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CETO is a technology developed to harness the power of oceans to generate electricity or produce desalinated water. CETO was first developed in 1975 by Alan Burns in Perth, Australia. It consists of a single piston pump attached to the sea floor, with a float tethered to the piston. Waves cause the float to rise and fall, generating pressurized water, which is piped to an onshore facility which can either generate electricity or purify water using the high pressure sea water. This design is similar to a kelp forest.
Australian ASX-listed clean energy developer Carnegie Corporation is currently developing the CETO Wave Energy technology and has the exclusive rights to own and operate all commercial CETO wave farms in the Southern Hemisphere. The technology is on track to be commercial-ready in 2009.
About the CETO Technology
Named after a Greek ocean goddess, the CETO system distinguishes itself from other wave energy devices by operating out of sight and being anchored to the ocean floor. An array of submerged buoys is tethered to seabed pump units. The buoys move in harmony with the motion of the passing waves, driving the pumps which in turn pressurize seawater that is delivered ashore via a pipeline. The high-pressure seawater is used to drive hydro turbines, generating zero-emission electricity. The high-pressure seawater can also be used to supply a reverse osmosis desalination plant, replacing greenhouse gas emitting pumps usually required for such plants.
Other wave energy & CETO characteristics include:
• Wave energy is a renewable, zero-emission source of power.
• 60% of the world lives within 60km of a coast, minimising transmission issues.
• As water is about 800 times denser than air, the energy density of waves exceeds that of wind many times over, dramatically increasing the amount of energy available for harvesting.
• Waves are predictable days in advance, making it easy to match supply and demand.
• CETO sits underwater, moored to the sea floor, meaning there is no visual impact.
• CETO units operate in deep water, away from breaking waves. The waves regenerate once they pass the CETO units, meaning there is no impact on popular surfing sites.
• CETO units are designed to operate in harmony with the waves rather than attempting to resist them. This means there is no need for massive steel and concrete structures to be built.
• CETO is the only wave energy technology that produces fresh water directly from seawater by magnifying the pressure variations in ocean waves.
• Any combination of power and water can be achieved from 100% power to 100% water.
• CETO contains no oils, lubricants or offshore electrical components. CETO is built from components with a known subsea life of over 30 years.
• CETO units act like artificial reefs in the way they attract marine life.
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References
- Salleh, Anna (2007-10-17). "Wave farm could soon make a splash". ABC. Retrieved 2007-11-29.
External links
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