SGT6-8000H gas turbine
Excellent performance and outstanding efficiency
The SGT6-8000H is suitable for the following applications and industries:
The H-class turbine was introduced nearly a decade ago and has now achieved a significant milestone with the 100th engine sold globally. With 88 turbines in operation on four continents and over 2.5 million fired hours, the SGT-8000H is the market leader in its class and delivers top performance that’s been setting benchmarks throughout the industry.
Since its launch, the output rating of the SGT5-8000H gas turbine has grown from 375 megawatt (MW) to 450 MW, with improvements in efficiency to over 62 percent in combined cycle operation.
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In combined cycle operation, the SGT6-8000H gas turbine provides a power output of 310 MW and an efficiency of 62%. Its internal cooling air passages from compressor to turbine section ensure fast thermal response of the rotor in case of high load transients and fast cold starts. A gas turbine designed for short start-up times and high operational flexibility.
The SGT6-8000H can be easily integrated in single-shaft (SCC6-8000H 1S) or multi-shaft (SCC6-8000H 1x1, 2x1, or 3x1) combined cycle plants.
Our proven and validated package and plant concepts use standardization, preassembly and prepackaging to minimize field assembly and the need for piping fabrication during construction. This results in easy turbine installation and a shorter project duration.
The blade design is based on proven materials and manufacturing processes, while incorporating latest aerodynamic technologies. Your benefit: high efficiency and reliability, as well as low outage risk.
Moderate firing temperatures allow the use of proven materials to boost reliability and keep maintenance low.
Additionally, the SGT6-8000H has been optimized for short outages: Thanks to the Hirth-serrated rotor disk assembly and central tie rod, rotor maintenance and de-stacking can be done onsite. The turbine blades 1 and 4, and vane 1 can be removed without lifting the cover for quick and easy maintenance.
The gas turbine is capable of world-class fast cold starts and hot restarts due to the light and stiff rotor with internal cooling air passages, the advanced can annular combustion system and Hydraulic Clearance Optimization (HCO) active clearance control. You can achieve combined cycle base load within 30 min for hot starts.
Four stages of fast-acting variable-pitch guide vanes (VGV) will grant you optimized performance over a wide range of operating conditions, improved part load efficiency, low part load emissions, and high load transients.
Around 91 H-class gas turbines are in commercial operation, with more than 3.5 million fired hours.
The rotor is based on self-centering and -aligning discs with Hirth serration and central tie rod, providing you with the advantage of on-site rotor maintenance.
The advanced can annular combustion system creates a uniform temperature profile at the turbine entry, ensuring a high fuel flexibility and reliability of your gas turbine. Moderate firing temperatures allow the use of proven materials that improve reliability while reducing maintenance, leading to excellent availability.
Light and stiff rotor design with internal air passages allows faster thermal transients and world-class fast cold start and hot restart capability. Combined cycle base load within 30 min for hot start.
On-board valves ensure controlled cooling air supply, to cover the needs of different operating conditions.
The SGT6-8000H package solution consists of the core turbine, an SGen6-1000A generator (or optionally, an SGen6-2000P generator), and auxiliary systems.
We offer you a standardized basic design with options geared to your specific requirements, as well as flexible solutions for short installation times and economic power generation. By grouping subsystems and installing them in separate auxiliary packages, we strive to minimize field assembly.
The gas turbine generator packages have a compact footprint designed for limited space requirements.
Designed for short installation times, all package piping is prefabricated to minimize pipe cleaning and welding onsite.
Package footprint:
The air intake is suitable for different multistage filters, e.g., pre-filter, fine- and/or HEPA filter or self-cleaning pulse filter systems. The use of an air intake silencer significantly reduces the pressure drop with improved noise reduction, thus ensuring compliance with noise protection regulations. Anti-icing systems and inlet air cooling with evaporative cooler are available as an option.
Combined cycle power plants based on the SGT6-8000H (plant name: SCC6-8000H) are profitable solutions for competitive energy markets with fluctuating power demand. Featuring a fast-start capability, it will achieve combined cycle base load within 30 min for hot start (start-up gradient: 30 MW/min). High load gradients allow for fast load changes. With excellent peaking capabilities, and a high part load efficiency with emission compliance down to lower part load, the SGT6-8000H plants strike an optimal balance between capital costs, performance, and operational considerations.
