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What is Ocean Energy? ❖ Term used to describe all forms of energy derived from the sea ❖ Includes wave energy, tidal energy, ocean thermal energy, etc.
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Ocean EnergyEGEE 101HJeffrey Singer & Matthew Quillen
Introduction
❖What is Ocean Energy?❖The Moon and Tides
❖History of Ocean Energy
What is Ocean Energy?❖ Term used to describe all forms of energy derived from the sea❖ Includes wave energy, tidal energy, ocean thermal energy, etc.
Energy Potential❖ Oceans cover more than 70% of Earth's surface
❖ Ocean is world’s largest solar collector
❖ Potential to power the entire world
Energy Potential Cont. ❖ 80% of the sun’s energy is stored within the
world’s ocean surface waters every day
❖ 4,000 times the amount of energy the world uses on a daily basis
The Moon and Tides❖ Earth and Moon are like magnets❖ Earth cannot “hold down” water thus moon is able to pool at it❖ 2 High tides 2 Low tides
History❖ 11th century dams first built
❖ Initial patent for Wave Power device issued over 100 years ago
❖ Formally discovered in 1966, La Rance, France
Initial Ocean Energy Projects❖ World’s first multi-unit commercial wave farm is known
as Pelamis❖ Wave movement sets off hydraulic pump process,
driving generators to produce electricity
Initial Ocean Energy Projects Cont.❖ Ocean Thermal Energy Conversion (OTEC) utilizes natural temperature
differences between warm surface waters and deep cold water
❖ Using its own supply of sustainable 24/7 energy, OTEC can produce tremendous volumes of fresh drinking water
❖ Irregular and Low-Frequency energy source
❖Many different system types❖Deep Ocean vs. Coastal sites❖ Permitting issues
Wave Energy
Wave Energy Conversion❖ Channel Systems- Funnel waves into reservoirs
❖ Float Systems- Drive hydraulic pumps
❖ Oscillating Water Column System- Use waves to compress air within a container
❖Reservoirs and Dams❖Moon❖ La Rance Tidal Power
Plant
Tidal Energy
Tidal Energy Conversion❖ Barrage or Dam
❖ Forces water through turbines
❖ Activates generator to create electricity
❖ Temperature Difference
Ocean Thermal Energy Conversion (OTEC)
Advantages❖Green- Does not emit any harmful
greenhouse gases
❖Renewable
❖Reliable- Seasonal changes yet always in motion
Advantages Cont.❖ Energy Potential- 30-40 KW for every meter of wave
along shore
❖ Area Efficient- Wave farm that is occupying less than a half square mile can generate enough power to supply 20,000 homes
❖ Offshore Wave Plants- Larger energy potential
Disadvantages ❖ Environmental Effects- Causes conflict with
tourism and local acceptance, and unsure of effect on marine life
❖Costs- New stage of technology, wave resources, connection to power grid, lifespan of technology
Concerns of Technology❖ High construction cost with long payback period❖ Protecting shore fronts❖ Preventing alterations in ocean temperatures❖ Keeping sea life migration patterns intact
Future of Ocean Energy❖Move towards leveling costs❖ Electricity prices drive installation ❖ All depends on wave energy density
References ❖ The Moon And Tides. (n.d.). Retrieved April 14, 2015, from http://home.hiwaay.net/~krcool
/Astro/moon/moontides/ ❖ Ocean Energy. (n.d.). Retrieved April 14, 2015, from http://www.energy.ca.gov/oceanenergy
/#tidal❖ Ocean Energy Web Page. (n.d.). Retrieved April 16, 2015, from http://oceanenergy.epri.com/❖ The History and Fun Facts of Ocean Energy. (n.d.). Retrieved April 14, 2015, from
http://mgoceanenergy.weebly.com/the-history-and-fun-facts-of-ocean-energy.html ❖ (n.d.). Retrieved April 14, 2015, from http://www.greentechmedia.com/research/report
/forecasting-the-future-of-ocean-power