Utility steam turbines– proven technology

power output from 90 to

90 MW
Leading technology

Proven utility steam turbines

Siemens Energy offers a comprehensive range of steam turbine products in the power output range from 90 to 1,900 MW. These are used in 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 275 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 275 MW   
    Frequency 50 or 60 Hz

  • Inlet pressure
    up to 177 bar / up to 2,567 psi 
  • Inlet temperature
    up to 600 °C / up to 1,110 ° F

  • Reheat steam conditions: 
    Temperature up to 610 °C / up to 1,130 ° F
  • Last stage blade length:  
    50 Hz – 80 cm to 124 cm / 31 inches to 49 inches
    60 Hz – 76 cm to 103 cm / 30 inches to 41 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 non-reheat, combined cycle applications. With the specialized design of the blade path, the entire power range from 100 to 500 MW can be covered with the highest reliability and availability. More than 40 turbines of this type are already in operation or in the commissioning stage, with a total installed capacity of approximately 8,200 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 industries or sea water desalination and can provide industrial heating.

 

Thanks to its systematically modular design, the SST-4000 series can easily be adapted to the individual operating conditions and thermal cycle design of the plant. Its fast installation, thanks to prefabricated, tested modules delivered ready for connection, is of additional advantage.

Technical data

  • Power output 100 up to 500 MW  
    Frequency 50 or 60 Hz
  • Inlet pressure 
    up to 105 bar / up to 1,523 psi
    Inlet temperature 
    up to 565 °C / up to 1,050 ° 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-5000 utility steam turbine package

A steam turbine with short start-up times and variable start-up modes to ensure grid stability

Siemens Energy Steam Turbines of the SST-5000 series are operated in combined cycle power plants (CCPP) and in steam power plants (SPP). 

 

The SST-5000 steam turbine combined with a gas turbine, is able to achieve a net plant efficiency of more than 64 percent in combined cycle applications.

Technical data

  • Power output:
    CCPP – 
    120 to 700 MW
    SPP – 200 to 500 MW (SPP)   
  • Efficiency:
    CCPP – 
    64% (CCPP)
    SPP – 43% for subcritical variant, 46,4% 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 565 °C / up to 1,050 ° 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: 610 °C / 1,130 °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 103 cm / 26 inches to 41 inches

SST-6000 utility steam turbine package

Reduced life-cycle costs

Siemens Energy Steam Turbines of the SST-6000 series are widely operated in 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 4,786 psi
    Inlet temperature 
    up to 610 °C / up to 1,130 ° 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 103 cm / 26 inches to 41 inches

SST-9000 utility steam turbine package

Leading technology for efficient, flexible and reliable power generation

Siemens Energy Steam Turbines of the SST-9000 series are highly reliable for the application in conventional islands of advanced pressurized water reactors in nuclear power plants, with a power output up to 1,900 MW.

 

The half-speed (25 turns per second) SST-9000 series 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.

Technical data

  • Power output 1,000 up to 1,900 MW  
    Frequency 50 or 60 Hz
  • Inlet pressure 
    up to 80 bar / up to 1,160 psi
    Inlet temperature 
    up to 310 °C / up to 590 ° F
  • Last stage blade length:  
    50 Hz – 117 cm to 183 cm / 46 inches to 72 inches
    60 Hz – 107 cm to 142 cm / 42 inches to 56 inches
Technical data | all utility turbines

Everything at a glance

References

References

More than 20,000 steam turbines were delivered to sites all over the world within the past 100 years. Find below some chosen examples

Contact

Contact

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