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Gas Turbine SGT-800
Power Generation: ISO 47.5 MW(e) / 50.5 MW(e)
The Siemens SGT-800 industrial gas turbine combines a reliable robust design with high efficiency and low emissions. This makes the SGT-800 an excellent choice for Industrial, Refinery and Oil & Gas applications in simple cycle, cogeneration or combined cycle installations. Over 165 units have been sold worldwide and have accumulated 2 million equivalent operating hours (EOH).
The SGT-800 offers broad flexibility in fuels, operation conditions, maintenance concepts, package solutions and ratings to meet current and future market needs. The high exhaust energy content makes it especially suitable for cogeneration and combined-cycle applications. The performance of the SGT-800 in combined cycle is best in class for its size. With up to 60 000 EOH between major overhauls, low maintenance cost and excellent heat rate, the Life Cycle Cost is very competitive.
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-Fields of Application
· Simple cycle power generation
· Combined cycle power generation
· Cogeneration / Combined heat and power (CHP)
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Power output |
ISO 47.5 MW(e) |
ISO 50.5 MW(e) |
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Fuel |
Natural gas and other gases within specification / Diesel no2 |
Natural gas and other gases within specification / Diesel no2 |
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Frequency |
50/60 Hz |
50/60 Hz |
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Electrical efficiency |
37.7% |
38.3% |
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Heat rate |
9,557 kJ/kWh (9,058 Btu/kWh) |
9,407 kJ/kWh (8,916 Btu/kWh) |
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Turbine speed |
6,608 rpm |
6,608 rpm |
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Compressor pressure ratio |
20.4:1 |
21.1:1 |
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Exhaust gas flow |
132.8 kg/s (292.8 Ib/s) |
134.2 kg/s (295.8 Ib/s) |
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Exhaust temperature |
541°C (1006°F) |
553°C (1027°F) |
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NOx Emissions (with DLE, corrected to 15% O2 dry) |
‘≤ 15 ppmV |
‘≤ 15 ppmV |
· Competitive life-cycle costs: plant design with focus on investment cost, availability, cycle efficiency, emissions, operation flexibility and long service life
· Designed according to international codes, standards and directives and with HSE (Health, Safety and Environment) compliance
· Packaged by Original Equipment Manufacturer - engineering and manufacturing performed at one location
· Emissions performance best in the 40-60 MW(e) class on dual fuel (dry) in the 50-100% load range
· Efficiency: high in all cycles, saving fuel and reducing CO2 to atmosphere
· Core engine with industrial design, single shaft (2 tilting pad bearings), cold-end drive and 3rd generation DLE
· Fuel changeover capability (gas to oil and oil to gas)
· Load rejection capability with ample margin to trip speed
· Flexible service concept for onsite maintenance - hot section "strip", modules or gas turbine replacement
· E-Service Applications (Operating Statistics, Upgrades & Enhancements)
 The SGT-800 is a single-shaft machine with fifteen compressor stages. The first three stages have variable geometry. To minimize leakage over the blade tips, abradable seals are applied to stages four to fifteen.
The three-stage turbine is built as one module for ease of maintenance and is bolted to the compressor shaft. Turbine stator flanges are air-cooled to reduce running clearances and improve efficiency. Its overall design ensures easy service access to the combustor and burners.
All SGT-800 units are equipped with Dry Low Emission combustion system to minimize NOx and CO emissions to ensure that the turbine complies with both global and regional regulations. It can operate on both gas and liquid fuels with on-line switchover between fuels. The SGT-800 DLE system is recognized for its robust design without complicated burner staging or controls. The combustor has a passive damping design for reliable operation. In combination with the single-shaft industrial design, the DLE system gives high stability and capability to handle different load transients.
The cold end of the gas turbine is connected to the generator via speed reduction reducing turbine speed from 6,600 rpm down to 1,500/1,800 rpm.
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