question archive A Pelton wheel is working under a gross head of 400 m
A Pelton wheel is working under a gross head of 400 m
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A Pelton wheel is working under a gross head of 400 m. The water is supplied through penstock of diameter 1m and length 4 km from reservoir to the Pelton wheel. The co-efficient of friction for the penstock is given as 0.008. The jet of water if diameter 150 mm strikes the buckets of the wheel and gets deflected through an angle of 1650, The relative velocity of water at outlet is reduced by 15% due to friction between inside surface of the bucket and water. If the velocity of the buckets is 0.45 times the jet velocity at inlet and mechanical efficiency as 85%, compute:
1) Power given to runner
2) Shaft power
3) Hydraulic efficiency and overall efficiency
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