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Topic: Banki turbine

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	Banki turbine Info - Bored Net - Boredom (Site not responding. Last check: 2007-09-10)
		The Banki turbine (also known as the Michell turbine) is a hydropower system similar to an over-shot water-wheel.
		Unlike the water-wheel where the water is captured in buckets, the "middle" of the Banki turbine is left open and the blades that would normally form the walls of the buckets are angled.
		Yet the Banki turbine is often many times more powerful than a traditional wheel, generating the same power as a large Diesel engine.
	www.borednet.com /e/n/encyclopedia/b/ba/banki_turbine.html (200 words)

	Turbine - Wikipedia, the free encyclopedia
		Wind turbines use an airfoil to generate lift from the moving fluid and impart it to the rotor (this is a form of reaction), they also gain some energy from the impulse of the wind, by deflecting it at an angle.
		Gas turbines with multiple stages have the first stage reacting to impulse of the gas flow (because it is inefficient to increase the velocity when it is almost at the speed of sound) and later stages being designed for reaction in the decreasing velocity flow.
		Bladeless turbine uses the boundary layer effect and not a fluid impinging upon the blades as in a conventional turbine.
	en.wikipedia.org /wiki/Turbine (1584 words)

	Banki turbine - Wikipedia, the free encyclopedia
		The Banki turbine (also known as the Michell, Crossflow or Ossberger turbine) is a hydropower system similar in appearance to an over-shot water wheel.
		The "middle" of the Banki turbine is left open and the blades that would normally form the walls of the buckets are angled.
		A home made Banki turbine that has same power as a large Diesel engine is within the means of most small and amateur workshops.
	en.wikipedia.org /wiki/Banki_turbine (316 words)

	Arrangement and method for recovery of energy in a paper machine forming section - Patent 6398913
		The turbine 14 is of a reaction type, preferably a so-called Banki turbine, which is also called a cross-flow turbine due to its function.
		Banki turbine) 14, about 80% of the energy is recovered during the flow into the turbine and about 20% during the flow out of the turbine.
		This cross-flow pattern of the Banki turbine is especially suitable for use in connection with the invention.
	www.freepatentsonline.com /6398913.html (5355 words)

	Micro hydropower basic: introduction (Site not responding. Last check: 2007-09-10)
		Turbines are also divided by their principle way of operating and can be either impulse or reaction turbines.
		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.
		Pelton turbines are not used at lower heads because their rotational speeds becomes very slow and the runner required is very large and unwieldy.
	www.microhydropower.net /turbines.html (1906 words)

	cross flow turbines
		The hub is fixed on the turbine shaft by means of two conic section pliers.
		The turbine shaft revolves on ball bearings external to the turbine case and transmits the motion to the generator shaft by means of a revolution multiplier, which is made up of a couple of pulleys with a cogged driving belt, properly sheltered.
		It consists of the introductor tube, on which the floodgate for plant control is mounted, and the pressure gauge connection.
	www.irem.it /en/Mhp/MHPacc.htm (576 words)

	[No title]
		Turbines' work inserted in mini-hydro is similar to their work in the big hydroelectric improvement - dams.
		This turbine has a drum-shaped runner consisting in two parallel discs connected together near their rims by a curved blades' series.
		In terms of construction, this turbine doesn't have the normal blades; the runner blades are profiled in a complex manner, with a spiral design.
	www.mt.luth.se /hydropower/BEST99/BESTslask/hydrop17/index.htm (1822 words)

	Steam turbines
		There's a high pressure in front of the turbine, while behind it a low pressure is maintained, so there's a pressure gradient: Steam shoots through the turbine to the rear end.
		Steam turbines are operated today of course no longer with normal water vapour only, but depending on the field of application also with other materials, e.g.
		Therefore it is to be paid attention when building steam turbines to a further problem: With the number of passed impellers also the volume increases, which leads to a larger diameter of the impellers.
	library.thinkquest.org /C006011/english/sites/dampfturbine.php3?v=2 (756 words)

	Water Power (Site not responding. Last check: 2007-09-10)
		With impulse turbines, a jet of water is created by the nozzle and squirted onto the wheel.
		Francis and propellor turbines are the most common reaction type; the Francis design is very similar to the innards of a centrifugal pump.
		Home built reaction turbines have been built using centrifugal pumps running in reverse (generating power with moving water instead of using power to move the water).
	www.otherpower.com /otherpower_hydro.html (872 words)

	Hydro (Site not responding. Last check: 2007-09-10)
		Spinning of the turbine is a reaction to the action of the water squirting from the nozzles in the arms of the rotor.
		The significant difference in relation to the Pelton turbine is that Francis (and Kaplan) turbines are of the reaction type, where the runner is completely submerged in water, and both the pressure and the velocity of water decrease from inlet to outlet.
		Turbine manufacturers should be able to provide a close estimate of potential power output for their turbine, given the head and flow conditions at your site.
	www.geocities.com /dieret/re/Hydro/hydro.html (17513 words)

