frequency 50 or 60 Hz
- Inlet pressure up to 177 bar / up to 2,567 psi
- Inlet temperature up to 565 °C / up to 1,049 ° F
- Reheat steam conditions: Temperature up to 610 °C / up to 1,130 ° F
- Last stage blade length: 50 Hz – 80 cm to 115 cm / 31 inches to 45 inches
60 Hz – 76 cm to 95 cm / 30 inches to 38 inches
SST-4000 utility steam turbine package
Powerful and reliable – thanks to proven design for high efficiency
The SST-4000 series is our specialized turbine for dual-pressure, combined cycle applications. With the specialized design of the blade path, the entire power range from 100 to 380 MW can be covered with the highest reliability and availability.
Almost 40 turbines of this type are already in operation or in the commissioning stage, with a total installed capacity of approximately 7,200 MW.
The SST-4000 series consists of an intermediate-pressure and a low-pressure turbine. The installation is either high or low level arrangement with down, double-side or single-side exhaust. The turbine is able to provide process steam e. g. for industry or sea water desalination and can provide industrial heating.
Thanks to its systematically modular design, we can easily adapt the SST-4000 series to the individual operating conditions and thermal cycle of a plant. Another advantage is its fast installation, thanks to prefabricated, tested modules delivered ready for connection.
SST-5000 utility steam turbine package
Flexible condensing or back-pressure steam turbine
The SST-5000 is capable for supercritical and ultra-supercritical steam power plants. Due to its higher pressure and temperature ratings, power plant efficiency increases more than 46 percent and overall performance is improved.
In steam power plants the SST-5000 consists of a combined highpressure / intermediate-pressure turbine, and one or two low-pressure turbines. It is installed as a low- or high-level arrangement. There are various exhaust configurations available to create an optimized plant layout: down-, single-sided, and double-sided. Various extractions (up to 9 stages) create an optimized plant layout with down-, single-sided or doubles sided exhaust.
Technical data
- Power output: CCPP – 120 to 650 MW
SPP – 200 to 500 MW (SPP) - Efficiency: CCPP – 61.5% (CCPP)
SPP – 43% for subcritical variant, 45% for supercritical variant
- Frequency 50 or 60 Hz
- Main steam conditions:
CCPP – Inlet pressure up to 177 bar / up to 2,567 psi
Inlet temperature up to 600 °C / up to 1,112 ° F
SPP – Inlet pressure up to 260 bar / up to 3,770 psi
Inlet temperature up to 600 °C / up to 1,112 ° F
- Reheat steam conditions:
CCPP: 600 °C / 1,112 °F
SPP: 610°C / 1,130°C
- Last stage blade length: 50 Hz – 66 cm to 142 cm / 26 inches to 56 inches
60 Hz – 66 cm to 95 cm / 26 inches to 38 inches
SST-6000 utility steam turbine package
Reduced life-cycle costs
Siemens Steam Turbines of the SST-6000 series are widely operated in coal-fired steam power plants with a power output up to 1,200 MW and an efficiency up to more than 46 percent.
Products of the SST-6000 series consist of a high-pressure turbine, an intermediate-pressure (IP) turbine, and up to three low-pressure turbines for 50 and 60 Hz.
The SST-6000 is installed as a high-level arrangement with down exhaust. Various extractions (up to 10 stages) are possible for feed water preheating, process steam, and district heating. The installed capacity of SST-6000 all over the world is more than 100,000 MW.
Technical data
- Power output 300 up to 1,200 MW
- Efficiency 46,5 % (Double reheat: 48 %)
- Frequency 50 or 60 Hz
- Inlet pressure up to 330 bar / up to 4786 psi
Inlet temperature up to 600 °C / up to 1,112 ° F - Reheat conditions for single and double reheat: Temperature 630 °C / up to 1,166 ° F
- Last stage blade length: 50 Hz – 66 cm to 142 cm / 26 inches to 56 inches
60 Hz – 66 cm to 95 cm / 26 inches to 38 inches
SST-9000 utility steam turbine package
Leading technology for efficient, flexible and reliable power generation
The SST5-9000 is an exceptionally reliable steam turbine for applications in the conventional part of modern nuclear power plants (pressurized water reactors) with a capacity of 1000 MW to 1,900 MW.
The half-turn (25 turns per second) SST5-9000 consists of a double-flow high-pressure saturated steam turbine (HD) and up to three twin-flow low-pressure turbines (ND) with shrunk-on wheel disc rotors. Siemens low-pressure turbines with shrunk-on wheel discs represent technology that has been proven over decades. The result: no stress corrosion cracking and thus no replacement of the low-pressure rotor or wheel discs during the excepted service life.
