Technology

Excellent performance and outstanding efficiency

The SGT6-8000H was the very first air-cooled H-class gas turbine on the 60 Hz market and has since demonstrated its high operational flexibility and low lifecycle costs. More than 400,000 fired hours of operational experience make it the most reliable and tested H-class gas turbine technology available today. With a power output of 310 MW in simple cycle, or 460 MW in combined cycle operation, and a combined cycle efficiency of 61%, it is among the most efficient and powerful gas turbines in commercial operation.

Highlights of the SGT6-8000H gas turbine

In combined cycle operation, the SGT6-8000H gas turbine provides a power output of 460 MW and an efficiency of 61%. 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 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 25 Siemens H-class gas turbines are in commercial operation, with > 300,000 fired hours.  

Overall, around 80 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.

Standardized design, flexible solutions

The SGT6-8000H package solution consists of the core turbine, an SGen6-100A generator (or optionally, an SGen6-2000H 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 catered to limited space requirements.

The SGT6-8000H fires up

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. 

SGT6-8000H: Designed for short outages and easy maintenance

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 destacking and balancing, eliminates the need for a spare rotor as well as transport costs for workshop maintenance. All compressor blades are replaceable without rotor destack or lift. 

Fuel flexibility matters

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, syn-gas, low-calorific gases (low-BTU gases), naphta, condensate and others.

Low emissions


This gas turbine ensures an emission compliance over a wide load range.

NOₓ emissions at 15% O₂ dry:

  • Emissions on fuel gas at 15% O₂, without water injection: NOₓ ≤ 25 ppmvd | CO  ≤ 10 ppmvd

Technical data

Performance data for simple cycle power generation

NOₓ emissions at 15% O₂ at ISO ambient conditions.

SCC6-8000H: Performance data for combined cycle power plant

Physical dimensions and weight

The SGT6-8000H is suitable for the following applications and industries

First SGT6-8000H in Asia: The Dangjin 3 combined cycle power plant in Korea

Proven in commercial operation

Downloads and support

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.

For more information, please contact our Customer Support Center.

  • +49 180 524 24 71

Siemens AG

Freyeslebenstrasse 1

91058 Erlangen

Germany

(From the German fixed network € 0.14/min. and from the German mobile phone networks max. € 0.42/min.)

(Charges depending on provider)

References

Proven in commercial operation: SGT5-8000H reference highlights

More than 25 Siemens H-class turbines in commercial operation, with >400,000 fired fleet hours.  Overall, around 80 units are under contract.

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