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wave energy
- 1. Wave Energy Prepared by: AhmedAli Peter Samir Ahmed Reda Zaki Mustafa Abbas Supervised By: Dr. Mohamed El- Ghandour Port Said University Faculty of Engineering Mechanical engineering department Energy Resources MPE-331
- 2. contents • Introduction • Advantage& disadvantage • Types of systems • Devices • Situation of world • Situation of Egypt • Challenges • References
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- 4. Wave energy • Waves are generatedby the winds as it blows across the sea surface. • Wave energy is sometimes confused with tidal energy, which is quite different. • Waves travel far distances across oceans at great speed.
- 5. History The firstknown patent to use energy from ocean waves dates back to 1799 and was filed in Paris by Girard and his son. An early application of wave power was a device constructed around 1910 . From 1855 to 1973 there were already 340 patents filed in the UK alone. A renewed interest in wave energy was motivated by the oil crisis in 1973. In the 1980s, a few first-generation prototypes were tested at sea. In 2008, the first experimental wave farm was opened in Portugal, Its capacity is 2.25 MW.
- 6. Advantages Clean. Renewable and reliable. Nofuel costs. Environment Friendly. The energy is free. Not expensive to operate and maintain. Wave energy contains 1000 times the kinetic energy of wind.
- 7. Disadvantages NOISY. Weak performance inrough weather. Needs a suitable site, where waves are consistently strong. Maintenance and weather effect. Effect on marine Ecosystem. Suitable to certain locations.
- 8. Three basic typesof system Onshore Oscillating water column Oscillating wave surge converter Near shore Over topping device Off shore Point absorber Attenuator (pelamis)
- 9. Attenuator • Attenuator liesparallel to the sea level and rides every wave. • That device capture energy from the relative motion of it’s arms. • It’s basically floating device anchored to the seabed. • It’s also known as pelamis.
- 10. Point Absorber • Apoint absorber is a floating structure which absorbs energy from all motion direction. • It converts the motion of the buoyant top relative to the base to electrical power. • It’s base is a dead weight positioned at the seabed. • Because of it’s small size , the wave direction isn’t important .
- 11. Oscillating Water Column •(OWC) is mainly a shoreline wave energy device onto or near to rocks or cliffs. • It consists of a partly submerged hollow chamber fixed at the shoreline. • The motion of the wave into the chamber is converted to air pressure. • This air is compressed and decompressed by the motion of the wave every cycle.
- 12. Oscillating Wave SurgeConv. • These devices typically have one end fixed to the seabed and the other is free. • Energy is collected from the relative motion of the body compared to the fixed point. • The arm oscillates as a pendulum and the pistons compress sea water in flow line. • The water passes the turbine then flow back to the sea.
- 13. Overtopping Device • Overtoppingdevices capture water as waves break into a storage reservoir. • Water is then returned to the sea passing through low-head turbine generating power. • An over topping device may use (collectors) to concentrate the wave energy. • it’s basically an electric turbine.
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- 16. projects for waveenergy worldwide in 2016 700 665 400 296 203 200 150 100 30 20 13 0 100 200 300 400 500 600 700 800 China South Korea Portugal Spain Sweden Norway Italy Belgium United States New Zealand Denmark Installed Capacity in KW
- 17. Current Projects LIMPET, Scotland Nov.2000, 500 kW capacity First commercial device connected to national grid (OWC) Portugal Sep. 2008, 2.25 MW, $17 million. Spring 2009, 25 more converters, 21 MW total output, 15000 homes powered
- 18. in September2012, Carnegie unveiled the design for a new CETO 5 unit used in the project. The new design incorporates significant improvements over the previous generation CETO units including CETO 3 and 4. The CETO 5 unit has a higher diameter of 11m compared with the 7m diameter of the CETO 3 unit. It has a rated capacity of around 240kW which is three times higher than that of CETO 3. Waiting for CETO 6 that is able to produce 1000 KW Australia
- 19. Egypt Around 3000kilometers of sea coasts may provide Egypt with energy resource -Wave energy- that may be used for electricity The main electricity generation resources in Egypt are thermal power plants operated with petroleum fuel and/or natural gas, and hydro-power plants located at the river Nile 86.8% of this amount have been generated from thermal resources, while the remaining amount have been produced from the hydro-power plants and the wind farm in Zaafarana on the red sea coast
- 20. Challenges • Some devicesalready been destroyed by the forces of tides and strong storms • Accessibility, maintenance and repair can also be costly • The typical efficiency of a wave energy device at the moment being only about 30 % . • There is a potential impact on the marine environment. • Noise pollution, for example, could have negative impact if not monitored, although the noise and visible impact of each design varies greatly • Wave farms can result in the displacement of commercial and recreational fishermen from productive fishing grounds
- 21. References https://www.researchgate.net/publication/224198532_Research_plan_for_harnessing_wave_energy_in_ Egypt http://www.urbanearth.co.za/articles/ocean-energy-generation-potential-south-africa http://www.maspero.eg/wps/portal/home/egynews/news/science-and-technology/details/_0/35f44411- 343b-4df3-8a41-6b3ab6c60885/ https://www.sciencedirect.com/science/article/pii/S1876610214002240 https://marineenergy.biz/2015/05/08/ghana-connects-wave-energy-plant-to-its-grid/ https://www.power-technology.com/features/featurethe-race-is-on-five-countries-making-the-most-of- their-wave-power-potential/ https://www.canstarblue.com.au/energy/alternative/what-is-wave-energy/ https://www.esi-africa.com/south-africa-wave-energy-power-plant-development/ http://www.garnautreview.org.au/update-2011/commissioned-work/potential-wave-energy.pdf
- 22. The END Thanks forListening