GE PG 6571-B 40MW 50Hz Dual Fuel Gas Turbine Generator

Fuel:                                                      Liquid/Gas Fired
Rating:                                                  ISO rated @ 39.5MW: (Gas-fired)
Voltage:                                               11.5Kv
Phase:                                                  3
Frequency:                                         50 Hz
pf:                                                          0.8

PERFORMANCE

The performance of the fully serviced and “0” houred Gas turbine is as follows:

Frame 6571:

Output & Heat rate at ISO conditions of 15 Degs. C and 1013mBars (Sea Level)

FUEL (LHV)	OUTPUT (kWs)	Heat Rate (Btu/ Kwhr)
GAS	40,700	10,645
DISTILLATE	40,000	10,700

N.B. Water injection will increase the output figures by approximately 8%.

These performance figures will be obtained when the following operating/ambient conditions apply:

Gas Turbine Unit                              PG 6571
Ambient Temperature                  15°C
Atmospheric Pressure                   1013 mbar (a)
Humidity                                              60%
Inlet Duct Losses                              4 inches WG
Exhaust Duct Losses                       2 inches WG
Fuel                                                       Natural Gas / Distillate to OEM Specification.

This performance is subject to the following:

• Each test to establish the performance figures shall be made when:
• The gas turbine is commissioned and is in a clean and in proper working condition.
• Using a fuel of an acceptable quality as specified above.
• Distillate fuel inlet pressure to the on base liquid fuel flange of 40 to 55 psig.
• The contractor is witness to the test.
• The tests, procedure and method of measurement (including margins to cover errors in observation and measurement) to establish the operating specifications shall be mutually agreed before commencement of the tests. Prior to commencing the actual testing the main contractor will provide specific customized data sheets for recording the unit parameters.
• Method of measurement of ambient air temperature and ambient pressure shall be agreed.
• All performance tests shall, unless otherwise agreed to be carried out immediately following the date that the gas turbine is ready for such tests.

1.     Scope of Supply

Gas turbine Frame 6B complete with the auxiliaries:

• 17 Stage, axial flow, heavy duty compressor with variable guide vanes
• 10 Combustors of reverse flow design each with - 1 fuel nozzle, 2 spark plugs
• 4 UV type flame detectors
• Stage power turbine with horizontal split casing
• Accessory gear box
• Load, accessory and generator couplings
• On base lube oil system
• 2x100% lube oil coolers
• Accessory gear shaft driven gear type main lube oil pump
• 415/480 volts AC motor driven aux. oil pump
• DC motor driven emergency centrifugal oil pump
• Lube oil tank with heater
• 2x100% oil filters
• Lube oil piping complete - pipes, flanges, hardware : (SS               piping after filter)
• GTG drain oil piping - pipes, flanges, hardware
• 2x100% oil de-mister fans & motors
• By-pass valves, re-circulation valves, piping sections, fittings & hardware, local pressure gauges, Return pipes
• Control & protection system
• Shaft driven hydraulic oil Pump
• Cables for interconnection between control panel & GT junction boxes
• Control & hydraulic oil piping with flanges and hardware in stainless steel
• N2 Pressure accumulator in hydraulic oil circuit

Fuel system

• Single mechanical flow divider
• Safety shutdown valve (fuel pressure to open)
• Emergency stop valve
• LP fuel filter, on-line filling line, drain Lines, DP gauge and DP switch, drain lines
• Fuel changeover 3-way valve
• HP filter after fuel injection pump
• Fuel control valve
• Interconnecting piping, fittings, flanges and coupling & hardware
• Fire detection & CO2 system for the skid/container
• Standard fuel piping, fittings, strainers, safety shutdown, venting and gas distribution arrangement
• Liquid fuel safety shutdown - quick shutdown valves, solenoid valves, pressure switches
• Atomizing air system
• Shaft driven Atomizing Air compressor
• Starting compressor driven by diesel engine
• Atomizing air cooler

Drainage system

• Drain piping complete with isolation valves for water including off-line compressor wash water flow.
• Drain piping complete with isolation valves for oil (lube oil/diesel engine fuel and GT fuel)

Air inlet system with filtration system

• Support structure, panel walls, bracing, structural supporting columns, rain hood, ladders, gratings, hand railings,
• Ladder & platform, lifting devices, filter house panels, tube sheets
• Cylindrical & cellulose filter elements
• Clean air plenum
• Control panel, cables, terminal box
• PI and PT, TI and TE at compressor inlet, DPG and DPS across the filter assembly
• Mist separator
• Access doors, internal lighting
• Hardware for filters- element support yokes, retention nuts, washers, gaskets
• Connecting hardware - nuts, bolts, washers, gaskets
• Air inlet duct with silencer & structural support including expansion joints
• Exhaust gas system
• Expansion joint with a mating flange, bolts, nuts
• Distance piece between expansion joint & gas turbine exhaust flange
• Gas turbine acoustic enclosure

