Jenbacher JGS420GS Generator Set

Design Basis

Design, Engineering, Procurement, Supervision of Installation, and Commission by Nanjing Turbine Power Station Engineering Design Institute (NTCE) of Nanjing China.

1- Boiler system. 2- Steam Turbine system. 3- Generator system. 4- Fuel Conveying system. 5- Lime stone power injection system. 6- Ash & slag handling system. 7- Chemical water treatment system. 8- Water supply & drainage system of power plant. 9- Firefighting system of power plant. 10- Electrical system Control system Ventilation and air conditioning system.

Main Technical Index  

Total occupied coverage                                                         2.4hm2

Coverage area of each Kw                                                     2m2 /kW

Building coefficient                                                                21%

Site utilization coefficient                                                      38.5 %

Gross Power generation                                                          6MW

Auxiliary load                                                                         0/78MW

Net Power supply                                                                    5.22 MW

Gross heat rate                                                                                    3528.7kcal/kwh

Thermal efficiency for gross power gene                               24.37%

Net heat Rate                                                                          4052.5kcal/kwh

Thermal efficiency for net power supply                               21.22%

Auxiliary load ratio                                                                 13 %

Plant total thermal efficiency (NET)                                      21.2%

Specification of main equipment

Boiler:

Qty                                                                                          1 set

Model                                                                                      UG-35/3.82

Rated output                                                                           35t/h

Main steam temperature                                                         450℃

Main steam pressure                                                               3.82MPa

Feed water temperature                                                          150℃

Flue gas exhaust temperature                                                 145℃

Boiler blowdown rate                                                             2%

Fuel                                                                                         Indonesian/South African imported

Design efficiency                                                                    89%

Turbine

Qty                                                                                          1 set

Model                                                                                      N6-3.43 M

Rated power                                                                            6 MW

Rated rotation speed                                                               3000r/min

Rotation direction                                                                   Clockwise direction (by viewing from turbine to generator)

Initial Steam inlet pressure                                                     3.43MPa（a）

Initial Steam inlet temperature                                                435℃

Rated initial steam volume                                                     29t/h

Rated steam rate                                                                      4.672kg/kWh

Rated heat rate                                                                        12406kJ/kWh

Heat recovery system                                                  1 LP Heater +1 Deaerator + 1 HP Heater

Circulating cooling water inlet temperature                           30℃

Rated steam exhaust pressure                                                 0.0084 MPa (a）

Unit vibration value                                                                ＜ 0.03mm

Noise Level                                                                             :＜ 85db(A)

Governing mode                                                                       DEH (Digital- Electro–Hydraulic)

Generator

Qtya                                                                                        1 set

Model                                                                                      QFW-6.8-2

Rated power                                                                            6.8MW

Rated voltage                                                                          11kV

Rated frequency                                                                      50 HZ

Rated rotation speed                                                               3000r/min

Rated current                                                                          446A

Power factor                                                                           0.8

Efficiency                                                                               97%

Cooling mode                                                                         air-cooled

Rotation direction                                                  Clockwise direction by viewing from the turbine end

level (of stator or rotor)                                                           F level

Overload ability                                                                      10%

Excitation mode                                                                      AC brushless excitation