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SGT5-8000H heavy-duty gas turbine (50 Hz)

Well-proven H-class technology backed by largest commercially operating fleet experience in the market

    Rotate product

    Proven rotor design for world-class fast start on cold rotor and hot-restart capability

    Hydraulic Clearance Optimization (HCO) improves performance and reduces degradation

    Advanced can annular combustion system for high fuel flexibility and reliability

    Rotating blades replaceable without rotor de-stack or lift

    4-stage turbine with advanced materials and thermal barrier coating

    High cycling capability due to fully on-board internally air-cooled turbine section

    Improved part-load efficiency due to variable inlet guide vane plus 3 stages of fast-acting variable guide vanes

    Simple cycle power generation (ISO) 0 MW(e)

    Combined cycle efficiency: 61%

    Powerful gas turbine for highly efficient combined cycle applications

    Excellent performance and outstanding efficiency

    The SGT5-8000H was the very first air-cooled H-class gas turbine on the market. About 650,000 fired hours of operational experience make it the most reliable and tested H-class gas turbine technology available today. With a power output of 450 MW in simple cycle, or 665 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, with low operating and lifecycle costs. 

    All facts at a glance:
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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 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 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.

    Around 60 Siemens H-class gas turbines are in commercial operation, with about 650,000 fired hours. Overall, more than 85 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 SGT5-8000H package solution consists of the core turbine, an SGen5-2000H 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 designed for limited space requirements.



    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.



    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.