tidal & wave power andrew chavous & carlo raiteri
Post on 17-Dec-2015
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Tides
Tides are the rise and fall of sea levels
caused by the combined effects of
the gravitational forces exerted by the Moon and the
Sun and the rotation of the Earth.
What is Tidal EnergyTidal power, also called tidal energy, is a form
of hydropower that converts the energy of tides into useful forms of power - mainly electricity. This is the only form of energy whose source is the moon.
History of Tidal Energy
Tide mills are one of the oldest forms of energy
787 A.D. on Spanish, French and British coasts
The incoming water was contained in large storage ponds, and as the tide went out it turned waterwheels producing mechanical power to mill grain
19th century – Process of using Tidal Power to create electricity was introduced in U.S. and Europe
1966 – First large-scale tidal power plant was built in France
Tidal StreamsMake use of the kinetic energy of moving water
to power turbines in a similar way to wind turbines that use wind to power turbines
Pros & Cons of Tidal Energy
Consistent Power
Pollution-Free
Low Operating Costs
Renewable
Efficient
Tides are predictable
Impacts are local not global
Provide a storm surge barrier
Marine Life Affected
High Initial Cost
Device Breakdown
Only provides power for around 10 hrs
Few suitable sites for tidal barrages
Locations are often remote
May restrict access to open water
Can change tidal levels
Decreases salinity in tidal basins
Captures waste near the coast
Reduces kinetic energy of the ocean
PROS CONS
Future of Tidal EnergyPotential for future electricity generation
Tides are more predictable than wind and solar energy.
Many recent technological developments and improvements, both in design and turbine technology, indicate that the total availability of tidal power may be much higher than previously assumed
Economic and environmental costs may be brought down to competitive levels.
Wave Energy
Wave power devices take energy directly from surface waves or from pressure fluctuations below the surface. Wave power is of course powered by waves. As a wave goes by, the buoy rotates and transforms mechanical energy into electrical energy.
History of Wave EnergyFirst patent to use energy converted from waves dates
back to 1799 in Paris.
From 1855 to 1973 there was a drastic increase in exploring potential of wave energy, as 340 patents were filed in England alone.
During the 1970's gasoline crisis, wave power was pushed in order to be a good long term energy solution.
Later, the energy crisis was resolved yet the leaps and bounds made in the innovation of wave power remained.
2008 – First experimental wave farm opened in Portugal
Pros & Cons of Wave Energy
Consistent Power
Pollution Free
Low Operating Cost
Renewable
Minimal Visual Impact
Efficient
Shoreline Protection
Enormous Energy Potential
Offshore Wave Power
Marine Life Effected (not sure)
Device Breakdown
High Initial Cost
Few Implemented
Early Stages of Development
PROS CONS
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