SGT-400 Industrial gas turbine

The Siemens Energy SGT-400 is a durable twin-shaft gas turbine suitable for power generation and mechanical drive applications in the 10 – 15 MW power band, suitable for all climates, onshore and offshore.

It boasts operational and fuel flexibility, low emissions, and overall efficiency, with enhancements to rotors and blades as well as a 33% increase in time between overhauls.

Its can-annular design with single-stage combustion enables it to burn a wide range of fuel compositions efficiently at all loads, meeting stringent emissions standards even at low loads, and offering seamless true dual-fuel capability.

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Ingenious design to the core

SGT-400's twin-shaft design includes a two-bearing gas generator rotor with an 11-stage axial flow transonic compressor and a two-stage, overhung compressor turbine
Robust free power turbine features a two-stage, overhung design
Enhanced rotors and blades extend availability, enabling output speeds up to 10,000 rpm (12,075 rpm for the 11 MW configuration)
Heavy-duty casings, horizontally and vertically split, enable on-site maintenance
Variable guide vanes optimize performance, and high-chrome blades are available for high-corrosive environments
Equipped with a DLE combustion system for low NOx emissions with gaseous and liquid fuels
Can-annular, single-stage combustor technology allows burning a wide range of fuel types
Advanced controls provide true dual-fuel capability with seamless switching between fuel types without production loss

SGT-400 packages

The compact SGT-400 gas turbine packages for power generation and mechanical drive applications are designed for easy transport, installation, and maintenance
They feature factory-tested modules and a high power-to-weight ratio, including the gas turbine, gearbox (if needed), driven unit, and all factory-tested fluid modules mounted on an underbase
The shop-tested and certified fluid system modules, common for all SGT-400 gas turbine packages, are fully wired into the control systems and include:
- 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

Comprehensive, local service for minimized downtimes

Our 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 can burn a wide range of gases, including non-pipeline quality gaseous fuels and distillate liquid fuels, covering a Wobbe fuel range from approximately 50 MJ/m3 to 17.5 MJ/m3.

This includes fuels available in LNG liquefaction plants, wellhead gas, minimally processed weak wellhead gas, coke oven gas, biogas from ethanol industry waste, or landfill gas.

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. Additionally, it offers true dual-fuel DLE capability with automatic changeover from primary to secondary fuel at any load.

integrated power-to-X-to-power hydrogen gas turbine demonstrator

Low emissions in a rugged industrial design

The field-proven DLE combustor provides clean combustion with low emissions across a wide operating range in the SGT-400.

It utilizes six reverse-flow tubular combustion chambers around a high-pressure casing, each capable of gas-only, liquid-only, or dual-fuel operation. The control system ensures smooth, automatic changeover of fuel across the power range.

The DLE combustion system enables the turbine to comply with emission regulations even at lower operation loads down to 30%, with NOx emissions of ≤ 15 ppmvd (corrected to 15% O2 dry).

	11 MW version	13 MW version	15 MW version
Power output	10.5 MW(e)	12.9 MW(e)	14.3 MW(e)
Fuel*	Natural gas, liquid fuel, dual fuel	Natural gas, liquid fuel, dual fuel	Natural gas, liquid fuel, dual fuel
Frequency	50/60 Hz	50/60 Hz	50/60 Hz
Gross efficiency	34.8%	35,00 %	35.6%
Heat rate	10,168 kJ/kWh (9,638 Btu/kWh)	10,294 kJ/kWh (9,756 Btu/kWh)	10,103 kJ/kWh (9,572Btu/kWh)
Turbine speed	11,500 rpm	9,500 rpm	9,500 rpm
Pressure ratio	16.4 : 1	16.9 : 1	18.5 : 1
Exhaust mass flow	34.2 kg/s (75.4 lb/s)	40.0 kg/s (86.3 lb/s)	44.5 kg/s (98.1 lb/s)
Exhaust temperature	510 °C (950 °F)	555 °C (1,019 °F)	529 °C (984 °F)
NOx emissions**	≤ 25 ppmvd	≤ 15 ppmvd	≤ 15 ppmvd

	11 MW version	13 MW version	15 MW version
Power output	10.9 MW	13.4 MW	14.9 MW
Fuel*	Natural gas, liquid fuel, dual fuel	Natural gas, liquid fuel, dual fuel	Natural gas, liquid fuel, dual fuel
Efficiency	36.8%	36.4%	37.1%
Heat rate	9,754 kJ/kWh (9,241 Btu/kWh)	9,886 kJ/kWh (9,366 Btu/kWh)	9,702 kJ/kWh (9,191 Btu/kWh)
Turbine speed	5,750 - 11,500 – 12,075 rpm	4,750 - 9,500 – 9,975 rpm	4,750 - 9,500 – 9,975 rpm
Pressure ratio	16.4 : 1	16.9 : 1	18.5 : 1
Exhaust mass flow	34.3 kg/s (75.5 lb/s)	39.1 kg/s (86.3 lb/s)	44.5 kg/s (98.1 lb/s)
Exhaust temperature	509 °C (949 °F)	543 °C (1,019 °F)	529 °C (984 °F)
NOx emissions**	≤ 25 ppmvd	≤ 15 ppmvd	≤ 15 ppmvd

	Power generation package	Mechanical drive package	Mechanical drive package
	11 MW, 13 MW and 15 MW	13 and 15 MW	11 MW
Approx. weight	11 MW, 13 MW and 15 MW	40,000 kg (88,000 lb)	30,409 kg (67,040 lb)
Length	14.0 m (46 ft)	7.3 m (24 ft)	6.9 m (24 ft)
Width	3.1 m (10 ft)	3.1 m (10 ft)	2.9 m (9.5 ft)
Height	4.3 m (14 ft)	4.3 m (14 ft)	3.5 m (11.5 ft)