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Ocean energy

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ocean energy

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Ocean energy

  1. 1. Ocean EnergyOcean Energy ZAKIR HUSAIN COLLEGE OF ENGG. & TECH. PRESENTED BY MOHD AMIR A3MA-31 13MEB122 GG0768 11
  2. 2. IntroductionIntroduction • The ocean has a tremendous amount energy in the formThe ocean has a tremendous amount energy in the form RENEWABLE ENERGY around the world.RENEWABLE ENERGY around the world. • Ocean energy or ocean power (or marine , hydrokineticOcean energy or ocean power (or marine , hydrokinetic energy)energy) refers to energy carried by ocean waves , tides , salinity andrefers to energy carried by ocean waves , tides , salinity and ocean temperature difference.ocean temperature difference. • The ocean have both Wave power i.e. power from surfaceThe ocean have both Wave power i.e. power from surface waves & Tidal energy i.e. kinetic energy of large movingwaves & Tidal energy i.e. kinetic energy of large moving water body.water body. 22
  3. 3. GLOBAL POTENTIALGLOBAL POTENTIAL • Potential to develop 20,000 – 80,000 terawatt-hoursPotential to develop 20,000 – 80,000 terawatt-hours ( TWh ) of electricity generated by changes in ocean( TWh ) of electricity generated by changes in ocean temperatures , salt content , movements of tides ,temperatures , salt content , movements of tides , currents , waves & swells.currents , waves & swells. • Indonesia is a country with three quarter of the area is ocean, has 49 GW recognized potential ocean energy and has 727 GW theoretical potential ocean energy. 33
  4. 4. Global PotentialGlobal Potential Global potential Form Annual generation Tidal energy >300 TWh Ocean current power >800 TWh Osmotic power (Salinity gradient) 2,000 TWh Ocean thermal energy  (Thermal gradient) 10,000 TWh Wave energy 8,000–80,000 TWh Source: IEA-OES, Annual Report 2007[3] 44
  5. 5. Different Form of Ocean EnergyDifferent Form of Ocean Energy 1.1. Ocean Current power ,Ocean Current power , 2.2. Osmotic Power ,Osmotic Power , 3.3. Tidal energy ,Tidal energy , 4.4. Ocean Thermal energy ,Ocean Thermal energy , 5.5. Wave EnergyWave Energy 55
  6. 6. Ocean Current PowerOcean Current Power • Marine current power is the kinetic energy of ocean currents. • Strong ocean currents are generated from a combination of temperature, wind, salinity, and the rotation of the earth. • It is understudy to develop a ocean current power plant. Japan is building underwater kites to harness the current energy . 66
  7. 7. OCEAN CURRENT ENERGYOCEAN CURRENT ENERGY 77 underwater kites
  8. 8. Osmotic PowerOsmotic Power • Osmotic power, salinity gradient power is the energy available from the difference in the salt concentration between seawater and river water. • There are two methods for using this energy 1.1.Reverse Electro-dialysis ,Reverse Electro-dialysis , 2.2.Pressure retarded Osmosis.Pressure retarded Osmosis. 88
  9. 9. PressurePressure Retarded OsmosisRetarded Osmosis 99 In this method, seawater is pumped into a pressure chamber that is at a pressure lower than the difference between the pressures of saline water and fresh water. Freshwater is also pumped into the pressure chamber through a membrane, which increase both the volume and pressure of the chamber. As the pressure differences are compensated, a turbine is spun, providing kinetic energy.  Statkraft has built the world's first prototype PRO power plant on the Oslo fjord on November 24, 2009.
  10. 10. Tidal EnergyTidal Energy • Tidal energy is the kinetic energy of large moving water body. It generate maily due to gravitational force of moon. • More predictable than wind energy and solar power. • Tidal energy can be utilised by these methods I. Tidal stream generators, II.Tidal barrage, III.Tidal lagoon, IV.Dynamic Tidal power 1010
  11. 11. Tidal Stream GeneratorTidal Stream Generator Use kinetic energy of water to drive turbineUse kinetic energy of water to drive turbine 1111 The world's first commercial-scale and grid-connected tidal stream generator – SeaGen – in Strangford Lough.[10]The strong wake shows the power in the tidal current.
  12. 12. Tidal EnergyTidal Energy Tidal BarrageTidal Barrage Tidal barrage use potential energy difference betweenTidal barrage use potential energy difference between High TideHigh Tide && Low tide.Low tide. 1212
  13. 13. Ocean Thermal EnergyOcean Thermal Energy • Ocean are the largest solar energy collector.Ocean are the largest solar energy collector. • The OTEC process uses temperature differenceThe OTEC process uses temperature difference between deep cold water and hot surface water tobetween deep cold water and hot surface water to generate electricity.generate electricity. • There are two types of OTEC plantThere are two types of OTEC plant 1.1.Open cycleOpen cycle 2.2.Closed cycleClosed cycle 1313
  14. 14. Closed-loop OTECClosed-loop OTEC • Closed cycle system use fluid with a low boiling point, suchClosed cycle system use fluid with a low boiling point, such as ammonia to power a turbine to generate electricity.as ammonia to power a turbine to generate electricity.
  15. 15. Open-loop OTEC cycleOpen-loop OTEC cycle • The Claude Plant used an open cycle in which seawater itself playsThe Claude Plant used an open cycle in which seawater itself plays the multiple role of heat source, working fluid, coolant, & heat sink.the multiple role of heat source, working fluid, coolant, & heat sink.
  16. 16. WAVE POWERWAVE POWER • Solar energy from the sun creates temperature differentials that result in wind. The interaction between wind and the surface of water creates waves . 1616 Pelamis Wave Energy Converter on site at the European Marine Energy Centre (EMEC), in 2008
  17. 17. SURFACE ATTENUTORSURFACE ATTENUTOR • These devices with multiple floating segments connected to one another and are oriented perpendicular to incoming waves. A flexing motion is created by swells that drive hydraulic pumps to generate electricity. 1717
  18. 18. ADVANTAGESADVANTAGES • Does not produce green houses gases and wasteDoes not produce green houses gases and waste product.product. • Does not require any fuel,Does not require any fuel, • Once the technology is built , it does not require extraOnce the technology is built , it does not require extra cost,cost, • It does not have a big environmental impact.It does not have a big environmental impact. 1818
  19. 19. DISADVANTAGESDISADVANTAGES • Electricity generation cost is more,Electricity generation cost is more, • No energy company will put money because theseNo energy company will put money because these technologies have been tested for small scale.technologies have been tested for small scale. • Localised marine eco system will be affected.Localised marine eco system will be affected. • Frozen ocean areas limit locations for machinery.Frozen ocean areas limit locations for machinery. 1919
  20. 20. REFERENCESREFERENCES • http://oceantidalenergy84.weebly.com/advantagesdisadvhttp://oceantidalenergy84.weebly.com/advantagesdisadv antages.htmlantages.html • http://oceanenergy.epri.com/http://oceanenergy.epri.com/ • http://www.conserve-energy-http://www.conserve-energy- future.com/Advantages_Disadvantages_WaveEnergy.phfuture.com/Advantages_Disadvantages_WaveEnergy.ph pp • https://en.wikipedia.org/wiki/Marine_energyhttps://en.wikipedia.org/wiki/Marine_energy 2020
  21. 21. Thank youThank you 2121

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