Ocean energy: Difference between revisions
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The [[ocean]]s have a tremendous amount of energy and are close to many if not most concentrated populations. Many researches show that ocean energy has the potentiality of providing for a substantial amount of new [[renewable energy]] around the world.<ref>Carbon Trust, ''Future Marine Energy. Results of the Marine Energy Challenge: Cost competitiveness and growth of wave and tidal stream energy'', January 2006</ref> |
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==Renewable ocean energy== |
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The oceans remain a vast and largely untapped source of renewable dikes in the form of fluid flow (currents, waves, and tides) and thermal and salinity gradients. Several means of extracting [[energy]] from the ocean have been tried. Some are currently in deployment stage. |
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*[[Marine current power]] |
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*[[Ocean thermal energy conversion]] (OTEC) |
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*[[Salinity gradient power]] |
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*[[Tidal power]] |
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*[[Wave power]] |
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Sometimes [[Wind power]] (offshore) is also included in the list of renewable ocean energies. |
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==== Theoretical potential of renewable ocean energy ==== |
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The theoretical global ocean energy resource is estimated<ref> International Energy Agency, Implementing Agreement on Ocean Energy Systems (IEA-OES), Annual Report 2007 </ref> to be on the order of: |
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* 2.000 TWh/year for osmotic energy |
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* 10.000 TWh/year for ocean thermal energy (OTEC) |
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* 800 TWh/year for tidal current energy |
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* 8.000 – 80.000 TWh/year for wave energy |
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This theoretical potential is several times greater than the actual global electricity demand, and equivalent to 4000 – 18000 MToE [[Tonne of oil equivalent|MToE]] (million tons of oil equivalent). |
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==Non-renewable ocean energy== |
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[[Petroleum]] and [[natural gas]] beneath the ocean floor are increasingly important sources of energy. An [[Ocean engineering|ocean engineer]] directs all phases of [[Hydrocarbon exploration|discovering]], [[Extraction of petroleum|extracting]], and delivering offshore petroleum (via [[oil tanker]]s and [[Pipeline transport|pipelines]]), a complex and demanding task. Also centrally important is the development of new methods to protect marine wildlife and coastal regions against the [[Petroleum#Environmental_effects|undesirable side effects]] of offshore oil extraction. |
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==References== |
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{{Reflist}} |
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==See also== |
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* [[Energy harvesting]] |
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* [[International Electrotechnical Commission]] |
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* [[Ocean Engineering]] |
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* [[Renewable energy commercialization]] |
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* [[European Ocean Energy Association]] |
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==External links== |
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Ocean Energy Council: [http://www.oceanenergycouncil.com |
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]{{Ocean energy}} |
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{{Electricity generation|state=autocollapse}} |
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[[Category:Energy from oceans and water]] |
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[[Category:Oceans]] |
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[[Category:Ocean energy| ]] |
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[[de:Meeresenergie]] |
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[[fr:Énergie marine]] |
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[[it:Energia marina]] |
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Revision as of 16:14, 12 December 2008
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