The main components of the SCC6-8000H 1S power plant are arranged on a single shaft. This enables a small footprint, and high operational flexibility and reliability.
The SGT6-8000H multi-shaft plants can be based on one (SCC6-8000H 1x1), two (SCC6-8000H 2x1), three (SCC6-8000H 3x1) or more H-class gas turbines. The 60 Hz plants are available as Flex-Plant series for optimized operational flexibility.
We offer Long Term Programs (LTP), overhaul services, field service, spare parts, reconditioning of components and modernization upgrades. Whether scheduled service or short-term support, our specialists are there for you, on-site all over the world.
The SGT6-8000H generator package is optimized for short outages. On-site rotor maintenance, including rotor de-stacking and balancing, eliminates the need for a spare rotor as well as transport costs for workshop maintenance. All compressor blades are replaceable without rotor de-stack or lift.
The rotor is based on self-centering and -aligning discs with Hirth serration and central tie rod, making it suitable for on-site maintenance.
The combustor hardware is removable without cover lift for easy maintenance.
The SGT6-8000H gas turbines are capable of firing a wide range of fuel gas, and fuel oil; as well as a wide range of non-standard fuels like LNG, syngas, low-calorific gases (low-BTU gases), naphta, condensate and others. The engines, equipped with DLE burners, can use up to 30 vol% of hydrogen (H2).
The advanced can annular combustion system creates a uniform temperature profile at the turbine entry, and enables high fuel flexibility and reliability.
The SGT6-8000H combustion system can switch over quickly between fuel gas and fuel oil and vice versa.
The SGT6-8000H gas turbine uses the can annular combustion system to successfully run in base and part-load operation while still complying with NOX and CO regulations.
NOX emissions: ≤ 25 ppmvd on fuel gas (without water injection, at 15%O2)
NOX emissions: ≤ 42 ppmvd on fuel oil (with water injection, at 15%O2)
| Gross power output | 310 MW |
| Fuel (examples) | Natural gas, LNG, sour gases, distillate oil, biodiesel, Arabian Super Light crude oil (ASL), kerosene, jet fuel, condensate. Other fuels on request |
| Frequency | 60 Hz |
| Gross efficiency | 40.4% |
| Gross heat rate | 8920 kJ/kWh (8455 Btu/kWh) |
| Turbine speed | 3,600 rpm |
| Pressure ratio | 21.0 : 1 |
| Exhaust mass flow | 650 kg/s (1,433 lb/s) |
| Exhaust temperature | 645°C (1,193°F) |
| NOₓ emissions | ≤ 25 ppmvd at 15% O₂ on fuel gas (without water injection for NOₓ control), ≤ 42 ppmvd at 15% O₂ on fuel oil (with water injection for NOₓ control) |
| Siemens combined cycle power plant | SCC6-8000H 1S / 1x1 | SCC6-8000H 2x1 | SCC6-8000H 3x1 |
|---|---|---|---|
| Gross plant power output | 472 MW | 948 MW | 1,422 MW |
| Gross plant efficiency | 61.9% | 62.1% | 62.1% |
| Gross heat rate | 5,815 kJ/kWh (5,512 Btu/kWh) | 5795 kJ/kWh (5493 Btu/kWh) | 5795 kJ/kWh (5493 Btu/kWh) |
| Number of gas turbines | 1 | 2 | 3 |
| Pressure/reheat | Triple/Yes | Triple/Yes | Triple/Yes |
| Core turbine | |
| Approx. weight | 289,000 kg (637,000 lb) |
| Length | 10.5 m (34 ft) |
| Width | 4.3 m (14 ft) |
| Height | 4.3 m (14 ft) |
In our download section, you can find brochures, technical papers, and more. Or you can contact us directly for specific inquiries.
Technical papers
Around 88 H-class turbines are in commercial operation, with more than 2.5 million fired fleet hours.
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