Siemens has unveiled a new gas turbine performance enhancement designed to provide significant fuel savings and also cut CO2 emissions.

The SGT-800 enhancement is applicable to all existing SGT-800 units with 43-47.5 MW ratings.

Siemens said the upgrade offers up to a 3.5 per cent increase of simple cycle gas turbine efficiency and up to an additional 10 MW output, enhancing the power of 43-47.5 MW units up to 53 MW.

For combined cycle applications, the enhancement could result in a power increase of more than 20 MW and a 3.5 per cent lower heat rate, based on a combined cycle 2xSGT-800 and one steam turbine. The heat rate improvement contributes to both fuel savings and CO2emission reductions. 

Siemens explained that the upgrade is “infusing the components included in the later 50.5-54 MW versions of the SGT-800”.

“In this case, an improved compressor blade design is included for increased aerodynamic performance. Optimized gas path mass flow and component cooling in the turbine section are also included. The combined upgrades are designed to produce only a moderate increase in combustion chamber firing temperature.”

It added that the upgrade “is preferably installed in conjunction with a scheduled major overhaul. As it uses features from existing and proven SGT-800s with higher ratings, upgrade customers benefit from a proven and reliable technology.” 

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