What is the necessity of compounding of steam turbine?
Subikkumar, CC BY-SA 3.0 <https://creativecommons.org/licenses/by-sa/3.0>, via Wikimedia Commons
1. The compounding of steam turbine means the methods to reduce the speed of rotor
shaft.
2. To increase the thermal efficiency in power plants, high pressure and high temp.
steam is used.
3. If the entire pressure drop (from boiler pressure to condenser pressure)is carried
out one stage only.
4. Then the velocity of steam entering into the turbine will be extremely high.
5. This will make the rotor to run at a very high speed, which is not useful from
practical point of view.
6. Hence it becomes necessary to reduce the rotor speed of turbine by gearing or no.
of stages.
