How does a Pelton turbine work?
How does a Pelton turbine work?
Working principle of Pelton turbine is simple. When a high speed water jet injected through a nozzle hits buckets of Pelton wheel; it induces an impulsive force. This force makes the turbine rotate. In short, Pelton turbine transforms kinetic energy of water jet to rotational energy.
What is the equation of power in Pelton turbine?
It is the ratio of power produced by the runner of the turbine to the water-energy supplied to the bucket of the runner. h f = f L V 2 2 g D .
What is CV in Pelton wheel?
(1) Velocity coefficient or velocity ratio (Cv), It is defined as the ratio of the jet velocity and the theoretical velocity of water.
What is Pelton wheel turbine explain its construction and working with a neat sketch?
Pelton Turbine is a Tangential flow impulse turbine in which the pressure energy of water is converted into kinetic energy to form high speed water jet and this jet strikes the wheel tangentially to make it rotate. It is also called as Pelton Wheel.
What is the difference between Pelton and Francis turbine?
Pelton wheel is an impulse turbine where static pressure head of water is converted into mechanical energy. On the other hand, Francis and Kaplan’s turbines are reaction turbines where dynamic pressure head of water is converted into mechanical energy.
Which kind of turbine is a Pelton wheel turbine?
impulse turbine
A Pelton turbine or Pelton wheel is a type of hydro turbine (specifically an impulse turbine) used frequently in hydroelectric plants. These turbines are generally used for sites with heads greater than 300 meters. This type of turbine was created during the gold rush in 1880 by Lester Pelton.
What is the speed range is required for Pelton turbine?
The Pelton wheels with a single jet operate in the specific speed range of 4-16, and therefore the ratio D/d lies between 6 to 26 as given by the Eq. (15.25b). A large value of D/d reduces the rpm as well as the mechanical efficiency of the wheel.
Which is more efficient Pelton or Francis turbine?
The flow of water is axial through the blades. The rotational speed varies from 69.2 to 429 rpm. The required discharge for the working of a Pelton turbine is low. The efficiency of a Francis turbine is about 90%.
How does the energy of a Pelton turbine work?
Pelton Turbine is a Tangential flow impulse turbine in which the pressure energy of water is converted into kinetic energy to form high speed water jet and this jet strikes the wheel tangentially to make it rotate.
Which is lecture on Pelton turbine by Dr shibayan Sarkar?
Lecture on Pelton Turbine Lecture on Pelton Turbine by Dr. Shibayan Sarkar Department of Mechanical Engg Indian Institute of Technology (ISM), Dhanbad Turbines: Pelton wheel (1889) h f h sup power delivered torunner power plied atinlet η= m power at shaftof turbine power delivered torunner η= v sup
What was the power of the Pelton wheel?
Indian Institute of Technology (ISM), Dhanbad Turbines: Pelton wheel (1889) h f h sup power delivered torunner power plied atinlet η= m power at shaftof turbine power delivered torunner
How to calculate the speed of a Pelton runner?
The ideal Pelton runner Absolute velocity from nozzle: nHgv 21 Circumferential speed: nHg v u 2 2 1 2 1 1 Euler`s turbine equation: n uu h Hg vuvu ) ( 2211 11 vvu 02 uv uuu 21 1h 22. The real Pelton runner For a real Pelton runner there will always be losses.