Gas turbine chalks up half a million operating hours
With 79 turbines now sold, output recently increased from 45 to 47 MW, measured reliability factors of 99 per cent in operation and 95 per cent at start, and an availability factor of 96 per cent, the SGT-800 has reached a platform of successful maturity over a wide range of applications.
This is confirmed by the operating fleet having now reached the major milestone of 500,000 operating hours, the fleet leader alone having achieved almost 50,000 running hours.
The SGT-800 is robust and simple, designed for high reliability and low emissions while delivering high efficiency in both combined cycle and in simple cycle applications. The reliability factor (12 month rolling average) is an impressive 99.4 per cent, while the corresponding availability factor is a strong 96.3 per cent. All of the 500,000 hours are 'DLE hours,' ie Dry Low Emissions technology is implemented in all of the turbines. DLE helps to reduce emissions without sacrificing efficiency by resorting to water injection.
Launched in 1997 as a 43-MW machine under the name GTX100, evolving into a 45-MW machine, the SGT-800 now generates 47-MW with an electrical efficiency of 37.5 per cent (ISO) in open cycle. While the standard version for new sales is now 47 MW, a retrofit version is also available for customers with the 45-MW or 43-MW version.
In combined cycle the SGT-800 generates 66 MW with an efficiency of 54 per cent with dual-pressure heat recovery steam generator (HRSG). It is the largest of the Siemens industrial gas turbine range (5-50MW), and is specially designed for power generation or cogeneration. The entire range of Siemens gas turbines extends to 340 MW, the output of the newly developed SGT5-8000H, the biggest gas turbine in the world.
Sales of the uprated SGT-800 are currently booming, particularly in Russia, Australia and South-East Asia and market prognoses show that the growth is set to continue.
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