Tidal Energy

Tidal Energy

1. How it works

   • Underwater Turbines
   • Barrages to block tidal flow, water is forced through turbines

2. Advantages

   • Large variety of possible location
   • No water used up in the process
   • Source is predictable
   • Source is self manageable
   • Easily accessible

3. Disadvantages

   • Expensive construction
   • Environmental impact
     • Disturbs wildlife

4. Examples

   • Severn Barrage
     • 200 yr lifetime
     • Dam containing turbines
     • £20b to constuct
     • 214 40 MW turbines
   • Strangford Lough SeaGen
     • N. Ireland
     • 1.2 MW produced

5. Location Factors

   • Area of ocean with large tidal range
     • Maximise power
     • Estuaries