SGT-700 gas turbine
High fuel flexibility, low emissions
The SGT-700 is derived from the SGT-600 and is designed to offer you higher output and efficiency as well as lower emissions with a wide fuel range capability.
This gas turbine is an ideal fit for power generation and mechanical drive applications. With the high exhaust heat, it is also excellent for cogeneration as well as for combined cycle applications.
Do you have a question regarding our products, solutions and services?
Highlights of the SGT-700 gas turbine
The SGT-700 offers best-in-class fuel flexibility that allows for high content of inert gases, hydrogen and heavy hydrocarbons:
- Ethane 100%
- Propane 100%
- Butanes and heavy alkanes 15%
- Hydrogen up to 55%
- Nitrogen 40%
- H₂S 3%
The SGT-700 features a third-generation dual-fuel Dry Low Emissions (DLE) combustion system:
- NOₓ emissions level < 15 vppm
- CO emissions level < 20 vppm
- Turn down 50% load
- Same DLE system for dual and liquid operation
- NOₓ emissions on liquid fuels < 58 ppmvd
- CO emissions on liquid fuels < 25 ppmvd
- Turn down 50% on liquid fuels
- Dual-fuel DLE capability with fuel changeover capability (gas to liquid fuel and liquid fuel to gas) on load
The SGT-700 features a reliable, robust and easily maintainable design for maximized uptime.
- Reliability > 99%
- On-site or off-site maintenance
- 24-hour swap capability
- 17 maintenance days in 15 years
- 30,000 equivalent operating hours (EOHs) between hot section inspections
- Part load operation increases the time between overhauls
Thanks to a long lifetime with maximized uptime, low lifecycle cost and easy servicability, the SGT-700 offers you a high lifetime profitability. The robust industrial design offers a low degradation over time.
- Core engine
- Package solutions
- Power plants
- Service
- Fuels
- Emissions
Ingenious design to the core
The SGT-700 provides the best availability of its class, thanks to a robust and well-proven design. The compact twin-shaft engine is easy to maintain and allows for flexible operation with excellent efficiency at part load conditions.
Using the same design for power generation and mechanical drive increases the operational reliability.
Reliable and easy to maintain
The SGT-700 employs an 11-stage axial-flow transonic compressor incorporating the latest aerodynamics, with variable guide vanes for robust operability and optimized performance over a wide range of operating conditions.
Two-stage free power turbine
The 2-stage uncooled free power turbine offers a nominal shaft speed of up to 6,500 rpm. For mechanical drive, it may operate at 50 to 105 % of the nominal speed. The power turbine can be matched for optimal performance at different ambient conditions.
Packages for power generation and mechanical drive
The SGT-700 package offers you a small footprint and excellent serviceability. It features a modular and flexible design with single-lift capability.
The driver for both the power generation and the mechanical drive package is the same.
A gas turbine package includes:
Gas turbine, enclosure, base frame, air intake, exhaust, lubricating systems, starter system, vibration monitoring system, firefighting system, package ventilation system, instrumentation, gas detection, fuel systems, gearbox (if needed).
Power generation package
The SGT-700 is ideal for simple cycle, combined cycle, cogeneration, and other heating applications thanks to its high exhaust temperature and the ability to handle sudden load changes.
- Low space requirements
- Modular design for high versatility
- Optimized for easy transportation
Mechanical drive package
Extreme desert and arctic climates, or harsh industrial environments are not expected to impair the SGT-700 mechanical drive package’s long service life.
- Variable power turbine speed: 50 to 105%
- High load on low-power turbine speed
- Extended lifetime on part-load operation
- Low part-load emissions
SGT-700-based power plants
For combined cycle and cogeneration (combined heat and power – CHP), Siemens offers a broad range of power plant configurations and scopes based on the SGT-700 gas turbine. For combined cycle, 1x1 or 2x1 configurations are part of the standardized portfolio.
Excellent CC and CHP efficiency
High combined cycle performance: In a 2x1 combined cycle configuration, the power output is 91.6 MW(e) at a net plant efficiency of 53.1%.
Easy on-/off-site maintenance
The SGT-700 is designed for maximized serviceability.
- On-site maintenance or a gas generator removal for off-site maintenance
- Gas generator swap within 24 hours
Remote diagnostic service
Our remote diagnostic service helps you to detect faults at an early stage and prevents outages.
The service includes online monitoring, expert performance data analysis, and fleet data comparisons.
Designed for easy serviceability
- Burners are accessible from the outside for easy replacement.
- The compressor casing is horizontally split, and the turbine casing is vertically split between gas generator and power turbine.
- Multipe boroscope holes allow for internal visual inspection of the compressor.
Excellent fuel flexibility
The SGT-700 offers best-in-class fuel flexibility that allows for high content of inert gases, hydrogen and heavy hydrocarbons:
- Ethane 100%
- Propane 100%
- Butanes and heavy alkanes 15%
- Hydrogen up to 55%
- Nitrogen 40%
- H₂S 3%
The SGT-700 requires low gas supply pressure at site: 28 bar(a) / 406 psi(a).
Fuel changeover (gas to liquid fuel and liquid fuel to gas) on load.
