tidal energy

By:Paula Alemán CabreraAdriana Gómez García

Ana Gabriela Melián Núñez

TIDAL ENERGY

1. WHERE DOES THIS ENERGY COME FROM?• This energy comes from the tides. Tides are

caused by the gravitational pull of the moon and sun, and the rotation of the earth.

2. IS IT RENEWABLE OR NON-RENEWABLE?

• It’s a renewable energy because the tides never stop moving.

3. WHAT KIND OF ENERGY TRANSFORMATION TAKES PLACE?

• The movement of the water (tides) is transformed into electric energy.

4. HOW DO WE TRANSFORM THE ENERGY?• To transform the movement of the water into

electricity:• We build a dam in a bay or estuary completely

closed.• When there is a high tide the water enters in

the bay or estuary.• Move a turbine connec- ted to an alternator that generates electric energy.

5. ENVIRONMENTAL IMPACT

• The ecosystem where is the barrier can change the animals and plants that they are very sensitive to the changes of the environment.

• The landscape is damaged because the barrier and machines look bad and the landscape isn’t beautiful.

6. IS IT GOOD ENERGY SOURCES FOR THE CANARY ISLANDS? WHY?

• Yes, because the tides in the Canary Islands are very amplitude and would generate a lot of electric energy.

• But, if we build a barrier in a beach, tourits wouldn’t go to the Canary Islands, because they like the beautiful beachs and weather.

7. PROS AND CONS

PROS:• It’s auto-renewable• It doesn’t pollute• It’s noiseless• The raw material is free (the waves)• It can be in any place and in any time of the yearCONS:• It damage the coastal landscape• It depend of the amplitude of the tides• It’s expensive to move the energy• It’s bad for the plants and the animals