OEM upgrade packages to gas turbines (GT) can significantly improve performance, operational flexibility and increase outage intervals. In combined cycle power plants, the impact of these upgrades should also be considered for the HRSG where the design was based on the original GT performance.
Common changes that impact the HRSG include :
- More efficient operation of the GT at lower load (lower flue gas mass flows, higher temperatures)
- Modifications to exhaust gas profiles at various loads
- Duct burner firing characteristics
- Changes to fuel fired
- Increased outage intervals
Tetra Engineering can assess the impact of changes in GT performance on the HRSG and help optimise O&M activities.
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