Advantage and Disadvantage of Francis Turbine

Advantage and Disadvantage of Francis Turbine Points : Advantage and Disadvantage of Francis Turbine Advantage

1. The difference in operating head can be extra simply controlled in Francis turbine than in Pelton wheel turbine.
2. Ratio of utmost and least operating head can be even be two in case of Francis Turbine.
3. Mechanical efficiency of pelton wheel decrease faster by wear than Francis turbine.
4. Francis turbine variation in operating head can be more simply controlled.
5. No head failure occurs still at low discharge of water.

Disadvantage

1. The water which is not dirt free can cause extremely rapid wear in high head Francis turbine.
2. As spiral casing is stranded, runner is not simply available. Therefore dismantle is hard.
3. The repair and inspection is much harder reasonably.
4. Cavitation is an ever-present hazard.
5. Current losses are certain.