	Banki turbine hydraulic generator,Pelton turbine hydraulic generator
		Compact and lightweight, this hydraulic generator is ideal for seasonal use in isolated houses, alpine pastures and refuges, for UV-ray water cleaning and for remote controls.
		Pelton or Banki turbine with automatic control for flow rate regulation.
		Banki turbine with manual and continuous flow regulation from 0 to 100%.
	www.irem.it /en/Mhp/MHPrange.htm (350 words)

	Energy: Water
		The steel water turbine provided more power at a given site than the waterwheel, and in the U.S. many waterwheel-powered mills were converted to water turbines in the late 19th and early 20th centuries.
		Blades for the small turbines, which cost only a fraction of the cost of similar units in industrialized countries, are cut from steel water pipe and welded in place.
		This is a report of a project "to study alternative water turbines producing 5 kw electric power from an available hydraulic head of 10 m and sufficient amount of flow, and to recommend one for manufacture," for use on Colombian coffee farms.
	www.tekio.net /library/water.html (7937 words)

	Troubled Times: Pelton Wheel
		The Turgo and Pelton Wheel are impulse turbines which use a high head to extract a greater potential energy from the same amount of water.
		Banki (cross flow) turbines can be used for heads as low as 1 metre, up to heads as high as 200 metres.
		The flow of the river rotates the submerged turbine head which is attached to a right angle gear box.
	www.zetatalk.com /energy/tengy03a.htm (560 words)

	Small Water Turbines
		Banki turbine - The Banki turbine (also known as the Michell, Crossflow or Ossberger turbine) is a hydropower system similar in appearance to an over-shot water wheel.
		The development of water-based finishes small water turbines and HVLP spray systems has put spray finishing within the grasp of any small-shop woodworker willing to learn the technique small water turbines and make a modest investment in equipment.
		As a valuable book is to harness the history of the twenty-first century's long-term trends and disadvantages of wind small water turbines for future prosperity that the standard and tomorrow in the advantages held by recent experience.
	www.worldwindtech.com /smallwaterturbines.html (1040 words)

	Water Wheel Engineering (Site not responding. Last check: 2007-09-10)
		The Tyson Turbine is mounted on a floating pontoon platform and is usually moored in mid-stream of a flowing river or creek.
		A sound choice, however, would be the Banki turbine in situations of variable flow and volume because it is readily 'throttlable' to maintain a high conversion efficiency level, even over a 100:1 (or more) ratio of flow or head.
		The Banki turbine consists of a rotor that is not unlike that in a 'Barrel' blower-fan.
	ipc6.permaculturewest.org /ch08/shannon/index.html (3318 words)

	Cross-FlowTurbine
		In fact efficiency is over 80% even with variations in the nominal flow of between 20% and 100% in comparison, the efficiency of a Francis decreases notably as the flow diminishes, substantially reducing the productiveness in the utilization range.
		The standard models in ORENGINE’s normal turbine range are characterized by water flows between 20 and "10-12000" liters per second with heads from 10 to 200 meters, while the maximum unit power does not normally exceed 2,000 kW.
		All turbines are constructed with horizontal axis and the rotor is not subject to axial thrust; in this way, the use of costly and delicate thrust bearings is avoided.
	www.orengine.com /product/crossflw.htm (311 words)

	banki turbine
		Also called a Michell-Bankiturbine a crossflow turbine has a drum-shaped runner consisting of two parallel discs connected together near their rims by a...
		Micro hydro-unit with Pelton turbine of 40 kW.
		Bulletin #25 title "The Banki Crossflow Turbine" is somewhat misleading as it only deals with the "runner" aspect of the turbine.
	bubka.ifrance.com /banki-turbine.html (364 words)

	The educational encyclopedia, physics, hydro energy, hydropower
		A turbine converts the kinetic energy of falling water into mechanical energy.
		Turbines impulse turbines, the Pelton wheel, reaction turbines, the Lawn Sprinkler
		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)
	www.educypedia.be /education/physicsenergyhydro.htm (658 words)

	PowerPedia:Water wheel - PESWiki
		Overshot wheels are the most efficient type; an overshot steel wheel that is also backshot can be more efficient than all but the most advanced and well-constructed turbines.
		Water wheels that are both overshot and backshot are often referred to as pitchback wheels or banki turbines.
		Breastshot wheels are preferred for steady, high-volume flows such as are found on the fall line of the North American East Coast.
	peswiki.com /index.php/PowerPedia:Water_wheel (1715 words)

	Books and construction manuals for renewables
		It is written as a practical handbook for engineers and technicans and draws on the authors practical experience in the lab and at remote village installations.
		It is written for those with engineering or workshop background so that turbines can be made.
		Small Michell (Banki) Turbine: A construction manual : A VITA manual written expressly for DIY build of an open runner crossflow turbine.
	www.powerpal.co.uk /ppbooks.html (264 words)

