Tidal Energy Tirzi Crupi & Cori Mancuso

The Process A dam or stationary structure is first built across a river/in an ocean. Turbines are connected to these and are located underwater. Tides turn the turbines which power generators to create energy.

In Depth The large dam is built across a section of the river or ocean. As the tide goes in And out The water flows through the tunnels in the dam. The ebb and flow in the tides can then turn the turbines. Turbines then power the generator and create electricity!

Basic Diagram Turbine Generator Electricity!

Advantages Tides are more predictable than wind or solar power. Once the structure is built, there is free energy! Doesn’t produce emissions. Doesn’t need fuel to operate. Don’t have large environmental impact.

Disadvantages Very expensive to build the barrages. Barrages make up a lot of space. Not a lot of suitable sites for construction. It changes the environment upstream and downstream, and takes away animal habitats. Tides only provide energy for about 10 hours a day.

Cause of tides Moon and earth are attracted to each other, like magnets! Moon tries to pull everything away from the earth, while the earth pulls everything back, other than water. Since water is always moving the earth can’t hold it, so the moon can pull it. There are both high and low tides.

Bay Of Fundy From an old folklore, in the Mi’kmaq First Nations, there is a claim that the tides of the Bay are caused by a large whale splashing in the water. ( Simpler explanation). Oceanographers say it is a coincidence of timing. The time it takes for the large wave to go from the mouth of the bay to the inner shore and back is virtually the same time as one high tide to the next. There is rivalry with the Bay of Fundy and the Minas Basin with the Leaf Basin in Ungava Bay as to who claims the highest tide in the world.

The Bay of Fundy

Barrages/Turbines in Use There is only a few large barrages currently working around the world. These include, at 240 Mw bulb turbine at La Rance, Brittany, France and a 20 Mw plant at Annapolis Royal, Nova Scotia, and Canada. By 1984,there were eight power plants in China.

La Ranca Power Station La Ranca Tidal Power Station Before and after construction La Ranca Currently

Works Cited ergyfacts/sources/renewable/o cean.htmlhttp:// ergyfacts/sources/renewable/o cean.html energ/tidal.htm#advhttp://home.clara.net/darvill/alt energ/tidal.htm#adv h/tidal/index.htmlhttp:// h/tidal/index.html _of_Fundy