Tidal EnergyTidal EnergyBy:By:

Melissa PskowskiMelissa Pskowski

Nicole LiguoriNicole Liguori

Tidal EnergyTidal Energy

Tidal Power is used to produce electricity Tidal Power is used to produce electricity by using the energy from the tides of the by using the energy from the tides of the ocean. ocean.

Tidal Stream systems are very similar to Tidal Stream systems are very similar to windmills. Kinetic energy from the moving windmills. Kinetic energy from the moving water of the tides spins turbines thus water of the tides spins turbines thus generating electricity. This electricity is generating electricity. This electricity is produced by using tidal energy generators.produced by using tidal energy generators.

Tidal Power: East River New York Tidal Power: East River New York

So far 6 turbines have been put in place in So far 6 turbines have been put in place in hopes of creating a renewable energy source hopes of creating a renewable energy source using the rivers intense and fluctuating currents. using the rivers intense and fluctuating currents.

There is a proposed 300 turbines they hope to There is a proposed 300 turbines they hope to install which could generate enough power to install which could generate enough power to generate electricity to 10,000 homes.generate electricity to 10,000 homes.

This project is known as the RITE project named This project is known as the RITE project named for the Roosevelt Island Tidal Energy Project. for the Roosevelt Island Tidal Energy Project.

Tidal BarrageTidal Barrage

Very similar workings like a hydro-electric Very similar workings like a hydro-electric scheme, but the dam is much bigger.scheme, but the dam is much bigger.

A dam is built across a river – then water A dam is built across a river – then water is trapped at high tide – at low tide the is trapped at high tide – at low tide the

water is releasedwater is releasedReleased water turns turbines turning Released water turns turbines turning

generators produces electricitygenerators produces electricity

Advantages of Tidal EnergyAdvantages of Tidal Energy

Inexpensive: not costly to maintain and once its Inexpensive: not costly to maintain and once its been built it is free (underwater turbines).been built it is free (underwater turbines).

Environmentally Friendly: no fuel is needed and Environmentally Friendly: no fuel is needed and there are no greenhouse gases or other waste.there are no greenhouse gases or other waste.

Reliability: produces electricity and the tides are Reliability: produces electricity and the tides are predictablepredictable

Turbines are do not take much to build and there Turbines are do not take much to build and there is no real, harmful environmental impact.is no real, harmful environmental impact.

Disadvantages of Tidal EnergyDisadvantages of Tidal Energy

Effects on plants and animals that live near tidal stationEffects on plants and animals that live near tidal station Very expensive to construct a barrageVery expensive to construct a barrage Limited construction locationsLimited construction locations Power is often generated when there is a little demand Power is often generated when there is a little demand

for electricity.for electricity.

What Causes the Tides?What Causes the Tides? Tides are caused by the relative motions of the Tides are caused by the relative motions of the

Earth, Moon and Sun and the gravitational Earth, Moon and Sun and the gravitational forces that accompany each. forces that accompany each.

Water levels and tidal currents are caused by Water levels and tidal currents are caused by the positions of the Sun and Moon relative to the the positions of the Sun and Moon relative to the Earths rotation. Earths rotation.

Thus, making this resource completely Thus, making this resource completely renewable.renewable.

Tidal energy can be used to its greatest potential Tidal energy can be used to its greatest potential in areas with strong tides, current velocities, and in areas with strong tides, current velocities, and a high water level.a high water level.

Bay of FundyBay of Fundy

Is a bay on the Is a bay on the Atlantic coast of North Atlantic coast of North America. It’s located America. It’s located on the northeast end on the northeast end of the Gulf of Maine of the Gulf of Maine between the between the provinces of new provinces of new Brunswick and Nova Brunswick and Nova Scotia in Canada.Scotia in Canada.

Why is it so unique?Why is it so unique?

It is known for its high tidal range and the bay is It is known for its high tidal range and the bay is recorded as having the highest vertical tidal range in the recorded as having the highest vertical tidal range in the world. Tides can rise to the height of a four story buildingworld. Tides can rise to the height of a four story building

Electrical Power GenerationElectrical Power Generation

There have been several proposals to build tidal There have been several proposals to build tidal harnesses for electrical power generation. Mainly harnesses for electrical power generation. Mainly

involving building barrages which effectively dam off a involving building barrages which effectively dam off a smaller arm of the bay and extract power from water smaller arm of the bay and extract power from water

flowing through them.flowing through them.

Works CitedWorks Cited Tidal Power. Wikipedia. Wikipedia Foundation, Inc. 21 Apr 09. Tidal Power. Wikipedia. Wikipedia Foundation, Inc. 21 Apr 09.

www.wikipedia.org/tidalpower .www.wikipedia.org/tidalpower . Energy Resources-Tidal Power. 17 Apr 09. Energy Resources-Tidal Power. 17 Apr 09.

http://home.clara.net/darvill/altenerg/tidal.htm.http://home.clara.net/darvill/altenerg/tidal.htm. N.Y. Tests Turbines to Produce Power. Washington Post. 17 Apr 2009. N.Y. Tests Turbines to Produce Power. Washington Post. 17 Apr 2009.

http://www.washingtonpost.com/wp-.http://www.washingtonpost.com/wp-.

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