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) | |