VER3421 - 4 MW Turbogas + 1 MW Steam Turbine
4 MW gas turbine made Siemens
Boiler for 19 tons/hour of steam at 43 bar
1 MW steam turbine inlet pressure 43 bar, back pressure 7 bar
4000 hours working after overhauling

Main components of the group
Gas turbine
Alternator
Reached coupling between turbine and alternator
Base common turbine alternator and all auxiliary components
Lubrication system
Fuel supply of natural gas
Fuel supply air oxidising
Coverage anti noise
Fire System
System control with PLC

Main characteristics
  • type: combined cogeneration with combination of gas turbine and steam turbine
  • power capacity: 4330 kW + 960 kW = 5290 kW at sea level 5°C with steam injection
  • voltage: 6000 Volt
  • frequency: 50 Hz
  • steam capacity: 15995 t/h total and 11 850 t/h for process
  • steam pressure at process 7 bar approx.
  • steam temperature: 160°C approx
  • energy: methane gas

    List of main equipment
    Item 1 – one gas compressor: capacity: 2146 m3/h
    Item 2 – one gas turbine power unit with:
    . one turbine:
    - manufacturer: RUSTON
    - model: THYPHOON
    - steam:
    . consumption: 2000 kg/h steam injection
    . pressure: 43 bar
    . temperature: 450°C
    . one alternator:
    - manufacturer: GEC Alsthom
    - type: triphases with synchro auto-excitation
    - power: 5219 kWA / 4175 kW
    - voltage: 6000 Volt
    - frequence: 50 Hz
    - speed: 1500 rpm

    Item 3 – one recovery boiler:
    - manufacturer: GALLERI
    - capacity: 19000 kg/h max
    - pressure: 43 bar
    - temperature: 450 °C
    - consumption: - exhaust gas from gas turbine
    - condensate return from de-aerator
    Item 4 – one steam turbine
    - manufacturer: ABB - type: multistage counterpressure - inlet: - pressure: 43 bar - temperature: 450°C - capacity: 13500 kg/h - outlet: - pressure: 7 bar approx - temperature: 160°C - capacity: Item 5 . one alternator:
  • manufacturer: LEROY SOMMER
  • type: LSA 54S5/4P
  • power: 2200 kWA / 1760 kW
  • voltage: 6000 Volt
  • frequence: 50 Hz
  • speed: 1500 rpm

    Item 6 – One de-aerator for return condensate
    . steam . consumption: 1500 kg/h
    . pressure: 7 bar approx.
    . temperature: 160°C approx
    This cogeneration plant is complete with:
  • transformer
  • electrical panels for MV, 6000 Volt
  • electrical panels for LV
  • control panels
  • safety systems
  • valves
  • piping, collectors, supports etc.
  • instrumentation
  • PLC with computer and fully automatic control system including existing software
  • Tanks, chest, cheminees etc.
  • Air compressors, lubrication systems
  • Miscellaneous equipment such as water treatment, chemicals dosing units etc.

    Techincal documentation

    A) Description (mostly in italian language) of the whole original system, including annexes with reference to Gas Turbine performance, new Steam Turbine (ABB) description, new DCS (ABB) description and relevant slides of PC screen.

    B) Drawings
    1 ) General physical layout scheme (two sheets)
    2) Scheme of energy flows of power plant (1 sheet)
    3) Electrical scheme (single - wire) (1 sheet)
    4) Dimensional drawings for building and equipment foundation with actual load

    C) Manuals and details
    1) Electrical scheme of DCS system (in italian) supplied by ABB
    2) User Manual of Gas Turbine (in italian) by EGT (now Siemens)
    3) Maintenance Manual of Gas Turbine (in english) by EGT (now Siemens)
    4) User Manual of Steam Turbine (in italian) by ABB
    5) Drawings of Steam Turbine Components
    6) Drawings of Components and Piping of Boiler (Galleri production)