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A Kaplan turbine is suitable for-
1. High head low discharge
2. High head high discharge
3. Low head low discharge
4. Low head high discharge

1 Answer

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Best answer
Correct Answer - Option 4 : Low head high discharge

Explanation:

Criteria

Pelton Turbine

Francis Turbine

Kaplan turbine

Type

Pelton turbine is an impulse type water turbine

Francis turbine is an inward flow reaction turbine

Kaplan is a propeller-type reaction turbine

Head

It is used for high head ranging from 250 to 1000 m

It is used for medium head ranging from 40 to 600 m

It is used for low head ranging from 10 to 70 m

The direction of flow of water through blades

The flow of water is tangential to the runner. Hence it is also called as tangential flow impulse turbines

The flow of water through the blades combines both radial and axial flow.

The flow of water is axial through the blades

Discharge required

It required low discharge

It required medium discharge

It requires high discharge

Type of energy

It uses kinetic energy and converts into mechanical energy

It converts potential energy into mechanical energy

It uses both kinetic and potential energy and converts to mechanical energy

Efficiency

Its efficiency is about 85%

Its efficiency is about 90%

Its efficiency is about 90%

 

So, for low head and high discharge Kaplan turbine is used

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