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GE, RLM 2500PE, Combined Cycle Cogeneration Plant, 27 MW, Natural Gas

Description

  1. Overview
    1. Application: Combined cycle cogeneration plant with gas turbine and back pressure steam turbine
    2. Type: Gas turbine GE RLM 2500PE and Alstom steam turbine
    3. Power: 21.90 MW ISO (gas turbine), 4.95 MW (steam turbine), total 26.95 MW
    4. Fuel: Natural gas
    5. Year of commissioning: Gas turbine in 1994, steam turbine in 1996
    6. Last maintenance: Gas turbine—May 2008, overhaul at 111,000 h; May 2009 semiannual inspection at 120,000 h
  2. Gas Turbine Package
    1. Core engine
    2. Gas generator: Air inlet casing, compressor rotor, compressor stator with variable guide vanes, combustion system
    3. Power turbine: Hot gas interduct, power turbine rotor, power turbine stator/output shaft drive, exhaust outlet casing
    4. Engine bearing temperature instrumentation
    5. Engine bearing vibration instrumentation
    6. Base plate
    7. Start system – hydraulic motor and pump, AC electric motor driven
    8. Gears, couplings, and guards
    9. Main speed reducing gearbox – epicyclic, including all auxiliaries
    10. Lubricating oil system, including main, auxiliary and emergency oil pumps, tanks, oil, cooler, filters, etc.
    11. Gas fuel system including conduit, fuel flow control system, rapid-acting gas shut-off valves and block and vent valves
    12. Acoustic enclosure ventilation system – 80 dBA at 1 m
    13. Gas detection system
    14. Fire protection system
    15. Fire fighting system
    16. Combustion air inlet system, including ducts, silencers, and filters
    17. Combustion exhaust system, including diffuser and flexible joints
    18. Package auxiliaries, including turbine compressor cleaning system
    19. Electrical system: Motor control center – off package, batteries and battery charger
    20. Control system: Unit control system – Rustronic MKII, generator control system
    21. Spare parts – list under request
  3. Generator
    1. Included with gas turbine package
  4. Steam Turbine
    1. Manufacturer: Alstom
    2. Power output: 4,950 MW
    3. Steam flow: 42 t/h
    4. Steam conditions: 60 bar, 450 °C
    5. Steam output: 6 / 8 / 10 bar
    6. Total running hours: 114,000 h
    7. Alternator: ABB type WG 710, 1500 rpm, 50 Hz, 6.3 V, PF 0.8, 6,200 kVA
    8. Scope of supply: Steam turbine, generator, gearbox supplied by Flender-Graffenstaden, oil system (oil tank 5000 L, oil vapor suction unit, main, auxiliary and emergency oil pumps, oil cooler, double oil filter), injection cooling station (auxiliary oil pump, emergency, gas generator)
  5. Heat Recovery Steam Generator
    1. Manufacturer: Balcke-Durr
    2. Year: 1994, modified in 2000 by DBEMA
    3. Natural water circulation
    4. Location outdoors
    5. Steam flow (without supplementary firing): 31 t/h
    6. Steam flow (with maximum supplementary firing): 49 t/h
    7. Steam pressure: 60.0 bar (g)
    8. Design steam pressure: 68.0 bar (g)
    9. Steam temperature: 450 °C
    10. Feed stack water temperature: 88 to 105 °C
    11. Burner manufacturer: Eclipse VAI C-8640
    12. Burner power: 13 MW
    13. Range: 1:10
    14. Scope of supply: Pressure parts (HP final superheater, HP primary superheater, HP evaporator, HP economizer, water preheater), ducts and stacks, damper supplied by Stejasa, burner supplied by Eclipse, deaerator and feedwater tank 35 m³, feedwater pumps 2 units supplied by Sulzer (58.7 m³/778 m), chemical dosing system, blowdown system 1 m³ tank, BMS and control system
  6. Electrical and Control System
    1. Outdoor substation 50 kV
    2. Power transformers and auxiliary services transformer
    3. Gas turbine: 30 MVA, 50 kV - 6.3 kV, YNd 11, manufacturer OASA
    4. Steam turbine: 6.5 MVA, 50 kV – 6.3 kV, Dyn11, manufacturer OASA
    5. For auxiliaries: 2 MVA, 6.3 kV – 0.4 kV, Dyn11, manufacturer OASA
    6. MV switchgears
    7. Motor control system
    8. Protections cabinet
    9. MV cables between switchgears, generators, and power transformers
  7. Natural Gas Station
    1. Max flow: 7,000 Nm³/h
    2. Inlet pressure: 32 bar
    3. Outlet pressure: 32 bar for GT, 2.5 bar for burner
  8. Water Treatment
    1. Demineralized water plant
    2. Capacity: 690 m³/24 hours
    3. Ion-exchange, Dow UPCORE system
    4. Neutralization tank: 40 m³