Ocean Renewable Energies Presentation PDF

‫بسم الله الرحمن الرحیم‬ Physical Oceanography Class Presentation An Introduction to Ocean Renewable Energies Presented by...

‫بسم الله الرحمن الرحیم‬ Physical Oceanography Class Presentation An Introduction to Ocean Renewable Energies Presented by S. Aboozar Tabatabai Rutgers, the State University of New Jersey, Institute of Marine and Coastal Sciences November 2010 Why Ocean? The ocean is the world's largest solar collector and can provide huge amount of energy (kinetic and thermal) which is absolutely clean (zero CO2 emission), sustainable, strategic, and predictable. Changes in salinity, thermal gradients, tidal sea level change and currents, or ocean waves can be used to generate electricity. The number of ocean energy technology concepts has increased to +100 known devices. Available global Ocean Energy resource is in the same order of magnitude of the present electricity production worldwide (even more!). 2 Table compiled from International Energy Agency, Policy Report, 2006 3  Global Marine Renewable Energy Resources (Jun Zhang, 2012)  Wave Energy vs Tidal Energy Waves are produced by winds blowing across the surface of the ocean. However, because waves travel across the ocean, their arrival time at the wave power facility may be more predictable than wind. In contrast, tidal energy, which is driven by the gravitational pull of the moon and sun, is predictable centuries in advance. 5 (Conventional) Tidal Energy Technologies for harnessing energy from tides by building barrage across estuary are well developed, but this type of conversion process could have significant impact on local ecosystem. 6  World’s largest tidal power plant in the Rance estuary near St Malo, France Peak rating of 240 Megawatts, generated by 24 turbines 7 Sihwa is the world’s largest tidal power plant. Sihwa, South Korea It is the world’s largest tidal power plant with a total power of 260 MW and an annual power 8 generation of 543 GWh. Tidal Current Energy Significant number of technologies for harnessing energy from tidal current are being developed worldwide. Some of them are at or near full-scale development and undergoing sea trials. SeaGen 9 10 Rotech Tidal Turbine (RTT) 11 Wave Energy OWC 12 Other wave Devices 13 CETO 14 Salinity Gradient Energy The world's first osmotic plant with capacity of 4 kW was opened by Statkraft on 24 November 2009 in Tofte, Norway 15 Ocean Thermal Energy Conversion (OTEC) 16 Open-cycle OTEC 17 18 19 Thank you for your attention. 20