Skip to main content

Turbines

Turbines

Turbines are Hydraulic Machine which converts Mechanical Energy to Electric Energy. This is done by Water power supplied to the runner by water jets.
Turbines work on the principle of momentum in which the water gives the moment and that helps in moving the shaft for the generation of power.

Turbines are divided into 2 types of Reaction and Impulse Turbine.
Pelton Turbine or Pelton wheel is an impulse turbine in which only kinetic energy is available to start rotating the turbine runner.
The other turbines are Kaplan and Francis which are reaction turbines in which water has not only the kinetic energy but also has pressure energy and thus they can work in a low head situation.

Pelton Turbine requires high head such as more than 40 m. Francis runs at medium heat about 15-40 m whereas Kaplan runs at a low head less than 15 m
The different types of turbines
Different Types of Turbines
Pelton Turbine is the Tangential flow Turbine whereas Francis is a Radial inward flow Turbine and Kaplan is an Axial flow Turbine.

 Pelton Turbine is a low discharging turbine with less specific speed. The Francis turbine has a medium discharge and medium speed as compared to both and Kaplan has high discharge capacity and high specific speed.

Pelton wheel has an open casing and the runners are not submerged in water and the Tail Race is below the Turbine. In the case of Kaplan and Francis, the Turbine runner blades are submerged fully while working due to close casing.
Different types of turbines and its details
Types of Turbines
Pelton wheel Turbine has an open casing and thus runs under atmospheric pressure. The Kaplan and Francis Turbine have close casing and thus require and arrangement to discharge water out. This arrangement is called the Draft Tube.

Comments

Popular Post

Timber Buildings !?

Timber Buildings !?  Why do we need a timber building? Yes, timber buildings. As on earth human population is on an exponential rise, many and many people are trying to get home in a city where they have easy excess for the workplace for their own living. In the near future, as the population gets more concentrated in cities more and more structures I mean Tall Structures need to be built. Loading Bearing and Comparison So now architects and builders have opted for old Technic of using timber as a building material eliminating concrete and steel. Yes, it is very hard to find this amount of trees but not impossible. It can be grown and regrown as needed. Many projects have been in progress of this idea and it reduces about 75% of carbon emission as compared to concrete and steel structure.



Using timber coming directly from the forest doesn't have the appropriate strength required for a high rise building. So designers came up with the new idea of CLT i.e. Cross Laminate Timber which …