SGT5-8000H: The world’s most efficient single-shaft H-class gas turbine
The SGT5-8000H boasts outstanding performance and high operational flexibility. The air-cooled turbine provides a power output of 450 MW. With short start-up times and the ability to handle high load variations, the turbine offers low lifecycle costs and helps to meet fluctuating power demands.
It is the core component of highly efficient gas-fired power plants. To date, more than 116 units have been sold worldwide, with a total fleet operating time of over 4.6 million hours, an output of 675 MW, and an efficiency of over 62% in combined cycle operation.
Key benefits of the SGT5-8000H gas turbine technology
The SGT5-8000H, the first air-cooled H-class turbine, set a global efficiency record and combines top performance with reliable operation.
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. The 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 expertise, while incorporating the latest aerodynamic technologies. The key benefits are high efficiency, reliability and 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.
Thanks to its light and stiff rotor with internal cooling air passages, advanced can annular combustion system and Hydraulic Clearance Optimization (HCO) active clearance control, the gas turbine is capable of world-class fast cold starts and hot restarts. It can achieve combined cycle base load within 30 minutes for hot starts.
Four stages of fast-acting, variable-pitch guide vanes (VGVs) will optimize performance across a wide range of operating conditions, improving part-load efficiency and reducing emissions at low part loads, while also enabling high-load transients.
More than 100 H-class gas turbines are in commercial operation, with more than 4.0 million fired hours.
SGT5-8000H technical features and power plant integration
Designed to bridge the gap between traditional fossil fuels and a decarbonized future, the SGT5-8000H offers the flexibility to complement intermittent renewable sources.
Core engine
Package solutions
Power plants
Service
Fuels
Emissions
Ingenious design to the core
The rotor is based on self-centring and self-aligning discs with Hirth serration and a central tie rod. This provides the advantage of enabling rotor maintenance to be carried out on site.
The advanced annular combustion system in the combustion chamber creates a uniform temperature profile at the turbine entry, ensuring high fuel flexibility and reliability of your gas turbine. Moderate firing temperatures enable the use of reliable, proven materials, reducing maintenance and 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 includes the core turbine, SGen5-2000P generator, and auxiliary systems. Siemens Energy offers a standard design with options for customer needs, aiming for quick installation and efficient power generation. Subsystems are grouped in separate packages to reduce field assembly, and the compact design suits limited spaces.
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 Energy H-class turbine feature a fast-start capability. They can achieve combined cycle base load within 30 min for hot start (start-up gradient: 35 MW/min). These 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, these plants are the profitable solution for competitive energy markets with fluctuating power demand. Air-cooled configurations are also available for low water consumption. 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
Siemens Energy offer Long Term Programs (LTP), overhaul services, field services, spare parts, reconditioning of components and modernization upgrades. Scheduled servicing and short-term support are available 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 and transport costs for workshop maintenance. All compressor blades can be replaced without de-stacking or lifting the rotor.
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
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)
SGT5-8000H technical specifications and performance benchmarks
Key specifications for the world's most efficient 50 Hz heavy-duty gas turbine.
Simple cycle power generation
Combined cycle power generation
Physical dimensions
Performance data for simple cycle power generation
Gross power output
450 MW(e)
Fuel (examples)
Natural gas, LNG, distillate oil. Other fuels on request
Frequency
50 Hz
GT ramp-up
up to 80 MW/min
Gross efficiency
41.2%
Gross heat rate
8,740 kJ/kWh (8,284 Btu/kWh)
Turbine speed
3,000 rpm
Pressure ratio
21.0 : 1
Exhaust mass flow
935 kg/s (2,061 lb/s)
Exhaust temperature
630°C (1,166°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)
CO emissions
10 ppmvd
NOₓ emissions at 15% O₂ at ISO ambient conditions.
SCC5-8000H: Performance data for combined cycle power plant
Scope: SCC5-8000H 1S with 1 x SGT5-8000H gas turbine, 1 x SST5-5000 steam turbine, and 1 x SGen5-3000W generator, SPPA-T3000 I&C system, and BENSON® HRSG
Samsun, Turkey (2015)
Customer: Cengiz Enerji
Power output: ~ 600 MW
Efficiency: > 60%
Scope: SCC5-8000H 1S with 1 x SGT5-8000H gas turbine, 1 x SST5-5000 steam turbine, 1 x SGen5-3000W generator, SPPA-T3000 I&C system, and BENSON® HRSG
