This work presents the design of the power turbine, its. If the vane moves towards the jet, the water gains speed. Theory a pelton wheel is a tangential impulse turbine, and water strikes its buckets as a free jet atmospheric pressure with a high velocity. Download pelton wheel turbine pdf at the end of the article. Fabrication of pelton wheel turbine mechanical project. Each cad and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or realworld item, product, or good it may purport to portray. 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.
To determine specific speed, ns, for the turbine at design head of 15m 2. In the pelton turbine water jets impacts on the blades of the turbine. Pelton turbines download ebook pdf, epub, tuebl, mobi. As the equations indicate, when a real pelton wheel is working close to maximum efficiency, the fluid flows off the wheel with very little residual velocity. Many earlier variations of impulse turbines existed, but they were less efficient than peltons design. Pelton turbine among different types of impulse turbines, pelton wheel is the only turbine beingused at present. Pelton hydro turbine high performing turbines for heads ranging from 200m to 1,800m based on vast field experience, ge offers vertical shaft machines equipped with multijet collectors for an output up to 350 mw and with runner diameters up to 4m. In the impulse turbines, the total head available is first converted into the kinetic energy. At the outlet of the runner, the water pressure and velocity are very low so almost all the fluid energy has been converted to shaft work. This mechanical work is converted into electrical energy by means of running an electrical. For the love of physics walter lewin may 16, 2011 duration. Turbine lab pelton wheel turbine objective the performance characteristics of.
Pelton wheel is used for high water head and low discharge. Browse our document library, and download ge reference documents gers, fact sheets, images, and more. The ideal pelton runner absolute velocity from nozzle. The most common application of them is the production of energy at hydroelectric plants. I used a bearing of 21 mm external diameter and 12 mm internal diameter so that it can rotate around the shaft. The main difference between a pelton turbine and a turgo turbine is that turgo turbines use single cups instead of double cups on the wheel. Following are the aspects to be considered while designing the pelton wheel turbine. The resulting jet of water is directed tangentially at buckets on the wheel producing impulsive force on them. Effect of the bucket and nozzle dimension on the performance of a. The total drop in pressure of the fluid takes place in stationary nozzles. To obtain characteristics curves graph for qu, pu, efficiency vs nu at full,46and 26 gate openings forgiven pelton wheel. The design process starts with the design of initial dimensions for the runner based on different literatures.
This mechanical work is converted into electrical energy by means of running an electrical generator. The pelton turbine consists of three basic components as shown in figure 1. The pelton wheel extracts energy from the impulse of moving water, as opposed to waters dead weight like the traditional overshot water wheel. Depending on water flow and design, pelton wheels can operate with heads as. Turbines having different types of vanes or buckets or blades mounted on a wheel called runner. The fluid power is converted into kinetic energy in the nozzles. Turgo turbine is an impulsive water turbine and handles flow rates more than the flow rates of pelton turbine handles.
The literature on pelton turbine design available is scarce. However, the most likely approach will be to print this object in plastic such as pla, and create a mold, from which the wheel can be cast in stronger materials such as metal or resin. When a high speed water jet injected through a nozzle hits the buckets of pelton wheel. A wheel power divided by the initial jet power, is the turbine efficiency. Due to its simplicity the pelton turbines is the most widely used turbine in the world. The explanation of the above components is as follows. It was discovered in 188 0 by an american engineer lestera. Pelton turbine evaluation university of iowa college of. See more ideas about water turbine, hydroelectric power and steam turbine. Lecture on pelton turbine indian institute of technology. This is my practcial based semester project and also wite reseach paper on it. Solidworks tutorial how to design a pelton turbine in.
It was invented by lester allan pelton in the 1870s. It is good for applications with high pressure head and low flow. The water turbines converts the energy possesed by the water to mechanical energy. Motor is attached as a prototype there is need to attach real motor beacause it is the real project which convert fluid energy to electrical energy.
