CETO Commercial Scale Unit
The CETO 6 design (pictured below, left) 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 (see image on right) and the 11m diameter, 240kW units due to be tested in 2015 at the same site (pictured below, right). This translates to a CETO 6 targeted power capacity of 1MW and is aimed at being demonstrated in a 3MW project starting construction in 2017.
CETO 6 will also incorporate the power generation offshore and subsea rather than solely 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, removing the requirement for offshore heavy lift vessel capacity. This also reduces 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 will significantly increase the size of the commercial market for CETO.
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.
Recent work has focused on the design and manufacture of the commercial scale CETO unit (CETO III) and its testing in the waters off Garden Island in Western Australia.
A significant scale up followed based on the successful CETO design which delivered the design and manufacture of the 80kW CETO CETO 3 system and its testing at Carnegie’s commercial scale site in the waters off Garden Island in Western Australia.
Since 2011, Carnegie has focused on using the results of the 80kW unit tests to commence the design work on a 240kW unit (CETO 5). The decision was taken to test this unit in a full scale project environment by connecting 3 of the CETO 5 units together in an array and grid connecting at the Garden Island site. The aim was to produce both power and water with this system and sell both to the Australian Department of Defence who operate Australia’s largest naval base on Garden Island.
Through 2012 & 2013, work progressed on the design development in parallel with the project development. Carnegie successfully obtained onshore and offshore tenure and environmental approvals, secured all project funding and commenced manufacture and construction. The first CETO 5 unit was installed in November 2014, with subsequent unit installations in January 2015 and March 2015. The Project was officially connected to the electricity grid at HMAS Stirling in February 2015.
Work also began in 2013 on the next generation CETO 6 design which has a targeted capacity of 1MW and will integrate power generation offshore, within the CETO buoy. The CETO 6 generation is aimed at being demonstrated in a 3MW project starting construction in 2017.