Tidal Energy


Introduction / How it works
Tidal energy is generated by the relevant movement of the water which interact by means of gravitational forces. A dam is assembled across a river. When the tide flows in and out, the water goes through tunnels and into the dam. The flow of the tides can be used to operate a turbine, or it can force air through a pipe, which then turns a turbine. Large lock gates, like the kind that are used on canals, would allow a ship to pass through it.

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Advantages
  • Water is a renewable source of energy, so the turbines work as long as the water flows
  • When tidal generating stations a created, the energy itself is very cheap
  • You can predict tides much easier then wind or even sunlight
  • Water is not harmful to the environment
Disadvantages

  • The generating stations are expensive to build
  • It isn't right for many areas because really high tides are needed to work
  • The environmental occurrence on marine life in an area can be important, because of the changes in the water level and the waters quality
  • Marine life is destroyed in the process and sometimes by the turbines themselves
Comparisons
Tidal energy is the cheapest method to use out of every other generating method. From the study made in 2006, it was about 2 cents per hour, hydro energy was about 23 cents per hour, and solar energy cost about 65 cents per hour. Also there will always be tides, they may not always be strong but the will always be here, unlike wind (for wind energy) or sun (for solar energy.) Tidal energy is also renewable so it helps the environment save other sources such as fossils (for Fossil Fuels) or nuclear waste (for nuclear energy.)

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Bibliographyexternal image moz-screenshot-9.png

http://www.pearsonschoolcanada.ca/index.cfm?locator=PSZn95&PMDBSUBCATEGORYID=&PMDBSITEID=2621&PMDBSUBSOLUTIONID=&PMDBSOLUTIONID=25862&PMDBSUBJECTAREAID=&PMDBCATEGORYID=25879&PMDbProgramID=65002

Created by:
Lauren Pink