WESTINGHOUSE W-251 B8 30(+)MW GAS TURBINE GENERATOR PACKAGE
Photos
Information
| Manufacture | Westinghouse |
| Year | 1974 |
| Model | W251 B2/B8 |
Description
General Description:
The W251 B2/B8 has run at 100% of design capacity since its installation at the Sanger plant in 1990. The machine was first fired after installation on December 15th, 1990 and went into commercial operation on May 1st, 1991.
The turbine was manufactured in Philadelphia, Pennsylvania, at the Westinghouse plant Lester Branch, and was originally installed in Ecuador at Empresa Electrica Quito SA facility. The machine went into commercial operation in April of 1975. The turbine was operated on liquid fuel while in operation at the Empresa facility. The machine has duel fuel capability but has been operated solely on natural gas he1 since installation at the Sanger facility. All of the auxiliary components were purchased along with the turbine from the plant in Ecuador, with the exception of the generator.
Please see the Scope of Supply attached for a list and details of the auxiliary components.
Since installation at the Sanger facility the machine has been maintained according to the OEM recommendations for maintenance schedule. A yearly combustion inspection was conducted, a hot gas path inspection was done every three years and a major inspection was done every six years. Maintenance records are available for inspection.
The gas turbine has steam injection at a rate of 21,000 lbs/hr at 450PSI and 625°F. for NOx control. The plant has operated as a PURPA cogeneration qualifying facility. The plant has operated as a peaking plant for 15 hours a day excluding weekends and holidays, supplying a nominal 38 MW to the PG&E grid.
Scope of Supply:
W25 1 B2/B8 Combustion Turbine.
Manufacturer: Westinghouse . Lester, Pennsylvania.
Serial #: 17A2231
Date of Manufacture: 1974
Last Major Inspection: March 2003
The unit was overhauled and rebuilt at the Westinghouse plant in Hamilton Ontario prior to installation in 1990. The overhaul included eight new primary and secondary combustion baskets, a new natural gas fuel skid, fuel nozzles and manifold, as well as a new steam injection manifold.
The rotor had a 2A inspection where the disks were unbolted and un-stacked to permit a full NDT inspection.
A new heat exchanger was installed to recover heat rejected from rotor cooling air exhaust heat to preheat the natural gas fuel to approximately 200°F. this resulted in a heat rate efficiency gain of about 1 %%. This also minimized condensation during the injection of steam into the gas manifold.
The inlet plenum was modified and variable inlet guide vanes were installed to permit control of the exhaust temperature, and maintain steam superheating in the HRSG.
The row 1 turbine blades and vane segments were recently upgraded to the B8 design. The transition pieces side seals have also been upgraded to the B8 design in 2003.
Westinghouse/Acec Generator:
Manufacturer: Westinghouse/Acec. Belgium
Order #: lME11070
Type: TWA 840160
Phase: 3
Volts: 13.8kV
Coupling: Wye
Frequency: 60Hz
RPM: 3600
MVA: 32.15
Mega Watts: 27.3
Mega Vars: 16.9
Power factor: 8.5
Stator Amps: 1345
Rotor Amps: 635
Standard: 1345
Max Altitude: 2850
Air Inlet Temperature: 25° C
Rotor Temperature: 125° C
Stator Temperature: 110° C
Date of Manufacture: 1974
Major Overhaul: March - April 2003 during major inspection of the turbine.
Reduction Gearbox:
Manufacturer: Lufkin
Serial #: 17A2231
Date of Manufacture: 1974
Last overhaul: March - April 2003 during major inspection of the turbine.
Exciter: GTG AC Generator
Manufacturer: Westinghouse
Serial #: IS - 84P624
Frame: PMG 16
KVA: 8.4
Volts: 220
Amps: 48.5
Power factor: .95
Phase: 3
Hertz: 420
KW: 185
R P: 3600
Temperature Rise: 60° C
Date of Manufacture: 1974
Last overhaul: March-April 2003 during major inspection of the turbine.
Start Pack:
Manufacturer: Cummins Diesel/ Koenig Engineering
Clutch and Torque converter
Last overhaul: 2004
Inlet Air Cooling (Evaporative Cooler):
Lubricating Oil Cooler:
Manufacturer: Westinghouse
Serial #: 733026-A1
Part #: 711026T09
Date of Manufacture: 1974
Last overhaul: March-April 2003 during major inspection of the turbine.
Air-to-Air Cooler:
Manufacturer: McKenzie - RIS Manufacturing Corp
Serial #: 12157A-1
Dwg #: 241T931001-02
Date of Manufacture: 1974
Last overhaul: March-April 2003 during major inspection of the turbine.
PO #: 51-2-2237801A104
Halon Fire Suppression System:
Manufacturer: Fenwal Inc. Ashland, Massachusetts
Serial #: 12657
Date of Manufacturer: _____
Last overhaul: 2004
Spare 524 gas turbine breaker
Spare torque converter.
The Engineering and Operating console will also be available for sale with the complete package.
Contact Information
| Name | Jeff Siebert |
| siebertjeff@prcenviro.com | |
| Phone | 713-772-9500 |