USED 1981 GE FRAME 6B GAS TURBINE

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:

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