1. UNDERWATER WINDMILLS HARNESSING THE WORLD’S MARINE CURRENT

2. Tidal Streams – What? Tidal streams Tidal stream turbines The concept
Water being moved by tidal force
Tidal stream turbines
‘Underwater windmills’
The concept
Turbines are driven by kinetic energy of moving water
The condition
Current speed is more than 1 m/s

3. Tidal Stream - Where?
Map of the area between coasts of Ireland and Scotland: areas marked with magenta (in circles) are the place with strong enough currents

4. Tidal Stream – Why?
Harnessing the marine currents help reduce the world’s dependence upon carbon
Tidal flows are predictable; both in terms of timing and in judging the maximum velocity

5. Design Challenges
The challenges to make tidal turbines commercially viable:
The need to create an underwater structure with foundations capable of withstanding extremely hostile conditions
The need to place the systems in the right location
The need to make units efficient and easy to maintain

6. What’s So Special About SeaGen?
The turbine structure acted as its own installation system
The design is quite unusual for a ‘windmill’ : two-bladed rotors
The pitch can be controlled

7. Tidal Power Generation

8. Future Development
SeaGen “U”  a possible answer for gaining a more powerful and viable technology in shallower and in deeper water

9. Environmental Concerns
Marine mammals observers monitore seal movements near the turbine
SeaGen can be shutted down completely in only FIVE seconds

10. the ones who want to make this world greener : GROUP V
Egi Febriansyah
Aida Astuti Cahyaningwidi Rahayu Sutopo
Arifismail Eko Riyanto
Septi Nur Fajarin
Muhammad Chusnul Marom