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 NO_x 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)

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

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

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.

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%.

NO_x emissions: ≤ 15 ppmvd (corrected to 15% O₂ dry)

*Other fuels on request

**NOₓ emissions at 15% O₂ on fuel gas (with DLE)

*Other fuels on request

**NOₓ emissions at 15% O₂ on fuel gas (with DLE)

Dimensions exclude inlet filter housing and exhaust stack. For power generation, the AC generator is included. For mechanical drive, the driven equipment is excluded.