A Turbine which extracts energy from the moving steam and converts it into electrical energy is called 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 impulse turbine.
(ii) Reaction Turbine: If the steam available at the inlet has kinetic energy as well pressure energy, the turbine is called 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 axial flow turbine
(ii) Radial Flow Turbine: If the steam flows through the runner in the radial direction, the turbine is called 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 single casing condensing steam turbine. 100% of the steam pass through, spins the turbine and gets condensed.