Fire protection system (includes generator exciter protection) as per NFPA 12A

• Load cell mounted 25 nos. CO2 cylinders with piping etc. in a container
• Spray nozzles, distribution piping & control system, fittings
• Break switches for CO2 release
• Heat detector type fire detectors in each compartment/ zone

GT starting system

• Diesel engine including fuel supply/ injection system, cooling system, piping spools, interconnecting piping with all fittings, flanges hardware, exhaust silencer
• Valves for various services like water, fuel, lube oil etc.
• Miscellaneous piping, hardware, fittings (valves, flanges)

Generator (air to water cooled) and auxiliaries

• Brush-less excitation System
• General phase & neutral side CTS (for protection, metering & AVR)
• Generator PT (for protection, metering & AVR)
• Generator instrumentation, control & synchronizing panel
• AVR
• AVR manual channel
• Generator protective relays
• Central protection unit
• 87G-generator differential
• 51V-overcurrent volt restraint
• 50-instantaneous over-current
• 59G-over voltage
• 51N-neutral over-current – 95%
• 64G-stator earth fault – 90%
• 46-negative phase sequence
• 40-loss of excitation
• 32-reverse power
• 37- low forward power
• 81-frequency, 2-stage
• 60-voltage balance relay
• 27-under voltage
• 86G-generator lockout relay
• Block differential protection - KBCH130 relay (numerical type) consisting of
• 24- volt/hertz relay
• 87B- generator, generator transformer and unit auxiliary transformer differential
• Other protections not configured in LGPG111 and KBCH130
• 76- excitation over-current
• 60EX- excitation voltage balance
• 60AVR- AVR power supply fault
• 49G- stator over temperature
• 49NGT- NGT over-temperature
• 49ET-excitation transformer over temperature
• 64R- rotor Earth fault
• 21G- back-up impedance relay
• 25- synchro-check relay
• Generator neutral side CTS
• Generator neutral side to neutral cubicle connections
• Load gear box complete

Control & Instrumentation System

• Speedtronic MARK-VI control package with following features:
• Turbine control panel
• Generator control & protection panel
• Generator excitation panel
• Fire protection panel
• Gas detection panel
• 125V DC Ni-Cd batteries and battery charger
• 415Volts MCC (2 In-comers) for GTG auxiliaries (short circuit capacity 50 kA)
• DCDB
• Standard accessories for the above:
• Air conditioning unit, integral cables, connectors, junction boxes, terminals
• Mounting racks, supporting hardware
• UPS
• Operator work station in GT control package

2.     Commissioning Services

Initial start-up, system check-out, initial operations, commissioning and customer personnel training will include the following:

• Service engineers and technicians to oversee and direct the initial start-up, system check-out, field acceptance tests, initial operations and commissioning of the power plant. An hourly rate is included for 1000 hours for this support.
• USP&E Global will provide operations training of a class of up to five (5) customer personnel for the gas turbine generator sets and related equipment. The training will consist of class room and hands-on training for the completed gas turbine generator set installation, excluding the heat recovery units. The operations training course will require five (5) continuous days of dedicated time by customer personnel and will take place during the installation of the turbine generator package.
• USP&E Global will recommend a nominal supply of consumable and replacement components for to purchase concurrently with the manufacture of the equipment, in sufficient quantity for use during the start-up, check-out and commissioning and as projected for one full year of operation. Customer will be expected to purchase these items and to replenish the stock as items may be used or consumed. Note: this paragraph will be superseded by any Comprehensive Service Agreement entered into between the Customer and USP&E Global as desired.
• USP&E Global will provide to customer a supply of components that should be on hand during the first two years of operation of the gas turbine in the event of premature failure of those components. Customer will provide dry, clean storage for such components and make them available to USP&E Global service technicians as required.

3.     Packaged Generator Set Proposal Drawings

The installation drawings for installation of the Gas Turbine power Plants will be provided as part of the engineering works and approval of a purchase agreement.

Major Systems                                 

1.                   P&ID Compressed Air	2.                   P&ID Water Wash
3.                   P&ID Fire Protection	4.                   P&ID Lube Oil System
5.                   P&ID Instrumentation	6.                   P&ID Ventilation
7.                   P&ID Fuel Injection	8.                   Inlet Air Filter
9.                   Air Inlet Plenum	10.               Bellmouth
11.               Enclosure Base	12.               Enclosure Structure
13.               Enclosure Panels	14.               Start System Variable Frequency Drive
15.               Coupling (LOW/HIGH Speed)	16.               MCC
17.               Electrical wiring & trays	18.               High Voltage equipment
19.               Exhaust Silencer, Duct, Expansion Jt.	20.               Engine Mounts
21.               Fabrication Labor	22.               Static Testing

4.     Warranty

Twelve (12) months from date of completion of commissioning, not to exceed eighteen (18) months from shipment. For further details, please see Terms and Conditions of Sale in the addendum to this proposal.

5.     Performance Bonding

USP&E will work with Buyer to determine an appropriate level of performance bonding in order to get this project accomplished. The cost and collateral requirements of such bonding shall be borne equally by both parties.

 

Representative Photos