1981 GE Frame 6B gas turbine in Germany

- **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.)

Find more here - https://www.ucymachines.com/

Contact us at - sales@ucymachines.com