Francis turbines can be designed for a wide range of heads and flows and are the most common water turbine in use today. The Francis turbine has the characteristics of simple structure, small size, low cost, high efficiency at full capacity (typically over 90%), stable in running, applicable to a wide range of water heads.

The Francis turbine is a type of reaction turbine, a category of turbine in which the working fluid comes to the turbine under immense pressure and the energy is extracted by the turbine blades from the working fluid. A Francis turbine consists of the following main parts: Spiral Casing, Guide or Stay Vanes, Runner Blades, Draft tube, etc.. 

Francis turbines are almost always mounted with the shaft vertical to keep water away from the attached generator and to facilitate installation and maintenance access to it and the turbine.

Wicket gates around the outside of the turbine's rotating runner adjust the water flow rate through the turbine for different water flow rates and power production rates.

In addition to electrical production, Francis turbines may also be used for pumped storage, where a reservoir is filled by the turbine (acting as a pump) driven by the generator acting as a large electrical motor during periods of low power demand, and then reversed and used to generate power during peak demand. These pump storage reservoirs, etc. act as large energy storage sources to store "excess" electrical energy in the form of water in elevated reservoirs. This is one of only a few ways that temporary excess electrical capacity can be stored for later utilization.

Hydro Turbine Generator units & Accessories with Unit Capacity 1 00KW- 1 00MW
Type of Hydro Turbine Generator Units: Francis, Kaplan, Pelton, Turgo, Tubular, Bulb etc.

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      Pelton turbine                       Tubular turbine                Francis turbine       

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