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GE, Frame 6B, 1997, 42 MW, 50 Hz, Gas Turbine Power Plant

GE, Frame 6B, 1997, 42 MW, 50 Hz, Gas Turbine Power Plant

Description

  1. Overview
    1. Power plant: GE Frame 6B gas turbine generator set.
    2. Power generation: 42 MW ISO.
    3. Type: GE Frame 6B heavy industrial gas turbine with auxiliaries, turbine and generator package.
    4. Unit designation: GT11.
    5. Commissioning year: 1998.
    6. Total equivalent operating hours (EOH) since commissioning until 2016: 68,448.
    7. Total starts since commissioning until 2016: 2,166.
  2. Gas Turbine Specifications
    1. Model: GE Frame 6 (6001B).
    2. Manufacturer: Scotland (K.E.L).
    3. Year of manufacture: 1997.
    4. Turbine stages: 3.
    5. Compressor stages: 17.
    6. Rating: 34,490 kW.
    7. Operating speed: 5,114 rpm.
  3. Air Intake System
    1. Two-stage filtration: pre-filter and fine filter with evaporative cooling media before filters.
    2. Pre-filter: G4 class reverse flow pocket filter, 595 mm x 595 mm x 330 mm, 140 pieces.
    3. Fine filter: F8 class cassette filter, 592 mm x 592 mm x 292 mm, 140 pieces.
  4. Combustion System
    1. Type: Reverse-flow cannular with 10 combustion cans arranged around the compressor discharge casing.
    2. Major components: dual fuel nozzles, 2 spark plugs, 4 ultraviolet flame detectors, 10 combustion cans, 10 combustion chamber liners and transition pieces, 10 crossfire tubes linking the 10 cans.
  5. Bearings
    1. Bearing 1 (loaded thrust): tilting pad, equalizing.
    2. Bearing 1 (unloaded thrust): taper land, non-equalizing.
    3. Bearing 1 (journal): elliptical.
    4. Bearing 2 (journal): elliptical.
  6. Fuel System – Fuel Gas System (On-Base)
    1. Gas strainer.
    2. Stop/speed ratio and control valve assembly (VGA) comprising: gas control valve (VGC) with LVDTs (96GC-1 and 2), gas stop ratio valve (VSR) with LVDTs (96SR-1 and 2), gas stop ratio valve control servovalve (90SR), gas control valve control servovalve (65GC), gas fuel trip valve (VH5), gas fuel hydraulic supply filter (FH7).
    3. Gas vent solenoid valve (20VG-1).
    4. Gas pressure switch (63FG-3).
    5. Pressure gauges.
    6. Pressure transducers (96FG-2A, 2B and 2C).
    7. Distribution manifold.
  7. Fuel System – Fuel Oil System (On-Base)
    1. Low-pressure fuel oil filter (FF1).
    2. Stop valve (VS1).
    3. Main fuel oil pump (PF1).
    4. Bypass valve assembly (VC3).
    5. Flow divider (FD1).
    6. Magnetic pickups (77FD-1, 2 and 3).
    7. Check valves (VCK1-1 to 10).
    8. Pressure gauge assembly with selector valve.
    9. False start drain valve assembly (VA17).
    10. Fuel nozzles.
    11. Pressure switch (63FL-2).
  8. Lube Oil System
    1. Common forced-feed lubrication system for gas turbine and generator units.
    2. Lube oil reservoir and piping: 1,700 US gallons (6,435 liters) capacity storage tank integrated into the turbine base; includes manhole, drain pipes and plugs, filling connection.
    3. Main lube oil pump (P3): positive displacement type, mounted in and driven by the accessory gear; output pressure limited by back-pressure valve (VR1) to 4.48 bar g (65 psi g).
    4. Auxiliary lube oil pump (P2): submerged centrifugal type driven by a vertical AC motor (88QA); automatically starts on low bearing header pressure or turbine shutdown.
    5. Third lube oil pump (not specified further).
    6. System includes tank, pumps, heat exchangers, filters, valves, control and protection devices; circulates oil to turbine bearings, generator bearings, reduction gear, and accessory gear; a portion is filtered for use as control fluid.
  9. Specifications
    1. Fuel system: Dual fuel (Gas/Liquid)
    2. Turbine model: GE MS 6000 1B