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Comparative yields of types turbines
a:
Propellers b:  Francis Turbinec:  Turbine Kaplan d:  Turbine Pelton
turbine Pelton(1880)
  
Height drop: 200 - 2000 meters
Flow rate 4 - 15 m3/s
This type of turbine is particularly suitable for high-head applications with variable flow, its yield being insensitive to its variation. Small Pelton turbines can achieve efficiencies of mechanical coupling of 90%
Turbine Francis (1868)
  
Height drop : 10 - 700 mètres
Flow rate 4 - 55 m3/s
As the Kaplan turbine, the Francis turbine is a reaction machine. His wheel is submerged and is using both ,the water velocity (kinetic energy), and difference of pressure .
This type of turbine meets regularly in the old low-head facilities (less than 10 m) where they are generally water chamber, ie without spiral case. Their speeds are very slow and their adaptability to changes in flow being relatively poor, they were replaced by small Kaplan entered the market in the years 1930-1940.
Currently, field of use of Francis is ideally located between 20 and 100 m. To fall over 60 m, they are preferred to Pelton when the flow is important.
The mechanical efficiency of small Francis from developments in the laboratory is approximately 92%
turbine Kaplan(1912)
 
Height drop: 0 - 30 mètres
Flow rate 4 - 350 m3/s
The axial turbines include the Kaplan, bulbs and propellers (jet turbine). The Kaplan turbine is a turbine propeller blades mobile. This allows better operation of the turbine over a wide range of flow rates. Numerous opportunities exist in facilities management of these machines who are not very sensitive to variations in flow. Their level of mechanical efficiency is about 92% in small hydro
an original turbine
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turbine Banki(1903)
  
With MECAFLUX
turbine is chosen by the flow and pressure available, the drop, you can simply evaluate the relations between Powers , Pressure, flow rate, drop height, pressure drop ... with MECAFLUX tab pumps and turbines
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