Evolution of Original Pelton Wheel into Modern Pelton

Evolution of Original Pelton Wheel into Modern Pelton Wheel P M V Subbarao Professor Mechanical Engineering Department Creative Ideas for Quasi-static Execution of Iso-Rothalpy Process. …….

Hydro Power Plant using Pelton Wheel The Pelton wheel was first used at the Mayflower Mine in Nevada City, California in 1878

A Patent on Water Wheel • In 1880 Pelton was granted a patent with the following text. • "Pelton water turbine or wheel is a rotor driven by the impulse of a jet of water upon curved buckets fixed to its periphery; each bucket is divided in half by a splitter edge that divides the water into two streams. The buckets have a two-curved section which completely reverses the direction of the water jet striking them. "

The Original Pelton Wheel : 1880

Meridional View of Original Pelton Wheel

Special Features of Bucket For Circumferential Arrangement

Kinematics of Flow for Actual Bucket in flow plane Euler torque equation:

For flow past a bucket:

Circumferential Arrangement of Buckets in rotational Plane

More Patents for Marginal Modifications • A U. S. patent was issued to Pelton 1880. • Shortly thereafter, the Nevada City Foundry began to manufacture the wheels and ship them all over the world. • In 1888, with partners, Pelton established his own firm, the Pelton Water Wheel Company, in San Francisco. • Many others made subsequent versions of Pelton's original design, with some claiming uniqueness. • Samuel Knight, and others patented significant improvements, including William A. Doble, who became chief engineer of Pelton’s company in 1912. • A complete implementation of Conservation of Rothalpy.

Special Design Features to Minimize Irreversibilities…. .

HEPP with Pelton Wheel

Different Layouts of Pelton Turbine • Arrangement of Jets • Arrangement of Runners • Arrangements of Turbine Shaft

Arrangement of Jets

Arrangement of Runners

The Double Runner Pelton Wheel • The hydro power plant Salido Kecil was built at the beginning of the 20 th century to supply electricity to the local gold mining industry. • It was refurbished in 2007 with modern Hitzinger alternators and ELC. The scheme is operated for supplying a few households and an ice factory. • Its location is in Painan district near Padang city, West Sumatra province of Indonesia. • Design discharge Q = 0. 83 m 3/s • Net head H = 98. 65 m • Electrical Power P = 660 k. W ( 2 x 330 k. W. Double runner Pelton turbines).

Parts of Advanced Pelton Turbine • • The main components of a Pelton turbine are: (i) water distributor and casing, (ii) nozzle and deflector with their operating mechanism, (iii) runner with buckets, (iv) shaft with bearing, (v) auxiliary nozzle. Auxiliary nozzle is used as brake for reducing the speed during shut down. • The runner is located above maximum tail water to permit operation at atmospheric pressure.

Key Parts of Pelton Turbine