7/14/2019 Frame 6 FA Combined Cycle Plant

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123.6MW 50 Hz GE Frame 6FACombined Cycle Power Plant

Gas TurbineModelPowerHours

Fuel

Steam TurbineTypePowerSpeedHP SteamLP SteamSteam exhausts to a condenser

GEFrame6FA74MW

48,600

Natural Gas

Ansaldo/FrancotosiCondensing53 Mw (nominal)3000 rpm178 tlhr, 1390 psi , 954°F6.43t1hr, 105 psi, 413°F50.8 mm HgA.

• The Power Plant was completed in Nov 1998, with CCGT operation in 2001.

• In Dec 2003 it was acquired by present owner and will operate till 31st March 2011

• The Power Plant is a CCGT plant based on 74MW GE 6FA gas turbine (GT).

• The exhaust gas is the main heat source to its heat recovery steam generator (HRSG).There is a facility to supplementary fire HRSG to give additional steam.

• The condenser is sized to allow full steam turbine bypass with GT operating alone .

• HRSG feeds condensing STG directly coupled to a separate generator giving 53 MW.

• The exhaust steam fram the steam turbine is condensed in a water cooled condenser.

• The GT has dual fuel capability to burn low Btu synthetic gas and natural gas.

• The 6FA GT configuration includes an 18-stage compressor, six combustion chambers, athree-stage turbine and shaft supported on two bearings.

• The GT auxiliaries for the 6FA are located off-base in separate enclosures. The basicsystems include the following: Lubricating oil , Fuel gas, Water injection, Gas control,

Compressor water wash, Atomizing air & Cooling water system.

Heat recovery steam generator

• The HRSG was supplied by NEM of the Netherlands.

• The design is a two pressure, two drum system, producing stearn for a non-reheatcondensing Steam Turbine.

• Supplemenlary firing in the form of (Coen) duct burners is supplied 10 augment steamproduction and increase CCGT electrical output.

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7/14/2019 Frame 6 FA Combined Cycle Plant

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The HRSG comprises HP/LP economizers, evaporators, drums and super-heaters, eachcircuit served by one forced circulation pump used during start up. The HP circuit suppliesthe steam turbine whilst the LP circuit feeds the turbine and condenser air ejectors.Two 100 per cent duty boiler feed-water pumps are provided, one pump being inoperation whilst the second is in standby mode. The feed pump extracts water from thecondensate system and delivers water to the HP steam system via the HP economizers.

le plant is due to be mothballed after 31 " March 2011 and full operating results and majorItage reports are available on site during inspection. Full details are available on request,d inspections can also be arranged. Price can be discussed during site inspection.

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