Siemens Gas Turbines

Meeting your needs and driving your profitability

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The Siemens gas turbine range has been designed and refined to help you meet the challenges of a dynamic market. Our 15 models with capacities from 5 to 375 MW, are designed with your profitability in mind. Whatever the application, our gas turbines meet the requirements for efficiency, reliability and environmental compatibility, giving low life-cycle costs and the best possible return on investment.

Watch our videos and learn more about our gas turbines with capacities from 4 to 375 MW and our gas turbine manufacturing facilities.

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Product Information

Gas Turbine SGT-750

Power Generation: ISO 35.93 MW(e) / Mechanical Drive: 37.11 MW

Description
Overview
Technical Data
Benefits
Design Concept
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SGT-750 – Count on it!

The SGT-750 is the latest development in the Siemens gas turbine range. The versatile machine can be employed for both power generation and mechanical drive. Besides economic viability and ecofriendliness thanks to its high degree of efficiency and low emission levels, prime features of this gas turbine are its high level of availability and reliability.

36 MW(e) SGT-750 - a low-weight industrial gas turbine

The 36 MW(e) SGT-750 is a low-weight industrial gas turbine designed and developed to incorporate size and weight advantages of the aeroderivative gas turbine whilst maintaining the robustness, flexibility and longevity of the traditional heavy-duty industrial gas turbine. The unit combines a series of well tried and proven materials, components and design principles to form the most modern and fuel-efficient unit of this type.

Fields of Application

Simple cycle power generation
Combined cycle power generation
Cogeneration / Combined heat and power (CHP)
Mechanical Drive

Power generation 35.93 MW(e)
Fuel	Natural Gas
Frequency	50/60 Hz
Electrical efficiency	38.7 %
Heat rate	9,296kJ/kWh (8,811 Btu/kWh)
Turbine speed	6,100 rpm
Compressor pressure ratio	23.8:1
Exhaust gas flow	113.3 kg/s (249.8 lb/s)
Exhaust temperature	462° C (864° F)
NOx emissions (with DLE, corrected to 15 % O2 dry)	≤ 15ppmV

Mechanical drive 37.11 MW (49,765 bhp)
Fuel	Natural gas
Efficiency	40.0 %
Heat rate	9,002 kJ/kWh (6,362 Btu/bhph)
Turbine speed	3050-6405 rpm
Compressor pressure ratio	23.8:1
Exhaust gas flow	113.3 kg/s (249.8 lb/s)
Temperature	462° C (864° F)
NOx emissions (with DLE, corrected to 15 % O2 dry)	≤ 15ppmV

High efficiency – Low fuel consumption
Exhaust heat suitable for cogen- combi
High availability – low downtime ’17 days in 17 years’
Designed to be service-friendly
Fast gas generator exchange
On-site maintenance or local workshop
Easy access for boroscope inspection
State-of-the-art dry low emission (DLE) system
Robust – safe operation

The SGT-750 gas generator section consists of a 13-stage axial air compressor built up from a number of fully electron-beam-welded disks. The intermediate shaft is welded on to the compressor and the two gas-generator turbine disks are bolted onto the intermediate shaft. The low pressure section is manufactured in low alloy steel, whereas Inconel 718 is used for the disks in the high pressure section. The cooled gas generator turbine stator and rotor blades are precision-cast.

Although the compressor section is of conventional horizontally split design, the remainder of the unit uses vertically split, single-piece, circular stator components, thus eliminating loss of circularity and reducing aerodynamic losses to a minimum. These sections can be removed as modules for permits easy access and simple maintenance.

The combustion chamber system consists of eight cans with double-skin serial-cooled design, and eight transition ducts of double-skin parallel cooled design, suitable for both liquid and gaseous fuels. The can design provides for excellent maintainability and exchangeability.

The two-stage compressor turbine comprises the stator with guide vanes and the rotor assembly bolted to the compressor rotor. The first stage is cooled by a combination of internal convective cooling and film cooling whereas the second-stage is cooled by internal convective cooling.

The power turbine is a two-stage axial-flow turbine, aero-dynamically connected to the gas generator. The nominal turbine speed is 6100 rpm and the direction of shaft rotation is clockwise looking in the direction of the flow.

In Mechanical Drive applications, the turbine speed range is 50 – 105 % of the nominal speed.

The complete gas turbine unit is mounted on a foundation frame with single-lift capability, and with a skid split between driver and driven equipment. Driven equipment can also be located on a concrete foundation for onshore applications. The lubrication oil system is installed inside the GT package. All the auxiliary systems, except for the liquid fuel system, the water injection system and the fire extinguishing system, are mounted on the base frame.