1 Wave Energy ENERGY CONVERSİON
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Wave Energy
ENERGY CONVERSİON
What is Wave Energy?
• Waves are generated by the wind as it blows across the sea surface. Energy is transferred from the wind to the waves.
• Wave energy is sometimes confused with tidal energy, which is quite different.
• Waves travel vast distances across oceans at great speed. The longer and stronger the wind blows over the sea surface, the higher, longer, faster and more powerful the sea is.
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Advantages of wave energy
• Renewable: The best thing about wave energy is that it will never run out. Unlike fossil fuels, which are running out.The waves flow back from the shore, but they always return.
• Environment Friendly: Also unlike fossil fuels, creating power from waves creates no harmful byproducts such as gas, waste and pollution
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Advantages of wave energy
• The energy is free - no fuel needed, no waste produced.
• Not expensive to operate and maintain.
• Can produce a great deal of energy.
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Disadvantages of Wave Energy
• Suitable to Certain Locations:The biggest disadvantage to getting your energy from the waves is location. Only power plants and towns near the ocean will benefit directly from it.
• Effect on marine Ecosystem :As clean as wave energy is, it still creates hazards for some of the animals near it
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• Depends on the waves - sometimes you'll get loads of energy, sometimes almost nothing.
• Needs a suitable site, where waves are consistently strong.
• Must be able to withstand very rough weather.
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Disadvantages of Wave Energy
Comparing to other renewable energy sources
• Northern CA: 30 kilowatt per m wave crest(with storms 1 Megawatt per m)
• Solar energy: 300 watts per m2
• Wind energy: 800 watts per m2
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Renewable Energy Sources
• Ocean energy wave energy is behind wind and solar energy developments
85% fossil based8% nuclear4% hydroLess than 4% is Solar, Wind, Geothermal
8%
44%
48%
(6% geothermal, 2% solar and wind)
Types of devices for wave energy
• Surface Attenuator(pelamis)
• Oscillating Water Column (limpet)
• Point Absorber Buoy
• Overtopping Device
• Oscillating Wave Surge Converter
• Tidal Energy
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Surface Attenuator(also called pelamis)
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Surface Attenuator
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Oscillating Wave Surge Converter
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Oscillating Water Column
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Overtopping Device
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Point Absorber Buoy
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Tidal Energy
Benefits of Ocean Wave Energy
Why better than other renewable energies
• Available 24/7 on 365 days - therefore power produced from them is much steadier and more predictable – waves can be accurately predicted 48 hours in advance and therefore forecast energy output (BUT irregularity in wave ampitude, and direction)
• Good data on waves from wave monitoring bouys
• Wave energy contains 1000 times the kinetic energy of wind (can produce the same amount of power in less space)
THANK YOU
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