CETO

Ceto ( ; ) is a primordial sea goddess in Greek mythology, the daughter of Pontus and his mother, Gaia. As a mythological figure, she is considered to be one of the most ancient deities, and bore a host of monstrous children fathered by Phorcys, another child of Gaia and Pontus. The small Solar System body 65489 Ceto was named after her, and its satellite after Phorcys. This goddess should not be confused with the minor Oceanid also named Ceto, or with various mythological beings referred to as ketos (plural kētē or ketea); this is a general term for "sea monster" in Ancient Greek.

CETO is a wave-energy technology currently being developed by Australian company Carnegie Clean Energy and its international subsidiaries. CETO is a fully submerged device that converts kinetic energy from ocean swell into electrical power, and in some cases directly desalinates freshwater through reverse osmosis. The name is inspired by the Greek ocean goddess, Ceto. The technology was developed and tested onshore and offshore in Fremantle, Western Australia. In early 2015 a CETO 5 production installation was commissioned and connected to the grid. all the electricity generated is being purchased to contribute towards the power requirements of HMAS Stirling naval base at Garden Island, Western Australia. Some of the energy will also be used directly to desalinate water. Further development of the CETO technology within the EuropeWave project commenced in December 2021, and is still ongoing. CETO is designed to be a simple and robust wave technology. CETO is claimed to be the only ocean-tested wave-energy technology globally that can be both fully submerged and generating power/desalinated water at the same time. The CETO technology has been independently verified by Energies Nouvelles (EDF EN) and the French naval contractor DCNS. ==Technology== The CETO technology consists of a fully submerged buoy anchored to the seabed. Ocean swell causes the buoy to move, and this motion relative to the seabed is harnessed directly to produce electricity in CETO 6, or using pumps to provide pressurised water in the case of CETO 5 and earlier versions. ===CETO 5=== Submerged buoys are moved by the ocean swell and driving pumps that pressurise seawater delivered ashore by a subsea pipeline. Once onshore, the high-pressure seawater is used to drive hydro-electric turbines, generating electricity. The high-pressure seawater can also be used to supply a reverse osmosis desalination plant, producing freshwater. Some historic conventional seawater desalination plants are large emitters of greenhouse gases; this is due to the amount of energy required to drive the grid-connected pumps that deliver the high-pressure seawater to reverse osmosis membranes for the removal of the salt. ===CETO 6=== , CETO 6 is in development, and differs from CETO 5 in having a larger buoy, with the electrical generation onboard and the power being transferred to shore by an electrical cable. The buoy is designed for deeper water and further offshore than CETO 5. ==Projects== ==Relationships== Western Australian Government – $12.5M grant for the Perth Wave Energy Project at Garden Island. Australian Department of Defence & Defence Support Group – MoU for Collaboration on a CETO power and water project and offtake. EDF EN – Northern Hemisphere CETO Power licensee and JV development partner. French Government – $5M grant for Carnegie/EDF EN Stage 1 Réunion Island power project. DCNS – Northern Hemisphere EPCM partner. Sustainable Energy Authority of Ireland – Collaboration agreement & concept funding for a 5 MW Irish CETO power project. British Columbia Government – Grant of $2M for a Canadian CETO project. Australian National Centre of Excellence in Desalination – Desalination research project with funding granted. ==Other wave energy and CETO characteristics== Wave energy is a renewable, high-availability source of power. About 60% of the human population lives within 60 kilometres of a coastline, minimising transmission issues. Since water is about 800 times denser than air, the energy density of waves exceeds that of wind and solar, increasing the amount of energy available for harvesting. Waves are predictable in advance, making it easier to predict mismatches between supply and demand. CETO does not stand for Cylindrical Energy Transfer Oscillating unit – a popular misconception. The name refers to Ceto, a Greek sea goddess. CETO sits underwater, moored to the sea floor, with minimal visual impact above the water. In practice, buoys have been fitted with warning lights on a mast above water. CETO units operate in deep water, away from breaking waves, meaning there is minimal impact on popular surfing sites. CETO units are designed to operate in harmony with the waves. This means, that apart from anchor points, there is no need for massive steel and concrete support structures to be built. CETO units act like artificial reefs because of the way they attract marine life. ==See also== Water desalination Wave farm Baseload World energy resources and consumption ==References== ==External links== Carnegie Wave Energy Limited World of Energy RISE Carbon Trust

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