Kaplan hydraulic turbine
Alstom Power Generation

Alstom's Kaplan turbines in operation cover low head applications ranging from about 15 to 50 meters, and outputs up to 130 MW.

Thanks to their double regulation they provide high efficiency over a broad range of head and discharge/output.

Compared to Bulbs, their vertical configuration allows larger runner diameters (above 10 m) permitting to increase the unit power and thus minimising the number of units

Kaplan turbines have the same challenge as Bulb turbines: both are often installed on large rivers where fish ladders allow the fish to migrate upstream for spawning. Our Kaplan turbines have a "fish friendly" design improving the survival of this species while migrating.

Another key environmental concern is accidental water pollution though oil spill. To prevent this, we are experienced with water-lubricated bearings and water filled hubs.