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11 June 2008 - Siemens chose POWER-GEN Europe to announce the latest uprating of one its largest heavy duty gas turbines, the SGT5-4000F.
Speaking at a press conference in Milan, Harald Huttmann, head of new equipment sales for Siemens Energy in Europe, said, "A series of small modifications have resulted in a significant difference in both efficiency and performance."
The SGT5-4000F first went into commercial operation in 1996 with a rating of 240 MW and an efficiency level of 37 per cent and currently there are 144 in commercial operation, with 221 units under contract.
This latest upgrade is the third to be achieved by Siemens and brings the rating of the machine up to 292 MW with an efficiency level of 39.9 per cent.
This latest upgrade step has been focused on the turbine blades and vanes and the metallic heat shield in the combustor and involves improved thermal barrier coatings, minor casting changes as well as the extended use of proven vane sealing plates.
The upgrade can be retrofitted to existing machines during planned outages and Siemens believe that, depending on project conditions, the upgrade can be worth up to g15m to customers and save more than 100 000 t of CO2 over the entire lifetime of a power plant.
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