Gas Turbine Power Plant Package

The package consists of three major block units – Block 1: Houses the jet with its

accessories

Block 2: Houses the expander turbine, the generator, and the excitation equipment.

Block 3: Houses all the control and starting equipment.

Each block is completely wired and piped and shipped separately to the site. Simple

connections will permit easy and fast assembly of the three blocks into one power

plant.

The power plant is supplied as an outdoor package (ie: no building is required). The

housing will be insulated and proper electric heating units will be installed inside the

housing. The housing of Block No. 1 is also sound treated.

An exhaust silencer will be incorporated in the exhaust stack and an intake silencer

will be connected to the intake flange of Block No. 1. Intake filters will be ahead of the

intake silencers.

Rolls Royce Avon 1533

The expander is an axial impulse type turbine.

The rotor is machined from one solid block. Because of the low heat drop, the blading

consists of a single stage impulse wheel.

The expander casing is of fabricated construction and is horizontally split through the

center line of the rotor. The inlet flange is axially located and the exhaust duct is

mounted for radial upward flow.

The impulse wheel is designed for a 100% admission

The jet engine is designed for a 100% admission.

The jet engine is interconnected with the expander by means of an expansion joint.

The expander rotor rests on two bearings, one plain journal bearing and one

combined journal and thrust bearing. The journal bearings are lined with Babbitt. The

thrust bearing is of the Mitchel type.

A flexible gear type coupling is located between the turbine and the generator.

The generator is of the self-ventilated turbo-type and designed for open air cooling.

Air filters are located in suction ducts on each side of the stator casing. A warm air

circulation system protects the winding from extremely low outside temperature.

Copper is used for the rotor windings. The individual turns of the rotor windings are

insulated by bakelized glass fiber cloth and lodged one above the other in the slots

which are also lined with the same insulation material.

The stator is of fabricated construction. The core is built up of segmented lamination

secured by keys.

The winding is designed as a coil winding. The coiled elements are completely

insulated and tested before being placed in the stator.

To obtain uniform cooling, the entire stator coil is subdivided by a large number of

radial air ducts into narrow stacks of lamination. These stacks are separated one from

the other with spacers.

The exciter is located at the non-driven end of the generator.

The housing consists of a foundation frame, onto which the steel framed aluminum

clad enclosure is located.

The inside of the housing will be clad with sound silencing material, which at the same

time acts as heat insulation.

The jet comes with an integral governing and lubricating oil system which includes all

necessary safety and supervisory devices.

The expander turbine and the generator have a separate lubricating oil system which

also supplies the oil for the speed and load governor as well as to the overspeed trip

mechanism.

The oil is cooled in a radiator located to the side of the main unit. This radiator is fan

cooled.

A DC battery supplies the energy to cool the unit, after a forced shut-down connected

with loss of auxiliary AC power.

The fuel storage and transfer system to a flange connection on the jet block will be

supplied and installed by the purchaser, also the oil return line back to the storage

tank will be installed by the purchaser.

Suitable devices supervise and ensure the fuel oil supply to the jet.

The units are equipped for automatic unattended operation. They can be controlled

either locally or through wires from a remote control panel not more than 1000 feet

away.

The generator can be used as synchronous condenser with the power turbine

windmilling. The change from power production to synchronous condenser operation

can be made from the remote control panel.

The unit can be started without external auxiliary power (“black start”).

inside outdoor cubicle.

the control block for indication and supervision (to be installed by purchaser

in his remote control panel).

pumps, filters and coolers.

i. Ammeter per phase

ii. Voltmeter with changeover switch

iii. KW meter

iv. KVr meter

v. KWh counter

vi. Elapsed time counter

i. Reverse power relay

ii. Overload relay

iii. 3 Maximum current relays

iv. 3 Differential relays

v. Stator ground fault relay

vi. Rotor ground fault relay

exciter, field breaker and discharge resistor automatic regulator Type AB2/1,

field rheostat, adjusting resistor, voltmeter and ammeter.

i. Necessary PT’s and CT’s for the above measuring and protection

equipment. In addition a set of 2000 : 5A CT’s will be provided to

which the purchase will connect the differential protection relays

across the step-up transformer.

i. Wiring inside housing.

ii. Electric motors for all equipment supplied.

iii. Compressor and storage bottles for jet air starter.

control panel.

