Steam Turbines and electric generators: A steam turbine drive generator, sometimes call as “turbo generators”.A steam turbine is a steam-driven driver. Water is heat at an extremely high temperature to convert it into steam.
Energy create by highly pressurize steam is convert to mechanical energy which rotates the blades in the steam turbine. And a generator is best describe as a machine by which mechanical energy is transform into electrical energy. The coiled wires used in a generator spin inside a magnetic field which causes an electric current to flow through the wire.
steam turbine operate generator are generally high-speed machines. Meanwhile, Most of the electric power in the world is produce by a steam turbine govern power plants.
Steam Turbine Driven Generators can range widely in size. They rarely exceed about 1,500 Megawatts (2 million horsepower) on the top end, and are use on a small scale as well, down to about 500 kW (670 horsepower) on the low end.
Working principle of a Steam Turbines and Electric Generators;
In a steam turbine driven generator, heat is generate from a source. There is a boiler which contains water and the heat is use to convert it into steam which is of high temperature and high pressure.Moreover, Steam production depends on the flow rate and surface area of the heat transfer and the heat of combustion used.
Therefore, This steam from the boiler is push into the turbine through nozzles. Which spins the blades mounted on a shaft. The steam turbine consists of a casing to which stationary blades are fix inside. While a rotor has moving blades on the periphery.
There are two basic types of steam turbines;
- Impulse Turbines: Impulse turbines are simple devices where the steam expands in or through the nozzle, and the heat release through the pressure drop associate with the nozzle or comparable device imparts velocity to the steam. From: Coal-Fired Electricity and Emissions Control, 2018.
- Reaction Turbines: A reaction turbine is construct of rows of fixed blades and rows of moving blades. The fixed blades act as nozzles. The moving blades move as a result of the impulse of steam received (caused by a change in momentum) and also as a result of expansion and acceleration of the steam relative to them.