Cross flow Turbine
It is developed by Anthony Michel , in 1903 and is used for low heads (10-70meters)
》As with water wheel, the water is admitted at the turbine's edge. After passing the runner, it leave on the opposite side .
》Going through the runner twice provides additional efficiency.
》The cross-flow turbine is a low speed machine that is well suited for location with a low a head but high flow.
Applications
》The peak efficeincy af a cross-flow trubine is somewhat less then a kaplon ,francis or pelton tirbine
》It has a low price ,and good regulation.
》As water going through the runner twice ,provide additional efficiency.
》Cross-flow turbine are mostly used in mini and micro hydropower units .
》Its good point as when the water leave the runner, it also help clean the runner of small debris and pollution.
》Going through the runner twice provides additional efficiency.
》The cross-flow turbine is a low speed machine that is well suited for location with a low a head but high flow.
Applications
》The peak efficeincy af a cross-flow trubine is somewhat less then a kaplon ,francis or pelton tirbine
》It has a low price ,and good regulation.
》As water going through the runner twice ,provide additional efficiency.
》Cross-flow turbine are mostly used in mini and micro hydropower units .
》Its good point as when the water leave the runner, it also help clean the runner of small debris and pollution.
Reaction turbine
》 In a reaction turbine , forces driving the rotor are achieved by the reaction of an accelerating water flow in the runner while the pressure drops. the reaction principle can be observed in a rotary lawn sprinkler where the emerging jet drive the rotor in the opposite direction .
》In the reaction turbine torque developed by reacting to the fluids pressure. The pressure of the fluid changes as it passes through the turbine rotor blades.
》 In a reaction turbine , forces driving the rotor are achieved by the reaction of an accelerating water flow in the runner while the pressure drops. the reaction principle can be observed in a rotary lawn sprinkler where the emerging jet drive the rotor in the opposite direction .
》In the reaction turbine torque developed by reacting to the fluids pressure. The pressure of the fluid changes as it passes through the turbine rotor blades.
Types of Reaction Turbines
¤ Kaplan Turbine
¤ Francis Turbine
¤ Kinetic Turbine
¤ Kaplan Turbine
¤ Francis Turbine
¤ Kinetic Turbine
》The Kaplan turbine is a water turbine which has adjustable blades and is used for low head and high discharges.
》It was developed in 1913 by the Austrian professor Viktor Kaplan .
》The Kaplan turbine is an inward flow reaction turbine, which means that the working fluid changes pressure as it moves through the turbine and give up its energy .
》The inlet is a scroll-shaped tube that wraps around the turbine's wicket gate. water is directed tangentially through the wicket gate and spiral on to a propeller shaped runner, causing it to spin.
The Kaplan turbine having drop height 10-700m and flow rate 4-55m3/s
》It was developed in 1913 by the Austrian professor Viktor Kaplan .
》The Kaplan turbine is an inward flow reaction turbine, which means that the working fluid changes pressure as it moves through the turbine and give up its energy .
》The inlet is a scroll-shaped tube that wraps around the turbine's wicket gate. water is directed tangentially through the wicket gate and spiral on to a propeller shaped runner, causing it to spin.
The Kaplan turbine having drop height 10-700m and flow rate 4-55m3/s
Applications
》 Kaplan turbine are widely used throughout the world for electrical power production . They cover the lowest head hydro sites and are especially suited for high flow conditions
》Inexpensive micro turbines on the kaplan turbine model are manufactured for individual power production with as little as two feet of head.
》Large Kaplan turbine are individually designed for each site to operate at the highest possible efficiency, typically over 90%. They are very expensive to design , manufacture and install, but operate for decades.
》 Kaplan turbine are widely used throughout the world for electrical power production . They cover the lowest head hydro sites and are especially suited for high flow conditions
》Inexpensive micro turbines on the kaplan turbine model are manufactured for individual power production with as little as two feet of head.
》Large Kaplan turbine are individually designed for each site to operate at the highest possible efficiency, typically over 90%. They are very expensive to design , manufacture and install, but operate for decades.
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