When operating at 30 degrees F Ambient and 14.7 psia atmospheric pressure and a

power factor of not lower than 8, the output at the generator terminals and the heat

consumption calculated using the generator terminal output and the lower heating

value of the fuel will be as follows:

KW Btu/KWh

Base load duty 8,900 14,850

Peak load duty 12,260 14,360

Maximum peak load duty 13,480 14,300

When burning a light distillate fuel oil per PWA Specification No. 532 (Naphtha) the

“recommended initial hot section inspection intervals” or “times between overhauls”

(TBO) will be as follows:

Base load duty 2000 hrs

Peak load duty 1000 hrs

Maximum peak load duty 15 hrs plus 235 hrs

At peak load rating

The noise level measured at 400 feet will be 65 db or lower.

Run up to firing 20 seconds

Firing to synchronous speed 100 seconds

Synchronizing to full load 60 seconds

Power turbine type PA-13701

Generator type WT-321F

Running Speed, power turbine 3600 RPM

Generator 3600 RPM

Over speed trip setting 3880 RPM

Estimated speed rise on full load rejection 3880 RPM

Estimated speed rise on full load rejection 4030 RPM

Critical speeds, generator 3200 RPM

Power turbine 6000 RPM

No of stages 1 impulse wheel

Blade roots type firtree

Mean diameter of blades 56”

Clear height of blades 5’5”

Tip speed at 3600 RPM 61,800 FPM

Minimum running clearances Arial 5”

Radial 1”

Fuel filter mesh 1.6 mil

Fuel preheater 60 KW

Fuel transfer pump 1.5 KW, 125 V

Fuel transfer pump capacity 1600 lbs/hr

Fuel transfer pump outlet pressure 28 psig (at terminal pt)

Fuel oil stop valve closure time on tripping 5 sec.

Spread governor type Mechanical hydraulic Woodward UG8-PPI

Emergency governor type Mechanical hydraulic

Oil reservoir capacity Approx 500 IG

Bearing oil pressure 22 psig

Cartridge type filter mesh 1 mil

Min oil pump Geared from turbine shat, gear type

Main oil pump discharge pressure 36 psig

Auxiliary oil pump CD motor driven, gear type

Auxiliary oil pump discharge pressure 36 psig

Cooling oil pump CD motor driven gear type

Cooling oil pump capacity 8.5 IGPM

Cooling oil pump discharge pressure 8.5 psig

Ambient rating -50 degrees F to + degrees F

Oil cooler Fan cooled radiator, AC motor driven

Jet starting turbine Air research

Station batter, voltage 125 V

Capacity 510 Ah

Possible number of consecutive starts Summer 5, Winter 3

Roll-O-Matic type or Farr DynaVane type

Overall size, length 98’

Height 11’

Width 10’

Permissible roof loading 66 psf

Heaviest piece to be handled during installation 150,000 lbs (turbine generator

block)

Heaviest piece to be handled during maintenance 59,000 lbs (generator rotor)

Power turbine rotor 44,000 lbs

Turbine cover 7,300 lbs

Total installation 300,000 lbs

Overall length 100 ft

Overall width 12 ft

Height above ground at least 2 ft

Capability 14,000 KVA

Voltage 4,160 V

Direct axis synchronous reactance at rated current 196%

Direct axis transient reactance at rated current 16%

Direct axis sub-transient reactance at rated voltage 10.5%

Negative sequence reactance at rated voltage 10.5%

Zero sequence reactance at rated current 5%

Short circuit ratio .6

Rated temperature rise of stator winding conductors BS 2613

Insulation type and class Micafolium, Class B

Fans mounted on the generator shaft will pull air from outside through filters, push it

through the generator and exhaust upwards through the roof of the enclosure. A

thermostatically controlled louver system will re-circulate hot air in winter time.

Field voltage, no load, cold resistance 38 V

Field voltage, rated load, .85 pf 125 V

Field current, rated load, .85 pf 260 V

Exciter capacity in KW 88 KW

Exciter rated voltage 160 V

The excitation system will be suitable for parallel operation of the generator with other

generators.

The excitation system is suitable for synchronous condenser operation. In this mode

of operation the power turbine will windmill. The respective capabilities as

synchronous condenser are:

Inductive 10,000 KVA

Capacitive 8,200 KVA