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Topic: Francis turbine


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 Francis turbine - Wikipedia, the free encyclopedia
Francis turbines are the most common water turbine in use today.
Francis turbines may be designed for a wide range of heads and flows.
Large francis turbines are individually designed for each site to operate at the highest possible efficiency, typically over 90%.
en.wikipedia.org /wiki/Francis_turbine   (581 words)

  
 Water turbine - Wikipedia, the free encyclopedia
The word turbine was coined by the French engineer Claude Bourdin in the early 19th century and is derived from the Latin word for "whirling" or a "vortex".
Prior to hitting the turbine blades, the water's pressure (potential energy) is converted to kinetic energy by a nozzle and focused on the turbine.
Water turbines were developed in the nineteenth century and were widely used for industrial power prior to electrical grids.
en.wikipedia.org /wiki/Water_turbine   (1934 words)

  
 Francisturbinen
Francis turbines are used for heads in the range 30-600 metres.
Like the Kaplan turbine the Francis turbine is an overpressure turbine - the runner is placed in a turbine chamber and is totally surrounded by water.
To avoid cavitation problems at pump operation, the pump turbine has to be placed at a very low level in relation to the tail water level (TWL).
hem.passagen.se /kts/english/turbin/francis/francis.htm   (362 words)

  
 Encyclopedia: Wind turbine
Wind power plants are turbines which use the energy in the motion of the wind to make mechanical energy, which is then converted to electrical energy.
See the broader article on wind power for more on turbine placement and controversy, and in particular see the wind energy section of that article for an understanding of the temporal distribution of wind energy and how that affects wind turbine design.
A wind turbine is a machine for converting the kinetic energy in wind into mechanical energy.
www.nationmaster.com /encyclopedia/Wind-turbine   (606 words)

  
 Mixed-flow turbines (from turbine) --  Britannica Concise Encyclopedia - The online encyclopedia you can trust!
Francis turbines are probably used most extensively because of their wider range of suitable heads, characteristically from three to 600 metres.
Francis turbines reign supreme in the medium-head range of 120 to 300 metres and come in a wide range of designs and sizes.
The first non-reversible Deriaz turbine, capable of producing 22,750 kilowatts with a head of 55 metres, was installed in an underground station at Culligran, Scot., in 1958.
www.britannica.com /ebc/article-45665?tocId=45665   (1453 words)

  
 Lowell National Historical Park - Suffolk Mills Turbine Exhibit
Francis' experiments on turbines led to the mixed-flow reaction turbine, which became the American standard.
Francis continued experimenting with turbines, refining the design of an inward-flow turbine developed by an American named Samuel Howd in 1838.
Whereas breastwheels achieved efficiencies of at most 65%, the turbines tested by Francis and Boyden reached an efficiency of 88%.
www.nps.gov /lowe/suffolk.htm   (1056 words)

  
 turbine on Encyclopedia.com
The three most common types of hydraulic turbine are the Pelton wheel, the Francis turbine, and the Kaplan turbine.
The turbine drives the compressor, which feeds high-pressure air into the combustion chamber; there it is mixed with a fuel and burned, providing high-pressure gases to drive the turbine, the gases expanding until their pressure drops to atmospheric pressure.
The term gas turbine is usually applied to a unit whose essential components are a compressor, a combustion chamber, and a turbine that resembles a steam turbine.
www.encyclopedia.com /html/t1/turbine.asp   (1352 words)

  
 Micro hydropower basic: introduction
Turbines are also divided by their principle way of operating and can be either impulse or reaction turbines.
This kind of propeller turbine is known as a fixed blade axial flow turbine because the pitch angle of the rotor blades cannot be changed.
The major disadvantage of impulse turbines is that they are mostly unsuitable for low-head sites because of their low specific speeds too great an increase in speed would be required of the transmission to enable coupling to a standard alternator.
microhydropower.net /turbines.html   (1906 words)

  
 WaterWheel Factory - Francis Turbine
The Leffel turbine is a variation of the Francis.These turbines are effective on a very wide range of heads and are very much used in spite of their relatively high cost.
Francis Turbines are highly efficient and versatile turbines.
That is the blades of the first stage receive the impulse of the water entering the turbine from the outside, then the water passes down and out the bottom of the turbine and the lower section of the blades are reacted on by the water leaving the turbine.
www.waterwheelfactory.com /francis.htm   (158 words)

  
 Today in Technology History - Sep 18
He also invented a new kind of turbine, known as the "Francis turbine," which is still used today -- including in many of the world's largest hydroelectric power plants.
Francis received several honors during his career, including election to the presidency of the American Society of Civil Engineers.
Francis was just 22 years old when he became the chief engineer in Lowell.
www.tecsoc.org /pubs/history/2002/sep18.htm   (343 words)

