A bundle power plant, as furnished for most installations, is comprised of the one-shaft, simple cycle, heavy obligation fuel turbine unit driving a generator. Refinery Fuel and air are used by the fuel turbine unit to produce the shaft horsepower essential to drive certain accessories and ultimately the driven load generator.

About Fuel Turbine Units

When the turbine starting system is actuated and the clutch is engaged, ambient air is drawn by means of the inlet plenum meeting, filtered, then compressed in the 17th stage, axial circulation Compressor. For pulsation safety throughout begin-up, the 11th stage extraction valves are open and the variable inlet information vanes are in the closed position. When the velocity relay corresponding to 95 per cent speed actuates, the eleventh stage extraction bleed valves close mechanically and the variable inlet information vane actuator energizes to open the inlet guide vanes (I.G.V.) to the traditional turbine operating position.
Compressed air from the compressor flows into the annular area surrounding the fourteen combustion chambers, from which it flows into the areas between the outer combustion casings and the combustion liners.

The gasoline nozzles introduce the gasoline into each of the fourteen combustion chambers the place it mixes with the combustion air and is ignited by each (or one, which is ample) of the two spark plugs.

At the instant one or both of the two spark plugs geared up combustion chambers is ignited, the remaining combustion chambers are additionally ignited by crossfire tubes that join the reaction zones of the combustion chambers. After the turbine rotor approximates working speed, combustion chamber strain causes the spark plugs to retract to remove their electrodes from the new flame zone.

The new gases from the combustion chambers broaden into the fourteen separate transition pieces connected to the aft finish of the combustion chamber liners and circulation in the direction of the three stage turbine section of the machine. Each stage consists of a row of fastened nozzles adopted by a row of rotatable turbine buckets. In each nozzle row, the kinetic vitality of the jet is elevated, with an associated strain drop, and in every following row of shifting buckets, a portion of the kinetic power of the jet is absorbed as helpful work on the turbine rotor.

After passing by means of the 3rd stage buckets, the exhaust gases are directed into the exhaust hood and diffuser which incorporates a series of turning vanes to turn the gases from the axial path to a radial direction, thereby minimizing exhaust hood losses. Then, the gases pass into the exhaust plenum.

The resultant shaft rotation is used to turn the generator rotor, and drive sure accessories.

Design Foundation

Easy Cycle Gas Turbine Stream Diagram

The turbine unit is composed of a starting machine, assist methods, an axial-move compressor, combustion system components, a 3-stage turbine. Each compressor and turbine are immediately connected with an in-line, single-shaft rotor supported by two pressure lubricated bearings. The inlet end of the rotor shaft is coupled to an accessory gear having integral shafts that drive the fuel pump, lubrication pump, and other system components.

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