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Home > Equipments > Gas turbine & spare parts > Technical-Specification-PG6581B-Gas-Turbine


Technical Specification for PG6581B Gas Turbine Generating Set       

1.      Manufacturing
   The gas turbine generating set is produced under Manufacture
   Associate Agreement with GE Company of USA. The compressor- turbine rotor, stator vane of compressor, turbine nozzles, combustion system and Speedtronic Mark V control panel as well as drawings are provided by GE. The generator is licensed from Brush Electrical Machines Ltd. of UK.
2.  Structure
   PG6581B gas turbine generating set is a package unit and can be installed for outdoor operation. It is composed of four blocks i.e. the gas turbine and accessories compartment, control compartment, load gear box enclosure and generator compartment.
   The control panel of gas turbine, control panel and protection panels of generator, motor control center ( M.C.C. ) are located in the control compartment. Neutral point and outgoing leads cabinet are situated at each sides of the generator compartment. The whole unit is furnished with necessary ventilation, lighting and fire-fighting system. There is air conditioners in the control compartment.
1.    Technical Specification.
3.1 Base load ( ISO condition ) ( guaranteed value )
                                      Distillate oil  Natural gas
   Output                   kW          40950       41890
   Heat rate                 kJ/kW.h       11342       11247
   Inlet temp. of turbine       oC            1140        1140       
   Exhaust temperature        oC            544         546
   Exhaust gas flow        kg/h x10x3        526         525
   Note:  above performance is measured at generator terminals and 
   includes allowances for the effects on shaft driven auxiliaries, and
   2.55 in H2O ( 6.48 mbar ) inlet and 2.52 in H2O ( 6.4 mbar ) exhaust
   pressure drops and a NON DLN combustors.  
3.2   Performance correction on the non-ISO conditions.
3.2.1 Altitude correction on curve 416HA662 Rev A.
3.2.2 Ambient temperature correction on curve 544HA876-2 Rev 0 and 544HA875-2Rev 0.
3.2.3 Effect of modulating IGV’s on exhaust temperature and flow on       
     curve 544HA876-3Rev 0.and 544875-3 Rev.0
3.2.4 Humidity correction on curve 498HA697 Rev B.
3.2.5 Effect on pressure drop.
l       Air inlet pressure loss increase every 996 Pa, results an output
   decrease of 1.50%, and a heat rate increase of 0.50%, exhaust  
   temperature increase 1.2 oC.
l       Exhaust pressure loss increase every 996 Pa, results an output decrease of 0.50%, and a heat rate increase of 0.50%, exhaust temperature increase of 1.2 oC.
3.2.6 NOx emission
     168 ppmVD  for natural gas
     327 ppmVD  for distillate oil
3.2.7 Noise
     93 dB (A) at 1m from each machine
3.4 Generator
    Type:                               QFR-38-2
    Output:                              38000 kW 
    Voltage:                              10500 V
    Current:                              2611.8 A
    Frequency:                            50 Hz
    Power factor:                          0.8
    Speed:                                3000 rpm
    Efficiency:                            97.7%
    Protection type:                        IP 44
    Synchronous reactance (saturated):         247%
    Transient reactance (saturated):            22%
    Sub-transient reactance (saturated):         14.8%
    Negative sequence reactance (saturated):     19%
    Short circuit ratio:                     ?.46
    Insulation class:                         F
    Connection:                            Y
    Cooling mode:                         CACW
    Cooling temperature                     32?/DIV>
Note: The output of generator can be matched with the gas turbine output requirement.
Attached Curves:
416HA662 Rev.A  Altitude vs Atmospheric Pressure and Altitude vs
                 Correction Factor for Gas Turbine Output and Fuel
544HA420 Rev.0  Effect of Compressor Inlet Temperature on Output,
                 Heat Rate, Heat Consumption, Exhaust Flow and
                 Exhaust Temperature at Base Load
544HA421 Rev.0  Effect of Inlet Guide Vane on Exhaust Flow and
                Temperature as a Function of Output and  
                Compressor Inlet Temperature
498HA697 Rev.B  Correction to Output and heat Rate for Non-ISO
                 Specific Humidity Conditions

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