New renewable power

1. New renewable power

2. In 1831, Faraday invented the first generator, from that day on, we stepped into a new era, the age of electricity.

3. For 180 years, electric power have greatly improved our life and pushed forward the development of our civilization.

4. We’ve drought our planet

5. New sustainable energy Nuclear power Hydroelectric power

6. Nuclear power But very dangerous Very efficient source of power

7. Fukushima nuclear power disaster

8. Looks like devil’s talons reaching upon the earth

9. Hydroelectric power

10. Another source of hydroelectricity

11. Could be the most powerful untapped green energy on earth Waves and tides contains massive energy They remained an engine in idle

12. Marine Current Turbines Ltd. SeaGen S

13. Works the same way as the wind turbine, but somehow better: Firstly: • Density of sea water: 1.025×10^3kg/m^3 • Density of air: 1.205kg/m3 • Sea water is over 850 times more dense than air, and contains much more connetic energy. ----A wind turbine would need to be almost 30 times the size of Seagen to generate the same amount of power.

14. Secondly: Unlike wind, tidal current slow down for only short, predictable period everyday. There are few energy sources on the planet more dependable. ----If we have a farm of Sea turbine, we’ll be able to tell every minute of everyday, that how much energy it can produce, and how much power would flow into our grid.

15. Stranford narrow

16. Stranford narrow

17. Stranford narrow

18. Each blades is 19 meters in diameter, which can rotate 14 times per minute in Stranford’s tidal currents. When the tide changes, the blades can pivot, capturing the new tide. ----One pair of turbines can generates upto 1.2 MegaW of power, enough to power 1000 homes.

19. The 1.2MW SeaGen S system is proved to be capable of delivering up 6,000MWh per year. This is approximately the rate of energy capture of a 2.4MW wind turbine. Tidal energy is therefore more predictable than wind and potentially twice as productive. ---Tidal energy is very promising, it’s like the beacon of hope in this energy hungry planet.

20. Tide is not the only form of energy that ocean provides us with.Another one… Waves

21. 70% of world’s surface is covered in oceans, and all oceans generates large waves. wherever there’re waves, there’s power available. ----They are everywhere Waves effectively average out the wind that generates them over large areas which results in a high level of consistency compared to wind or solar. Only on very few days per year are waves too weak to generate electricity. ----They are consistant

22. If we can harness them, it may change the way we power our planet. Pelamis

24. The Pelamis machine is made up of tube sections linked by universal joints which allow flexing in two directions. The machine floats semi-submerged on the surface of the water and inherently faces into the direction of the waves. As waves pass down the length of the machine and the sections bend in the water, the movement is converted into electricity via hydraulic power take-off systems housed inside each joint of the machine tubes

25. The Pelamis machine is made up of tube sections linked by universal joints which allow flexing in two directions. The machine floats semi-submerged on the surface of the water and inherently faces into the direction of the waves. As waves pass down the length of the machine and the sections bend in the water, the movement is converted into electricity via hydraulic power take-off systems housed inside each joint of the machine tubes

26. Each tube is 150 meters long and 3.5 meters wide Unit capacity is about 750kW The project in UK employs 7 tubes, generated 5.25 MW

27. Of all the green power ideas, Pelamis may potentially have the widest application. We could have massive farms of it to generate electricity.

28. Of all the green power ideas, Pelamis may potentially have the widest application. We could have massive farms of it to generate electricity.

29. Problems： Durability---storms, continuously big punches. Grid connection---cost, survivability. Companies and scientists are working on that now.

30. The Air Piston • The Tapered Channel Device • The Power Buoy • The Over Topping Device

31. Hopefully one day, we can harness the power of ocean and solve the worlds’ energy crisis. Thank u!