SGT5-8000H gas turbine

Excellent performance and outstanding efficiency

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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Highlights of the SGT5-8000H gas turbine

In combined cycle operation, the SGT5-8000H gas turbine provides a power output of 665 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 SGT5-8000H can be easily integrated in single-shaft (SCC5-8000H 1S) or multi-shaft (SCC5-8000H 1x1 and 2x1) 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 engine's blade design is based on proven materials and tried and tested know-how, while incorporating the 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 SGT5-8000H has been optimized for short outages: Thanks to the Hirth-serrated rotor disk assembly and central tie rod, rotor maintenance and destacking can be done on site. 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.

More than 91 H-class gas turbines are in commercial operation, with more than 3.5 million fired hours. Overall about 108 H-class turbines are under contract. 

Ingenious design to the core

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.

Fast start-up rotor design

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.

Full on-board air cooling

On-board valves ensure controlled cooling air supply, to cover the needs of different operating conditions.

Standardized design, flexible solutions

The SGT5-8000H package solution consists of the core turbine, an SGen5-2000P 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.

SGT5-8000H gas turbine package for multi-shaft plants

Designed for short installation times, all package piping is prefabricated to minimize pipe cleaning and welding on site. 

Package footprint:

  • Length: 75 m (245 ft)
  • Width: 40 m (130 ft)
  • Gas turbine enclosure height: 13 m (42 ft)

SGT5-8000H gas turbine package for single-shaft plants

The main components of the SGT5-8000H single-shaft (1S) package are arranged on a single shaft, with a synchronous self-shifting (SSS) clutch between the generator and the steam turbine.

The SGT5-8000H fires up

Combined cycle power plants based on the Siemens H-class turbine feature a fast-start capability. You can achieve combined cycle base load within 30 min for hot start (start-up gradient: 35 MW/min).
The plants can operate from part load simple cycle up to full-load combined cycle. With excellent peaking capability, and high part load efficiency complying with emission regulations down to lower part load, this is your profitable solution for competitive energy markets with fluctuating power demand. For low water consumption, we offer air-cooled configurations.
All SGT5-8000H plant solutions strike an optimal balance between capital costs, performance, and operational considerations.


SCC5-8000H single-shaft plant

The main components of the SCC5-8000H 1S power plant are arranged on a single shaft. This enables a small footprint, and high operational flexibility and reliability.


SCC5-8000H multi-shaft plant

The SGT5-8000H multi-shaft plants can be based on one (SCC5-8000H 1x1), two (SCC5-8000H 2x1) or more H-class gas turbines.

Comprehensive services to support you

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 SGT5-8000H 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. 

Removable blades

Turbine blade 1, vane 1 and blade 4 can be removed without cover lift for easy and quick maintenance, also in case of unexpected events – offering you advantages for insurability.

Easy can removal

The combustor hardware is removable without cover lift for easy maintenance.

Fuel flexibility matters

Whatever your needs may be: The SGT5-8000H 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).

Uniform temperature profile

The advanced can annular combustion system creates a uniform temperature profile at the turbine entry, and enables high fuel flexibility and reliability.

Fast fuel switchover

The SGT5-8000H combustion system can switch over quickly between fuel gas and fuel oil and vice versa.

Designed to meet stringent environmental requirements

The SGT5-8000H 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)

Technical data for the SGT5-8000H

Performance data for simple cycle power generation

Gross power output450 MW(e)
Fuel (examples)Natural gas, LNG, distillate oil. Other fuels on request
Frequency50 Hz
GT ramp-upup to 80 MW/min
Gross efficiency41.2%
Gross heat rate8,740 kJ/kWh (8,284 Btu/kWh)
Turbine speed3,000 rpm
Pressure ratio21.0 : 1
Exhaust mass flow935 kg/s (2,061 lb/s)
Exhaust temperature630°C (1,166°F)
NOₓ emissions down to 2 ppmvd with SCR
CO emissions10 ppmvd
NOₓ emissions at 15% O₂ at ISO ambient conditions.

SCC5-8000H: Performance data for combined cycle power plant

 SGT5-8000HL CC 1x1/1SSGT5-8000HL CC 2x1
Frequency50 Hz50 Hz
Net plant power output675 MW1,350 MW
Net plant efficiency62.4%62.4%
Net heat rate5,770 kJ/kWh (5,469 Btu/kWh)5,770 kJ/kWh (5,469 Btu/kWh)
Number of gas turbines12
Steam temperature> 600° C (> 1,112° F)> 600° C (> 1,112° F)

Physical dimensions and weight

 Core turbine
Approx. weight445,000 kg (981,000 lb)
Length12.6 m (41 ft)
Width5.5 m (18 ft)
Height5.5 m (18 ft)

The SGT5-8000H 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.


Gas turbines portfolio (interactive PDF)
PDF (19 MB)

Articles and papers

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SGT-8000H series
PDF (119 KB)

Proven in commercial operation: SGT5-8000H reference highlights

Around 88 H-class turbines are in commercial operation, with more than 2.5 million fired fleet hours.

Do you have a question regarding our products, solutions and services?