In the impulse turbine, all the energy available in the fluid is converted into kinetic energy in a nozzle. This site is like a library, use search box in the widget to get ebook that you want. The pelton wheel is an impulse turbine with tangential flow the water hits its wheel at a tangent. Gilkes are the original designers of the turgo impulse turbine. Learn more about renewable energys efficient hydro turbines. P wheel is the power of the pelton wheel in watts, t jet is the torque delivered to the pelton wheel by the input jet of water in n m and. These pipes are usually made of steel or reinforced concrete. Click download or read online button to get pelton turbines book now. Not a big problem upstream of turbine in reaction turbines high velocities, combined with lower pressures at downstream end need to seat turbines as low as possible to ensure do not get near cavitation pressures no problems in impulse turbines pelton wheel very similar to cavitation in pumps. Draft tube cone runner lower cover upper cover turbine shaft. Many earlier variations of impulse turbines existed, but they were less efficient than pelton s design. Hydraulic turbines and hydroelectric power plants 1. Pdf a reference pelton turbine design researchgate. A pelton wheel impulse turbine is a hydro mechanical energy conversion device which converts gravitational energy of elevated water into mechanical work.
The inlet flow of the jet entering the rotating buckets of a pelton wheel turbine is considered with respect to jet flow impact and the. The water collected in tail race should not submerge the pelton wheel in any case. Turgo turbine turgo impulse turbine 16 models available. Governing mechanism of pelton turbine pdf runner with bucket. The type of plastic used to fabricate this pelton wheel will determine the sizescalepower of the turbine. Even though the pelton turbine is more than a 100yearold invention, there is still a lack of. Me3l fluid mechanic lab manual draft 1 pelton wheel hydraulic turbine.
Design, modeling, and cfd analysis of a micro hydro pelton. The components of pelton wheel turbine are as follows. Looking for downloadable 3d printing models, designs, and cad files. The pelton turbine bought by the museum is an impulse turbine. It has a large wheel or runner that has buckets turbine blades that absorb the energy in the water. Now they are mostly used for electric power generation. Pelton turbine nozzle materials parts that are exposed for water stainless steel c 4r ni 16c 5r ni other parts. A pelton wheel is an impulsetype water turbine invented by lester allan pelton in the 1870s.
Onestage power turbine preliminary design and analysis scielo. Apart from some energy lost to friction can be introduced by a bucket ef. To generate more power, two pelton wheels can be arranged to a single shaft or two water jets can be directed at a time to a single pelton wheel. Kaplan turbine spiral casing runner guide vanes stay vanes draft tube cone. Impulse turbines are ideally suited for high head and relatively low power. Save the files in mrawformat, and choose the highest bit depth, to save the most. Summary of theory pelton wheel turbine is an impulse type of hydraulic turbine. Pelton turbine or pelton wheel, an impulse turbine, is one of the wellknown type of water turbines. Hydroelectric turbines can range up to 900 mw to meet your hydropower needs. 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. Water turbines are mostly found in dams to generate electric power from water potential energy. This paper addresses the design, modeling, and performance analysis of a pelton turbine using cfd for one of the selected micro hydro potential sites in ethiopia to meet the requirements of the energy demands.
The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. Pumps, turbines and pipe networks moment of momentum revisited types of pumps and turbines and uses pumppipe systems, networks 2. Tailrace which is a channel carrying water away from the turbine after the water has worked on the turbines. The runner consists of multiple buckets mounted on a rotating wheel. Pelton wheel turbine is one of the famous turbines which are mostly used for the hydro plants suraj. This is pelton wheel turbine or water turbine supported 5 bar fluid pressure applied. It operates under v ery high heads upto 1800 m and requires comparatively lesser. Fabrication of pelton wheel turbine mechanical project abstract a pelton wheel impulse turbine is a hydro mechanical energy conversion device which converts gravitational energy of elevated water into mechanical work. A water turbine is a rotary machine that converts kinetic energy and potential energy of water into mechanical work water turbines were developed in the 19th century and were widely used for industrial power prior to electrical grids.
1474 904 1093 215 1478 951 879 1273 194 1302 273 1350 1517 1367 57 394 641 116 1434 373 579 1037 864 805 400 811 811 325 239 790 473 1507 1191 548 848 1129 1427 855 524 1160 826 859 412