difference between francis turbine and pelton turbine.

 


Sr

no

criteria

Francis Turbine

Pelton Turbine

1

type

It is reaction turbine

It is impulse turbine

2

use

It is used for medium heads

It is used for high heads

3

Efficiency

It is 90% efficient

It is 85% efficient

4

Specific speed

It has high specific speed

It has low specific speed

5

Type of energy

conversion

It converts potential energy into

Mechanical energy

It converts kinetic energy into

Mechanical energy

6

impeller

Impeller diameter alters from 0.9m

to 10.6m.

Impeller diameter alters from 0.6m

to 0.8m.

7

Power production

It can be used to produce maximum

Power of 800MW

It can be used to produce maximum

Power of 400MW

8

Fluid flow direction

The flowing fluid by the blades has a combination of both axial and radial flow

The fluid flow direction is perpendicular to the impeller

9

speed

Speed varies from 75 rpm to 1000 rpm

Speed varies from 65 rpm to 800 rpm

10

 

the dynamic pressure head of the fluids into mechanical work

the  static pressure head of the fluids into mechanical work

 

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