Electrical Engineering

• Water under pressure contains energy. • Turbines convert the energy in water into rotating mechanical energy. • Impulse turbines convert the kinetic energy of a jet of water to mechanical energy. • Reaction turbines convert potential energy in pressurized water to mechanical energy. Impulse Turbines • Tolerate sand. • Easy to fabricate. • Efficient at wide a range of head and flow. • Anozzle convertspressurised water into a high-speed jet of water. •Pelton –LowFlow –Medium to High Head •Turgo –Medium Flow –Medium to High Head • Crossflow –HighFlow –Low to Medium Head Pelton Turbines    • At least one jet of water strike the buckets at atmospheric pressure. • Maximum jet diameter about 1/3 bucket width. • More jets increase flow and are used at low head.                                                   Pelton Turbine