Siemens SGT-400 Gas Turbine

Power Generation: ISO 12.9 MW(e) / 14.3 MW(e); Mechanical Drive: 13.4 MW / 14.9 MW

The Siemens SGT-400 gas turbine combines 25 years of experience in operating equipment with cutting edge aerodynamics and the latest combustion technologies. The twin-shaft turbine achieves a useful output of 12.9 MW(e) or 14.3 MW(e) for power generation and 13.4 MW or 14.9 MW for mechanical drive. The turbine permits an electrical efficiency of up to 35.4 percent for operation in a simple cycle, gas-fired power plant. The Siemens SGT-400 is available as a factory-assembled package and has an excellent power-to-weight ratio.

Overview of benefits

  • Proven design for maximum availability and supply reliability
  • Low emissions despite a rugged industrial design
  • Dry-Low Emissions (DLE) combustion system for liquid and gaseous fuels for reducing NOx emissions
  • The Siemens SGT-400 comes in a twin-shaft configuration for both power generation and mechanical drive applications, which allows the same spare parts to be used in mixed-duty installations
  • Competitive cost-to power ratio
  • Compact dimensions
  • On-site maintenance possible
  • Rapid core engine exchange option (minimizes downtime)
  • Ideal as offshore gas turbine in the oil and gas industry

Design and Characteristics

The Siemens SGT-400’s twin-shaft design permits excellent speed and load turndown flexibility. The simple design consists of a twin-bearing, gas generator rotor and a dual-stage, overhung compressor turbine. The Siemens SGT-400 free power turbine also has a two-stage, overhung design. The rotors are contained in heavy-duty casings which are horizontally and vertically split, allowing full on-site maintenance to be carried out. The gas turbine is equipped with a Dry Low Emissions (DLE) combustion system, which achieves low NOx emissions with both gaseous and liquid fuels as well as in dual-fuel mode.

Applications

Industrial power generation

The turbine permits an electrical efficiency of up to 35.4 percent for operation in a simple cycle gas-fired power plant. The Siemens SGT-400 is used for industrial power generation in the following applications:

  • Simple cycle applications
  • Combined cycle applications
  • Combined heat and power (CHP)
  • Power generation for the oil and gas industry (onshore for use in oil fields or refinery applications and offshore on platforms and FPSO vessels)

Mechanical drive

As a mechanical drive, for example as a compressor or pump drive, the Siemens SGT-400 has proven itself in the oil and gas industry – both onshore and offshore. When deployed as a mechanical drive for a compressor, the Siemens SGT-400 drives the compressor directly. Ordinarily, there is no need to connect an intermediate gearbox, since the turbine speed ranges from 4,800 to 10,000 rpm. The gas turbine is designed for variable-speed applications and loads and is suitable for a wide range of requirements, such as:

  • Drive solution for pumps, for example for water injection in oil production, in crude oil processing and for the transport of refinery products via pipelines
  • Drive solution for compressors for gas injection, pipelines and natural gas processing

Technical Data

Siemens SGT-400 Performance data for simple cycle power generation
13 MW Version 15 MW Version
Power output 12.9 MW(e) 14.3 MW(e)
Fuel Natural gas; liquid fuel; dual fuel; other fuels on request; automatic changeover from primary to secondary fuel at any load
Frequency 50 / 60 Hz 50 / 60 Hz
Gross efficiency 34.8% 35.4%
Heat rate 10,355 kJ / kWh 10,178 kJ / kWh
Turbine speed 9,500 rpm 9,500 rpm
Pressure ratio 16.8 : 1 18.9 : 1
Exhaust mass flow 39.4 kg / s 44.0 kg / s
Exhaust temperature 555 °C (1,031 °F) 540 °C (1,004 °F)
NOx emissions ≤ 15 vppm at 15% O2 on fuel gas (with DLE)
Siemens SGT-400 Performance data for mechanical drive applications
13 MW Version 15 MW Version
Power output 13.4 MW(e) 14.9 MW(e)
Fuel Natural gas; liquid fuel; dual fuel; other fuels on request; automatic changeover from primary to secondary fuel at any load
Efficiency 36.2% 36.8%
Heat rate 9,943 kJ / kWh 9,774 kJ / kWh
Turbine speed 9,500 rpm 9,500 rpm
Pressure ratio 16.8 : 1 18.9 : 1
Exhaust mass flow 39.4 kg / s 44.0 kg / s
Exhaust temperature 555 °C (1,031 °F) 540 °C (1,004 °F)
NOx emissions ≤ 15 vppm at 15% O2 on fuel gas (with DLE)

Contact Us

Fill out my online form.