Operation Principle Power Mechine PLTG

component pltgu

gas turbine power plant which serves to change energy contained in fuel into mechanical. Working fluid to rotate the gas turbine hot gas is obtained from the combustion process.

The combustion process requires three main elements:

• Fuel
• Air
• Hot

In the process of combustion in the fuel supplied by fuel pump (fuel oil pump) when used oil fuel, or by a gas compressor when using natural gas fuel. In general, the gas compressor is provided by the gas supplier. Air for combustion is obtained from the main compressor, while the heat to start combustion produced by the ignitor (spark plugs). The combustion process carried out within the Combustion Chamber (combustion chamber). Mechanical energy generated by gas turbines used to turn electric generators, in order to obtain electrical energy. Of course to be running well PLTG operations need to be equipped with assistive devices, controls, instrumentation, protection, and so forth.

The main compressor is a useful axial compressors to supply compressed air into the combustion chamber in accordance with needs. Compressor capacity must be large enough because the more air supply (excess water) for gas turbine can reach 350%. In addition to obtain complete combustion, more air is used for cooling and lower the temperature of combustion gases.

Inlet guide vane (IGV)

In large-capacity compressor, air compressor filled, namely the variable inlet guide vanes mounted IGV, whereas the small-sized compressor is generally installed Fixed Guide vane. Variable IGV function to adjust the volume of compressed air in accordance with the needs or turbine load. At Start Up, IGV also serves to reduce the surge. At the time of stop and during start up, IGV closed (on certain units, the position of IGV 34-48%), then gradually open along with the increasing burden of the turbine. In particular turbine load, IGV fully open (83-92%). During normal stop IGV slowly closed together with lower weights, while the emergency stop, IGV closed simultaneously with the fuel valve closed.

Combustion Chamber is the room where the combustion process. There is a gas turbine having one or two Combustion Chamber are located separately from the turbine casing, but are more often found is to have Combustion Combustion Chamber with some fruit basket, around the side entrance (inlet) turbine. Inside the Combustion Chamber installed the components for the combustion process and its supporting facilities, including:

• Fuel Nozzle
• Combustion Liner
• Transition Piece
• Igniter
• Flame Detector

Gas turbines used to generate mechanical energy from sources of heat energy generated in the combustion process. Furthermore, this mechanical energy will be used to rotate the electric generator either through the intermediary of Load Gear or not, in order to obtain electrical energy. Main parts Gas turbines are:

• Fixed Blade
•  Blade Road
• Exhaust channel
• Channel Air Cooling
• Underpinning
• Auxiallary Gear

Load gear or main gear is the gear lowering speed of rotation is installed between the shaft axis Compressor Turbine Generator. Electricity network in Indonesia. own frequency of 50 Hz, so highest spin generator is 3000 rpm, while the turbine is the 4800 round of RPM or more.