SGT-400 industrial gas turbine
Twin-shaft engine for mechanical drive and power generation
Twin-shaft design provides core commonality for mixed-duty applications requiring power and compression
Simple cycle power generation (ISO) up to 0 MW(e)
Mechanical drive: up to 14.9 MW
Broad flexibility in fuels, operating conditions, maintenance concepts, package solutions, and ratings
Evolution in rotors, blades and combustion technology enhances efficiency, flexibility and availabilityThe SGT-400 is a simple, robust twin-shaft gas turbine, suitable for both power generation and mechanical drive applications. The product services the 10 – 15 MW power band and can be used in all climates, onshore and offshore. A technological leap forward when it debuted 20 years ago, the SGT-400 continues to be a leader in operational and fuel flexibility, low emissions and overall efficiency. Enhancements to rotors and blades combined with local support and a 33% increase in the time between overhauls ensure high availability and low lifecycle costs. Recent advancements like the can-annular design with single-stage combustion mean the SGT-400 can burn a wide range of fuel compositions and run efficiently at all loads. It can meet stringent emissions standards while running loads as low as 30% and has seamless, true dual-fuel capability.
Highlights of the SGT-400 gas turbine
Can burn many fuel types and qualities, including liquid fuels and gases with high inerts, thanks to controls technology. The engine, equipped with DLE burners, is capable to burn up to 10 vol% of hydrogen (H2). Equipped with diffusion burners with unabated NOx emissions, it can burn up to 65 vol% of hydrogen (H2).
Ingenious design to the core
The SGT-400’s twin-shaft design is simple yet robust. It features a two-bearing gas generator rotor with an 11-stage axial flow transonic compressor and a two-stage, overhung compressor turbine. The SGT-400 free power turbine also has a robust two-stage, overhung design.
Enhancements to rotors and blades have extended the availability of the turbine, which permits output speeds up to 10,000 rpm (12,075 rpm for the 11 MW configuration). The rotors are contained in heavy-duty casings that are horizontally and vertically split, so maintenance can be carried out on-site as needed. The compressor uses variable guide vanes for robust operability and optimized performance across a range of operating conditions. High-chrome blades for high-corrosive environments are also an option.
The gas turbine is equipped with a DLE combustion system to achieve low NOx emissions with both gaseous and liquid fuels. The can-annular, single-stage combustor technology can burn a wide range of fuel types and quality – including liquid fuels or gas directly from wells. Advanced controls enable true dual-fuel capability, with seamless switching between fuel types without losing production.
The compact SGT-400 gas turbine packages for both power generation and mechanical drive applications are designed to be easily transported, installed and maintained. They are equipped with factory-tested modules and offer a high power-to-weight ratio. The packages consist of the gas turbine, gearbox (if necessary), driven unit and all factory-tested fluid modules, mounted on an underbase.
The shop-tested and certified fluid system modules are common for all SGT-400 gas turbine packages and come fully wired into the control systems:
· Auto drains module
· Gas fuel module
· Lube oil module
· Liquid fuel module (optional)
Suitable for offshore oil and gas applications
Its size and power make the SGT-400 an ideal offshore and onshore gas turbine. For example, it can be used for:
· Power generation on offshore oil platforms and FPSO vessels
· A drive solution for pumps, such as for water injection in oil production, in crude oil processing and for the transport of refinery products via pipelines
· A drive solution for compressors for gas injection, to increase pressure in pipelines and in natural gas processing
SGT-400 gas turbine packages on FPSO vessel
Siemens delivered two SGT-400 power generation units to power the water injection system on the FPSO vessel “Cidade de Itajai,” which operates at the Tiro and Sidon fields in the southern part of the Santos Basin off the coast of Brazil.
Comprehensive, local service for minimized downtimes
Siemens specialists provide local, on-site support and remote monitoring to optimize the turbine’s performance and keep lifecycle costs low. Our comprehensive portfolio of services include Long Term Programs (LTP), overhaul service, field service, spare parts, service exchange, remote diagnostic service, and modernization and upgrades. Core engine maintenance can be performed on-site or off-site.
SGT-400 maintenance features:
· Easy core engine exchange
· Multiple borescope inspection ports to avoid unnecessary maintenance outages
· Vertically and horizontally split intake casing
· Horizontally split compressor casing
· Combustion pressure casings split vertically for easy access to combustion hardware
Covering a wide Wobbe range
The SGT-400 is able to burn a wide range of gases, including gaseous fuels that aren’t pipeline quality, as well as distillate liquid fuels. It covers a Wobbe fuel range from approximately 50 MJ/m3 to 17.5 MJ/m3, which includes fuels available in LNG liquefaction plants, wellhead gas and minimally processed weak wellhead gas, coke oven gas, biogas from ethanol industry waste, or landfill gas, for example. The engine has a hydrogen (H2) capability of up to 10 vol% (with DLE burners), or up to 65% (with diffusion burners with unabated NOx emissions).
The SGT-400 offers true dual-fuel DLE capability, with automatic changeover from primary to secondary fuel at any load.
Low emissions in a rugged industrial design
The field-proven, reliable DLE combustor offers clean combustion with low emissions over a wide operating range.
The SGT-400 uses six reverse-flow tubular combustion chambers around a high-pressure casing. Each burner contains its own ignition source and is capable of gas-only, liquid-only or dual-fuel operation. The fuel is controlled by both a pilot and main burner, with the control system ensuring smooth, automatic changeover across the power range.
With its DLE combustion system, the turbine complies with emission regulations even at lower operation loads down to 30%.
NOx emissions: ≤ 15 ppmvd (corrected to 15% O2 dry)
Performance data for simple cycle power generation
*Other fuels on request
**NOₓ emissions at 15% O₂ on fuel gas (with DLE)
Performance data for mechanical drive
*Other fuels on request
**NOₓ emissions at 15% O₂ on fuel gas (with DLE)
The SGT-400 is suitable for the following applications and industries:
Learn more about the SGT-400 gas turbine
Experience the evolution of the SGT-400 in commercial operation worldwideWith more than 20 years of operating experience, the SGT-400 is proven in combined heat and power plant applications as well as offshore and onshore oil and gas applications. More than 390 units have been sold with more than 5.0 million hours of operating experience.
Please use another Browser
It looks like you are using a browser that is not fully supported. Please note that there might be constraints on site display and usability. For the best experience we suggest that you download the newest version of a supported browser: