What are the applications of Pelton turbine?
Pelton turbine is used in the hydroelectric power plant where the water available at high head i.e. 150 m to 2000 m or even more. In hydroelectric power plant, it is used to drive the generator attached to it and the generator generates the mechanical energy of the turbine into electrical energy.
What is the principle of Pelton turbine?
Pelton turbine – The basic working principle 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. The rotating shaft runs a generator and produces electricity.
What is the function of Spear Rod?
A spear is provided with in the pen stock and its main function is to increase and decrease the speed of water entering into the turbine. If more water is needed spear move back and allow more to enter into the turbine and if less water is needed spear moves forward to spot excess water from entering in to the turbine.
Which of the following are components of Pelton wheel turbine?
The Components of Pelton Wheel Turbine are as follows.
- Penstock.
- Nozzle and Spear.
- Runner and buckets.
- Casing.
- Breaking Jet.
What is the advantage of Pelton turbine?
Advantages of Pelton Wheel: The Pelton turbine is the most efficient of hydro turbines. It operates with a very flat efficiency curve. Each bucket splits the water jet in half, thus balancing the side-load forces or thrust on the wheel and thus the bearings. It operates on the high head and low discharge.
Why multiple jets are used in Pelton wheel?
Why use multi Why use multi jets? ➢ Usually Pelton turbine is used at high heads ➢ Usually Pelton turbine is used at high heads. ➢ With a decrease in head more water is needed to achieve the same power.
What is the efficiency of Pelton turbine?
Pelton turbines can reach up to 95% efficiency, and even on ‘micro’ scale systems 90% peak efficiency is achievable. Also the efficiency is maintained at a high level even for part-flow rates, mainly because of the low-loss design of the spear-jet.
What is nozzle in Pelton turbine?
A nozzle is a gradually converging short tube which is fitted at the outlet and of the penstock for the purpose of converting the total energy of the flowing water into kinetic energy. Nozzles are used where high velocities of flow are required to be developed.
What are the advantages of Pelton for very high heads?
What are the advantages of reaction turbine over Pelton wheel?
Reaction turbines and water wheels, a type of turbine, are very efficient machines. Because of their unique design, maximum energy is extracted from the flowing stream. This leads to offshoot advantages, such as improved power transfer to pulleys or grinding stones.
What are main characteristics of Pelton wheel?
Pelton wheel is impulse type water turbine which extracts energy from impulse of moving water when the water strikes the pelton cup at very high speed, it induces an impulsive force which makes the turbine rotate. In short the pelton wheel transforms the kinetic energy of water jet into rotational energy.
What is the shape of buckets in Pelton wheel turbine?
Pelton turbine consists of a circular disc on which a number of buckets are evenly spaced around its periphery. Each bucket consists of two symmetrical halves having shape of semi-ellipsoidal cup. These symmetrical parts are divided by a sharp edged ridge called splitter.
How big does a Pelton turbine need to be?
Pelton turbine. Figure 1. A Pelton turbine. A Pelton turbine or Pelton wheel is a type of turbine used frequently in hydroelectric plants. These turbines are generally used for sites with heads greater than 300 meters.
Who was the inventor of the Pelton turbine?
The Pelton is an impulse type water turbine invented by Lester Allan Pelton in the 1870s. Peltons are the preferred turbine for hydro-power where the available water source has relatively high head at low flow rates.
What makes a Pelton impulse turbine so good?
The Pelton Turbine maintains a high efficiency over a wide flow range. Whenever possible two or more jets are specified. This increases the high efficiency flow range. Every Gilkes turbine is selected and optimised to your site conditions in order to provide the best annual energy production figures.
How is the Pelton wheel used in hydroelectric power?
Application of Pelton Wheel: Pelton wheel is the preferred turbine for hydropower when the available water source has a relatively high hydraulic head at low flow rates. In a hydroelectric power plant, This is used to drive the generator of the turbine and that generator generates the mechanical energy of the turbine into electrical energy.