2x GE Frame 6B gas turbines
# Technical Summary
Equipment Details
- Gas Turbines: Two GE MS 6001 B gas turbines paired with AEG
generators (Type S7102/2).
- Operation History:
- Commissioning: 1981
- Gas-fired Operation: Until 2005, primarily for base load (~7000
hours/year).
- Operational Hours in Combined Cycle:
- GT21: ~167,000 hours, ~1130 starts
- GT22: ~159,000 hours, ~1180 starts
- Retrofitted: In 1996 with water injection for NOx reduction.
- Conversion: In 2007 to peak load operation using heating oil (HEL)
with new steel chimneys and upgraded control systems to ABB Procontrol
14.
- Operational Hours in Peak Load:
- GT21: ~130 hours, ~177 starts
- GT22: ~150 hours, ~180 starts
- Last Network Operation: 2015
- Last Oil Service:
- GT21: October 2015
- GT22: September 2016
- Last Borescope Inspection: December 2016
- Defect: Heating oil transfer line issue in 2017 halted
operations.
- Decommissioning: September 2023
Technical Specifications
- Application: Generator drive
- Shaft Speed: 5105 rpm
- Control System: ABB Procontrol 14
- Protection Systems: Overspeed, overtemperature, vibration, and flame
monitoring
- Cooling Mechanism: Integrated rotation device in the torque
converter
Environmental Conditions
- Ambient Temperature: 15°C
- Air Pressure: 0.9945 bar
- Pressure Drop in Intake System: 10.0 mbar
- Exhaust Diffuser Outlet Pressure: 30.0 mbar
- Relative Humidity: 60%
Compressor Section
- Stages: 17 axial stages
- Type: High-performance axial compressor
- Casing: Horizontally split
- Inlet Guide Vanes: Adjustable
Turbine Section
- Stages: 3 continuous shaft stages
- Casing: Horizontally split
- Guide Vanes: Fixed
Combustion System
- Type: 10 concentric ring chambers around the compressor
- Fuel Nozzles: One per chamber, pressure atomized
- Ignition: 2 spring-loaded, self-retracting electrode-type spark
plugs
- Flame Monitors: 2 ultraviolet
Bearing Arrangement
- Number: 2
- Lubrication:
- Bearing No. 1: Pressure lubricated, combination of thrust and
journal bearings
- Bearing No. 2: Lemon bore journal bearing
Starting System
- Device: Diesel engine (12 V-71-NT turbocharger)
- Torque Converter: Hydraulic with integrated reversing gear and
rotation device
Fuel System
- Operating Fuel: Heating oil (HEL)
- Fuel Pump: Auxiliary gear-driven screw pump with constant flow
- Fuel Distributor: Free-rotating, 10 elements
- Fuel Shutoff Valve: Electrohydraulic servo control
- Fuel Filters: 2 low-pressure full-flow, 1 high-pressure full-flow
Lubrication System
- Lubricant: Petroleum-based
- Total Volume: ~7000 liters
- Main Oil Pump: Shaft-driven, flange-mounted to auxiliary gearbox
- Auxiliary and Emergency Oil Pumps: Motor-driven submersible
centrifugal pumps
Heat Exchanger
- Type: Oil/Water
- Quantity: Single unit
Lubrication Filters
- Type: Full-flow with changeover valve
- Quantity: 2
- Filter Type: 5-micron
Hydraulic System
- Pump: Gear-driven axial piston pump
- Filters: 2 full-flow with changeover valve
Cooling System
- Pump: Gear-driven centrifugal pump
Atomization Air System
- Main Compressor: Gear-driven centrifugal compressor
- Starting Compressor: Positive displacement pump driven by starting
diesel
- Pre-cooler: Tubular and air/water heat exchanger
- Air Filter: Centrifugal separator
Performance Data
- Output at Generator Terminals (Heating Oil): Base load 33.75 MW
- Efficiency: 29.9%
- Exhaust Mass Flow: ~131.3 kg/s
- Exhaust Temperature: ~530°C
The spare parts are:
- compressor and turbine blading, used (various) and revised (leading
row 2 + 3 and running row 1 + 2)
- Transition pieces used and revised
- Flammrohre used and revised
- Fuel nozzles and much more.
- Cover segments (new)
- As well as a complete warehouse with small parts (hydraulic
components, screw connections, seals, measurement technology, etc.)
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