Bi-directional Turbine triangle-overlay

Pentair Fairbanks Nijhuis

Bi Directional Turbine

Fairbanks Nijhuis’ bi-directional turbine offers the best solution to harness energy from tidal streams in a dam type construction. The patented and proven fish friendly design features a speed controlled direct drive, a permanent magnet generator and a fully reversible impeller to maintain optimal performance in both flow directions during a complete tidal cycle.


  • Proven fish friendly for eel and scaled fish
  • High and proven efficiency in complete tidal cycle
  • Variable speed operation to maintain maximum efficiency during a complete tidal cycle
  • Efficiency is equal in both flow directions (reversal of blades during reversal of tide)
  • The turbine can be operated as pump

Functional description

The BI-DIRECTIONAL Turbine was specifically developed and optimized to generate energy from ultra-low head tidal streams. The proven fish friendly design allows fish to pass the turbine unscathed and improves fish migration. Fairbanks Nijhuis has the most modern design tools and knowledge to develop the best solution for both our customers and the environment.


  • Capacities: 150 - 11,000 m3/h (660-48,431 USGPM)
  • Head: 5-40 MLC (16-131 feet)