Tender Document for Repowering Project of Ghorasal 3rd Unit - BPDB
Tender Document for Repowering Project of Ghorasal 3rd Unit - BPDB
Tender Document for Repowering Project of Ghorasal 3rd Unit - BPDB
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2.6.11 Valves<br />
2.6.12 Generator<br />
Delivery pressure 1.61-2.13 kg/cm 2<br />
RPM 485<br />
Steam turbine controlled by main stop valves, regulating valves etc. different<br />
type valves associated with steam turbine <strong>for</strong> different operation. <strong>Tender</strong>er<br />
have to renovate or replace all required valves including its operating mechanism<br />
<strong>for</strong> full operation.<br />
Generator connected with turbine in a single shaft. <strong>Tender</strong>er have to renovate<br />
steam Generator including its accessories <strong>for</strong> full operation.<br />
Steam turbine generator Description:<br />
Type TΓB-200 MT3<br />
Power - 247 MVA<br />
Active power- 210 MW<br />
Power factor- 0.85<br />
Speed <strong>of</strong> rotation - 3000 RPM<br />
Frequency- 50 Hzs<br />
No <strong>of</strong> phases 3<br />
Phase connection (Y) star<br />
Efficiency 98.45%<br />
Stator voltage- 15.75 KV ± 5%<br />
Stator Current- 9060 A<br />
Rotor Current(estimated)- 1950 A<br />
Excitation voltage 430 V<br />
Hydrogen pressure 3 Kg/cm 2<br />
H 2 purity- 98 %<br />
Static over load 1.71<br />
Short ckt ratio 0.52<br />
Main Characteristics <strong>of</strong> Cooling Media<br />
Hydrogen gas<br />
H 2 pressure -3 Kg/cm 2 ±0.2<br />
H 2 purity- not less than 97 %<br />
H 2 Temperature at cooler outlet 41 0 C<br />
Water inlet <strong>of</strong> gas cooler<br />
Flow rate 400 m 3 /Hr<br />
Temperature <strong>of</strong> cooling water=34 0 C<br />
Pressure <strong>of</strong> cooling water 3.5 Kg/cm 2<br />
Water pressure loss in gas cooler 0.8 Kg/cm 2<br />
Cooling water <strong>for</strong> stator winding 1 st ckt (Technical)<br />
Flow rate 200 m 3 /Hr<br />
Temperature <strong>of</strong> cooling water= 34 0 C<br />
Pressure <strong>of</strong> cooling water not more than 6 Kg/cm 2<br />
Cooling water <strong>for</strong> stator winding(distillate)<br />
Flow rate 45±4<br />
m 3 /Hr<br />
Temperature <strong>of</strong> cooling water=41 0 C<br />
Pressure <strong>of</strong> cooling water inlet 2.8 Kg/cm 2<br />
Pressure <strong>of</strong> cooling water outlet 0.5 -1 Kg/cm 2<br />
Electrical resistivity <strong>of</strong> distillate 75 KΩ or more<br />
at 41 0 C<br />
Re-Powering <strong>Ghorasal</strong> 210 MW 3 rd <strong>Unit</strong> (Vol-2A <strong>of</strong> 2) 18
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