A pelton wheel having semi-circular buckets and working under a head of 120 m is running at 500 r.p.m. The discharge through the nozzle is 40 litre/sec and diameter of the wheel is 50 cm. Find the followings (i) The power available at the nozzle (ii) Hydraulic efficiency of the wheel, if coefficient of velocity is 0.96
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In case of a Pelton turbine, an additional requirement for its operation at the condition of maximum efficiency is that the ration of bucket to initial jet velocity has to be kept at its optimum value of aboutImpulse turbines such as a Pelton wheel or a Turgo work best in relatively small flow situations but a relatively large amount of head. The high pressure water hits the turbine blade, forcing it to change direction so the water doesn't just hit the blades and falls away. 0.46.
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