A Turbine which extracts energy from the moving steam and converts it into electrical energy is called a steam turbine.
Types Of Steam Turbine
1. According to the mode of steam action
(i) Impulse Turbine: If the steam available at the inlet has only kinetic energy, the turbine is called an impulse turbine.
(ii) Reaction Turbine: If the steam available at the inlet has kinetic energy as well as pressure energy, the turbine is called a reaction turbine.
2. According to the Direction Of steam Flow
(i) Axial Flow Turbine: if the steam flows through the runner in the direction parallel to the axis of rotation of the runner, the turbine is called an axial flow turbine
(ii) Radial Flow Turbine: If the steam flows through the runner in the radial direction, the turbine is called a radial flow turbine.
3. According to the Exhaust Condition of Steam
(i) Condensing Turbine: A turbine in which the steam is condensed, when it comes out of the turbine is called condensing turbine. It produces large output with a single unit.
Here is the simple arrangement of a single-casing condensing steam turbine. 100% of the steam pass through, spins the turbine and gets condensed.