	DONÁT BÁNKI
		In the middle of the 18th century, János András Segner operated a mill near Göttingen with a device now considered to be the precursor of the turbine.
		Donát Bánki first presented the design of his own turbine in a study written in German in 1917, and later in the Millers' Periodical in Hungarian.
		It is a solution capable mainly of utilizing small hydraulic powers – as it was indicated by Bánki himself as well -, serving principally to replace the paddle wheels of mills or to modernize water mills.
	www.scitech.mtesz.hu /51landmark/banki.htm (2320 words)

	UCM Resita - Experience the difference (Site not responding. Last check: 2007-09-10)
		Runner with a diameter of 2.29 m for a Francis turbine of 36.6 MW.
		Generator for a bulb turbine for HEPP Draganesti on the test stand, 14 MVA; 6.3 kV; 125 rpm.
		Forged shaft for a Kaplan turbine of 24.8 MW.
	www.ucmr.com /galerie-produse.php (361 words)

	Hydro Electric Experiment (Site not responding. Last check: 2007-09-10)
		The idea behind this was to make something along the lines of a "Banki" turbine, which looks a lot like a squirrel cage blower.
		In the Banki turbine, if one was looking at the side, the water should enter below the top (perhaps around 10 O'clock), pass through the middle of the wheel, and exit near the bottom (around 5 O'clock), so the water actually hits the vanes twice.
		This part of the machine is almost identical to the alternator in Hugh Piggott's Axial Flux Wind Turbine plans.
	www.otherpower.com /scotthydro1.html (880 words)

	Ivan's Creek: Low-head hydro-electric power Text - Physics Forums Library
		At that point the turbine's eff curve drops like a rock as it starts to function improperly, and getting those four feet is not only the hardest part of the job, the maintenance requirements afterwards are some of the greatest unknowns.
		01-18-2006, 10:14 PM Btw, the really nice things about the Banki turbine are that it is easy to design and build, it can be made with inexpensive pipe and steel, and the flow is mainly laminar, so the oxygenation should be kept to a minimum.
		The max efficiency of the system occurs at a constant turbine speed and is otherwise independent of the load or the power being generated.
	www.physicsforums.com /archive/index.php/t-107187.html (2471 words)

	Energy: Water
		The Banki Water Turbine, MF 22-500, booklet, 27 pages, by Mockmore and Merryfield of the Engineering Experiment Station, Oregon State University, 1949, $2.00 in U.S., $4.00 foreign, from Engineering Experiment Station, Oregon State University, Corvallis, Oregon 97331, USA.
		Useful notes are included on alternators, transmission drives, dams, and the electronic governor (a device which switches part of the electric current away from the main line—to heat water, for example—when the electric demand falls; this.eliminates the need for an expensive mechanical governor which regulates the amount of water flowing through the turbine).
		Design of Small Water Turbines for Farms and Small Communities, MF 22-505, book (including working drawings for a selected water turbine), 163 pages, by Mohammed Durali, 1976, Technology Adaptation Program, Massachusetts Institute of Technology, out of print.
	www.villageearth.org /atnetwork/atsourcebook/chapters/water.htm (7953 words)

	Cross-FlowTurbine
		Cross Flow turbines manufactured by Orengine are a modern version of the Banki turbine.
		The Cross Flow turbine was invented by an Australian engineer (AGM Michell) and patented by him in 1903.
		The split compartments, in combination with control of the guide vanes, allows the flow capacity to be varied from 15% to 100% whilst still retaining optimum efficiency and reliability.
	www.orengine.net /product/crossflw.htm (238 words)

	Turbomachinery - Figure 2.2 (Site not responding. Last check: 2007-09-10)
		A couple of years after Poncelet introduced his wheel, his contryman Benoit Fourneyron turned it sideways letting water to be admitted over the entire wheel.
		His was the forerunner of modern hydraulic turbines such as Francis and Kaplan's turbine.
		Many ideas of Poncelet's design survive in the Banki turbine, or cross-flow turbine, a favorite of micro-hydro enthusiasts.
	rclsgi.eng.ohio-state.edu /courses/Korpela/images/turbo/poncelet.html (260 words)

	farid's odysseyofthemind (Site not responding. Last check: 2007-09-10)
		A higher turbine location, however, increases the suction that is imparted on the turbine blades by the draft tube.
		It is, in effect, a "leaky" water wheel. Water flowing into the top of the turbine not only spins the wheel by its weight, but as it flows past the blades and into the middle of the turbine, its direction is changed.
		The system is somewhat similar to the Pelton wheel in concept, but requires less engineering in the wheel itself. The Banki turbine has lower efficiency than other turbine designs but enjoys a niche market for low cost and home made installations.
	feeds.feedburner.com /FaridsOdysseyofthemind (1766 words)

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