Low emission capability
The combustor and burner design give world-class emission performance over a wide load range and are capable of low NOₓ emission levels.
Low emission levels are also received on liquid fuel without need of water injection.
Emissions for 100 – 50% load, NOₓ at 15% O₂:
- Natural gas: ≤ 15 – 25 ppmv
- Diesel No. 2: ≤ 42 – 58 ppmv
Emissions for 100 - 50% load, CO at 15% O₂:
- Natural gas: ≤ 10 – 25 ppmv
- Diesel No. 2: ≤ 25 ppmv
(Emissions depend upon site conditions, required load range and other project-specific data.)
Technical data
- Simple cycle power generation
- Combined cycle power generation
- Mechanical drive
- Physical dimensions
Performance data for simple cycle power generation
| 35 MW rating | 33 MW rating | |
|---|---|---|
| Gross power output | 35.2 MW(e) | 32.8 MW(e) |
| Fuel¹ | Natural gas, liquid fuel, dual fuel | Natural gas, liquid fuel, dual fuel |
| Frequency | 50/60 Hz | 50/60 Hz |
| Gross efficiency | 38.0% | 37.2% |
| Gross heat rate | 9,466 kJ/kWh (8,972 Btu/kWh) | 9,675 kJ/kWh (9,170 Btu/kWh) |
| Turbine speed | 6,500 rpm | 6,500 rpm |
| Pressure ratio | 20.4 : 1 | 18.7 : 1 |
| Exhaust mass flow | 98.7 kg/s (217.6 lb/s) | 95.0 kg/s (209.4 lb/s) |
| Exhaust temperature | 531 °C (988 °F) | 533 °C (991 °F) |
| NOₓ emissions² | ≤ 15 ppmvd | ≤ 15 ppmvd |
Performance data combined cycle power generation
| SCC-700: Performance data for 1x1 combined cycle power plant | ||
|---|---|---|
| 35 MW rating | 33 MW rating | |
| Gross power output | 49.8 MW | 46.7 MW |
| Gross plant efficiency | 54.5% | 54.2% |
| Gross heat rate | 6,609 kJ/kWh (6,264 Btu/kWh) | 6,648 kJ/kWh (6,301 Btu/kWh) |
| Number of gas turbines | 1 | 1 |
| SCC-700: Performance data for 2x1 combined cycle power plant | ||
|---|---|---|
| 35 MW rating | 33 MW rating | |
| Gross power output | 100 MW | 92.6 MW |
| Gross plant efficiency | 54.7% | 53.7% |
| Gross heat rate | 6,576 kJ/kWh (6,233 Btu/kWh)) | 6,703 kJ/kWh (6,353 Btu/kWh) |
| Number of gas turbines | 2 | 2 |
Performance data for mechanical drive
| 35 MW rating | 33 MW rating | |
|---|---|---|
| Gross power output | 36.2 MW | 33.7 MW |
| Fuel¹ | Natural gas, liquid fuel, dual fuel | Natural gas, liquid fuel, dual fuel |
| Gross efficiency | 39.0% | 38.2% |
| Gross heat rate | 9,230 kJ/kWh (8,932 Btu/kWh) | 9,424 kJ/kWh (8,748 Btu/kWh) |
| Drive shaft speed | 3,250 – 6,500 – 6,825 rpm | 3,250 – 6,500 – 6,825 rpm |
| Pressure ratio | 20.4 : 1 | 18.7 : 1 |
| Exhaust mass flow | 98.7 kg/s (209.4 lb/s) | 95.0 kg/s (217.6 lb/s) |
| Exhaust temperature | 531 °C (988 °F ) | 533 °C (991 °F ) |
| NOₓ emissions² | ≤ 15 ppmvd | ≤ 15 ppmvd |
Physical dimensions and weight
| Power generation package | Mechanical drive package | |
|---|---|---|
| Approx. Weight 35 MW rating: | 169,755 kg (374,245 lb) | 63,050 kg (139,000 lb) |
| Length | 18.8 m (61.7 ft) | 11.7 m (38.4 ft) |
| Width | 4.6 m (15.0 ft) | 4.0 m (13.1 ft) |
| Height | 4.0 m (13.1 ft) | 4.0 m (13.1 ft) |
| Power generation package | Mechanical drive package | |
|---|---|---|
| Approx. Weight 33 MW rating: | 163,193 kg (359,779 lb) | 63,050 kg (139,000 lb) |
| Length | 18.8 m (61.7 ft) | 11.7 m (38.4 ft) |
| Width | 4.6 m (15.0 ft) | 4.0 m (13.1 ft) |
| Height | 4.0 m (13.1 ft) | 4.0 m (13.1 ft) |
The SGT-700 is suitable for the following applications and industries:
Find out more about our gas turbine offerings
In our download section, you can find brochures, technical papers, and more. Or you can contact us directly for specific inquiries.
Brochures
Articles and papers
Proven in commercial operation: reference highlights
More than 85 units have been sold with over 2 million equivalent operating hours. The fleet-leading gas turbine has over 100,000 equivalent operating hours.
Do you have a question regarding our products, solutions and services?