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