  
 Brüel & Kjær Vibro - Francis Turbine
The Francis turbine is a mixed flow type turbine with radial intake and axial discharge.
The size and capacity of some of the recently built Francis turbines is a source of wonder.
This type of turbine is used for heads between 10 and 100 m.
www.bkvibro.com /object.php?obj=bd0029   (103 words)

  
 Turbines
The runner of a Francis turbine is illustrated at the left.
The principle of a power turbine is to direct the incoming water tangentially by stationary vanes, and then to have it pass to the moving runner where it exerts forces on the runner vanes while its pressure decreases from the input head to zero.
By contrast with the impulse turbine, reaction turbines are difficult to understand and analyze, especially the ones usually met with in practice.
www.du.edu /~jcalvert/tech/fluids/turbine.htm   (6486 words)

  
 The educational encyclopedia, physics, hydro energy, hydropower
Water turbine reaction turbines, Francis turbine, Kaplan turbine, Propeller, Bulb Tyson turbine, water wheel turbine, impulse turbines, Pelton impuls turbine, Turgo impulse turbine, Michell-Banki turbine (also known as the Crossflow or Ossberger turbine)
Turbines impulse turbines, the Pelton wheel, reaction turbines, the Lawn Sprinkler
A turbine converts the kinetic energy of falling water into mechanical energy.
users.telenet.be /educypedia/education/physicsenergyhydro.htm   (615 words)

  
 Evaluation of stability of Francis turbine
Once the turbine is adequately described, the prediction of stability is performed using known methods and is done under responsibility of the technical consultant, as the prototype piping system layout is liable to change after the turbine model acceptance tests.
The test laboratory provides a description of the dynamic behavior associated with a particular turbine design in a guaranteed range of operation.
Acceptance tests performed on a scale model in a hydraulic laboratory may provide the necessary informations for a full description of characteristics significant for the stability of operation of the full-size turbine in its piping system.
lmhwww.epfl.ch /Services/ModelTesting/stabilitytest.htm   (665 words)

  
 James B. Francis
He invented the Francis turbine, which was a more efficient successor to the Boyden turbine of Uriah A. Boyden.
James Bicheno Francis (May 18 1815 – September 18 1892) was a British-American engineer.
He was born in Southleigh, Oxfordshire in England and emigrated to the United States at age 18.
www.brainyencyclopedia.com /encyclopedia/j/ja/james_b__francis.html   (163 words)

  
 NUMERICAL INVESTIGATIONS OF TURBULENT FLOW IN WATER TURBINES
The GAMM Francis turbine (figure 4) is used for validation of the CALC-PMB CFD code in the area of hydraulic machinery.
The investigated turbine is a test rig, at GE Energy (Sweden) AB, with a runner diameter of 0.5m (figure 2).
The purpose of the Swedish water turbine program is to increase Swedish water power competence in order to meet the growing water power demand in Sweden and demands on preservation of the environment and efficiency.
www.tfd.chalmers.se /~hani/phdproject/proright.html   (1749 words)

  
 Power Technology - Jyoti - Hydroelectric Generating Sets for Small Hydro Power (SHP) Projects
Manufactured for low and medium head, this turbine can be supplied in two configurations: Monoblock, a two bearing system in which the turbine runner and flywheel are mounted on generator shaft; Dual-block in which turbine and generator have their own bearings thus making it a four bearing systems.
Propeller turbines are used where head and discharge variations are low and Semi Kaplan turbines are used where head and discharge variations are high in comparison to propeller turbines.
Turbine efficiency is high irrespective of load variation.
www.power-technology.com /contractors/powerplant/jyoti2   (678 words)

  
 Turbines
The Francis turbine can be as big as eight hundred megawatts, and operates in ten to two thousand feet.
The difference between the two turbines is that in the pitch of the blades can be changed in the Kaplan in order to improve the results of the process, unlike the Propeller turbine, which is not capable of that.
The height of the water is known as the “head” to drive the turbine.
www.personal.psu.edu /students/c/e/ces957/Turbines.htm   (281 words)

  
 Re: Need good paper for Francis turbine
I'm more interested on the Hydraulic Francis type turbine & is looking for a good survey/ overview of what has been done in this area, particularly for unsteady flow in the Francis turbine & their application etc...
Re: Need good paper for Francis turbine - santosh bhangare, Wed, 13 Oct 2004, 7:36 a.m.
Re: Need good paper for Francis turbine (centaur_ks)
www.cfd-online.com /Forum/main_archive.cgi?read=33227   (172 words)

