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GE, LM-2500, 1986, 23 MW, 13600 Volts, Dual Frequency, Brush Generator

GE, LM-2500, 1986, 23 MW, 13600 Volts, Dual Frequency, Brush Generator

Description

  1. Overview
    1. Turbo-generator set driven by a gas turbine.
    2. Manufacturer: Brush (generator), built 1986.
    3. Gas turbine drive: G.E. model LM-2500.
    4. Rated capacity: 23 MW, 13600 volts, 1092 amps, 3600 rpm.
  2. Performance Data And Specifications
    1. Overall package performance curve (figure III-2A) presents continuous duty and maximum ratings at various ambient temperatures.
    2. At ISO conditions (sea level, 59 °F, no inlet or exhaust losses, zero humidity, natural gas fuel) the unit is rated as follows:
      1. Gas turbine shaft power: 21250 kW at 50 Hz, 22000 kW at 60 Hz.
      2. Generator efficiency: 0.975 at both 50 Hz and 60 Hz.
      3. kW at generator terminals: 20720 kW at 50 Hz, 21450 kW at 60 Hz.
      4. Specific fuel consumption: 9740 btu/kwh (LHV) at 50 Hz, 9460 btu/kwh (LHV) at 60 Hz.
      5. Exhaust mass flow: 149.6 lbs/sec at 50 Hz, 149.0 lbs/sec at 60 Hz.
      6. Exhaust temperature: 1422 °R at 50 Hz, 1415 °R at 60 Hz.
    3. Gas turbine performance must be adjusted for altitude above sea level, inlet losses, exhaust losses, and humidity (see figures III-2B through III-2E).
    4. Water or steam injection for NOx abatement will impact gas turbine and overall package performance; detailed information in section XII.
    5. Water injection system hardware is described in section XII.
    6. Exhaust composition analyzed in section IX.
    7. Application data for steam injection must be modeled on a case-by-case basis.
    8. Alternator is sized to utilize full available shaft power from the gas turbine; for operation at power factors other than 0.85 or at reduced kW levels, alternator efficiency must be adjusted from the nominal value of 0.975.
    9. Figures III-2F and III-2G show capability and efficiency of standard and optional oversized generators.
  3. Package Specifications
    1. Gas turbine manufacturer: General Electric, aircraft division.
    2. Gas turbine model: LM2500-33.
    3. Speed: 3600 rpm at 60 Hz standard; 3000 rpm at 50 Hz optional.
    4. Fuel types: gaseous, liquid, or dual fuel.
    5. Starter type: electrohydraulic system standard; pneumatic optional.
    6. Starting time: approximately 5 minutes to sync idle.
    7. Filtration type: 3 stage inertial.
    8. Ambient temperature range: 35 °F to 115 °F.
    9. Sound attenuation: 90 dBA at 1 meter.
    10. Alternator manufacturer: Brush electrical machines ltd. or equal.
    11. Alternator type: 2 pole, cylindrical rotor, air cooled.
    12. Voltage: 13.800 nominal.
    13. Exciter: brushless, PMG.
    14. Control system: electronic, auto/manual, synchronizing.
    15. Switchgear: see section XVI.
  4. Specifications
    1. Frequency: Dual Frequency (50 Hz / 60 Hz)
    2. Generator frame: 13 DAX7-167E