Pelton wheel turbine : Parts, Working, Advantages and Disadvantages
Pelton wheel turbine is from the impulse turbine categories of hydraulic turbine. Pelton turbine was named after its inventor Allan Pelton. There are many other types of impulse turbine but Pelton turbine is the most efficient from all of them.
Parts of Pelton Wheel Turbine
|Pelton Wheel Turbine Diagram
Working of the Pelton wheel turbine
Dam store water at its one side when water level is increased at a specific height then the gates of the dam is open and water start to flow through the pen stock.
Nozzle at the end of the pen stock convert this high speed water into a water jet which on striking the bucket convert its kinetic energy into the rotation energy of the buckets and the runner.
Runner is attached to the shaft which is further attached to a generator. Rotating runner rotates the shaft which rotates the generator.
Advantages of Pelton wheel turbine
- Most efficient of all turbines
- High overall efficiency
- Easy assembly
- Operate at low discharge
- Flat efficiency curve
- Can be operation in silted water
Disadvantages of Pelton wheel turbine
- Decrease in efficiency with time
- Components have large size
- Variation in the operating head is very difficult to control
- The operating head cannot be utilized even when the variation in the tail water level is relatively large when compared to total head