The CETO 6 design builds on the experience gained in all previous CETO generations and incorporates some important improvements.
The diameter of the buoyant actuator has the most significant influence on power output and has been increased to approximately 20m from the 7m diameter 80kW unit successfully tested at the Garden Island site in 2011 (pictured below) and the most recent 11m diameter, 240kW units tested in 2015 at the same site (pictured below).
Apart from being larger, CETO 6 will also incorporate the power generation offshore, inside the buoy rather than onshore as with the current CETO 5 generation being deployed for the Perth Wave Energy Project. Locating the power generation within the buoy removes the need to attach pumps, accumulators and other hydraulic components to the seabed, avoiding the requirement for offshore heavy lift vessel capacity and reducing the offshore installation and maintenance time and cost.The demonstration of CETO incorporating subsea generation and transmission of electrical power will allow Carnegie to take advantage of deeper, more distant to shore wave resources and significantly increases the size of the commercial market for CETO and allow greater responsiveness in the CETO control system.
Initial development of CETO began in 1999 with desk top research and design. Work on the design of the CETO technology platform commenced in 2003 with construction of the first prototype unit starting at the end of the same year. The CETO I prototype proved the concept of generating zero-emission power and freshwater from the ocean waves in 2006.
Between 2006 and 2008 CETO 2 prototypes were developed and tested in the waters of Fremantle in Western Australia at Carnegie’s purpose built Wave Energy Research Facility. These were approximately 1kW prototypes and provided new commercial design concepts.
In the period from 2009 to 2015, Carnegie worked on a significant scale up of the CETO system from the 1kW early prototypes to 80kW and then to 240kW units which were tested in a full scale project environment at Carnegie’s Garden Island site in Western Australia. The Perth Wave Energy Project involved the design, construction and operation of three 240kW CETO 5 units which produced and sold both power and water to the Australian Department of Defence who operate Australia’s largest naval base, HMAS Stirling, on Garden Island and operated for over 14,000 cumulative hours across four seasons.
Work began in 2013 on the next generation CETO 6 design which has a targeted capacity of 1MW. The CETO 6 generation will again be demonstrated first at Carnegie’s Garden Island site in Western Australia ahead of international installations.