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The Kaplan turbine was an evolution of the Francis turbine. Its invention allowed efficient power production in low-head applications which was not possible with Francis turbines. [2] The head ranges from 10 to 70 metres (33 to 230 ft) and the output ranges from 5 to 200 MW. Runner diameters are between 2 and 11 metres (6 ft 7 in and 36 ft 1 in).
Turbines are sometimes differentiated on the basis of the type of inlet flow, whether the inlet velocity is in axial direction, radial direction or a combination of both. . The Francis turbine is a mixed hydraulic turbine (the inlet velocity has Radial and tangential components) while the Kaplan turbine is an axial hydraulic turbine (the inlet velocity has only axial velocity componen
Rainpower AS is a Norwegian company which develops, designs, manufactures and sells equipment for hydropower electricity generation. The company provides Pelton, Francis, and Kaplan turbines, as well as pump turbines, small hydropower plants, turbine governor, oil pressure systems, valve controllers, exciters, valves, gates, pipes, and other products and services related to the hydropower ...
The company's first major product was an oil cooler for military aircraft. Garrett designed and produced oil coolers for the Douglas DB-7. [9] Boeing's B-17 bombers, credited with substantially tipping the air war in America's and Great Britain's favor over Europe and the Pacific, were outfitted with Garrett intercoolers, as was the B-25. [12]
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After the success of the first Kaplan turbines they started being used worldwide and remain one of the most widely used kinds of water turbines. In 1926 and 1934 Kaplan received honorary doctorates. He died of a stroke in 1934 at Unterach am Attersee, Austria. Kaplan was honored and featured on the 1000 Austrian schilling banknote in 1961.
Kaplan turbine: This turbine is a propeller-type turbine which has adjustable blades to achieve efficiency over a wide range of heads and flows. The Kaplan can be used at low to medium heads (1.5–20 metres) and medium to high flows (3 m 3 /s–30 m 3 /s). For higher flows multiple turbines can be used.
Francis inlet scroll at the Grand Coulee Dam Side-view cutaway of a vertical Francis turbine. Here water enters horizontally in a spiral-shaped pipe (spiral case) wrapped around the outside of the turbine's rotating runner and exits vertically down through the center of the turbine. The Francis turbine is a type of water turbine.