  
 HYDRO911 Service 1
Installation of two 1 MW Variable Pitch Kaplan Turbines, Generators and all electrical equipment in new powerhouse.
The disassembly and inspection of turbine and generator.
The installation of two upgraded turbines, generators and associated equipment.
www.hydro911.com /Projects.htm   (778 words)

  
 ipedia.com: Pumped storage hydroelectricity Article
Reversible turbine/generator assemblies act as pump and turbine (usually a francis turbine design).
A new concept is wind-pumped water storage where vagaries in wind power can be leveled by using the wind power to fill a reservoir and generating grid power from the reservoir turbines.
When there is higher demand, water is released back into the lower reservoir through a turbine, generating hydroelectricity.
www.ipedia.com /pumped_storage_hydroelectricity.html   (492 words)

  
 Turbines - Turbine Manufacturers, Turbine Factories, Turbine Suppliers, China Turbines
Manufacturer of hydraulic turbines, rubber dipping machinery, polyester cable cords, rubber belts and plastic mold frames.
"Alibaba Turbine" connects you directly to prequalified Turbine manufacturers and exporters from China and around the world.
If you are a supplier, factory, manufacturing company or exporter, and want to have more international Buyers, Join Alibaba now to become a Gold Supplier (for Chinese suppliers), or a TrustPass® Member (for suppliers outside mainland China), and have the opportunity to be included here in the featured supplier list!
hotproducts.alibaba.com /manufacturers-exporters/Turbine.html   (219 words)

  
 Horizontal Francis Turbine
Using a variety of Pro/ENGINEER solutions including Pro/SCANTOOLS, smoother turbine runner and guide vane surfaces were developed.
This design fulfills Jyoti's need for medium-head hydraulic turbines.
Earlier CAD tools took weeks to generate similar designs.
www.ptc.com /award/1999/design_html/368.htm   (83 words)

  
 Send Inquiry or RFQ to Francis Turbine Suppliers & Manufacturers
Send Inquiry or RFQ to Francis Turbine Suppliers and Manufacturers
Elliott designs and manufactures steam turbines, compressors, turbochargers, plant air compressors a...', 'lightyellow', 250)" onMouseout="hidetip()" href="/Elliott_Turbomachinery_Co_Inc/Supplier/sid4609.htm">Elliott Turbomachinery Co., Inc.
www.processregister.com /Francis_Turbine/rfq/pid4173.htm   (276 words)

  
 Almech Francis Turbine Test Rig
Home > Products > Almech Francis Turbine Test Rig
www.indianetzone.com /products/7/689   (9 words)

  
 Turgo turbine - Wikipedia, the free encyclopedia
Turgos operate in a head range where the Francis and Pelton overlap.
The specific speed of Turgo runners is between the Francis and Pelton.
Developed in 1919 by Gilkes as a modification of the Pelton wheel, the Turgo has some advantages over Francis and Pelton designs for certain applications.
en.wikipedia.org /wiki/Turgo_turbine   (371 words)

  
 Lowell Power Canal System and Pawtucket Gatehouse
The Francis turbine, developed from the Howd, is the most widely used water turbine in situations involving medium-head and large-flow rates.
This is the first Francis inward-flow water turbine placed in service and the oldest in existence.
The designer and inventor, James B. Francis (1815-1892), was chief engineer of the proprietors of locks and canals from 1837 to 1885.
www.asme.org /history/roster/H107.html   (135 words)

  
 Tribal Energy Program -FY2003 Projects: Rosebud Sioux Tribe: Project Summary
The Rosebud Sioux Tribe (RST), located in Todd County in south central South Dakota recently installed a single 750kW NEG-Micon wind turbine as part of a DOE grant awarded in the late 1990s.
The property selected is adjacent to, and south of, St. Francis, South Dakota.
The Rosebud Sioux Tribe, located in Todd County in south central South Dakota, recently installed a single 750 kW wind turbine dedicated April 2003.
www.eere.energy.gov /tribalenergy/projects/fy03_rosebud.html   (1298 words)

  
 Water Power
Francis and propellor turbines are the most common reaction type; the Francis design is very similar to the innards of a centrifugal pump.
Water is collected in an intake pipe upstream, travels down to the turbine in plastic pipe, and is forced through one or more nozzles by its own gravity pressure.
Waterwheels--It's important to differentiate between water wheels and water turbines.
www.otherpower.com /otherpower_hydro.html   (872 words)

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