ASX Announcement
16 October 2007
CETO Project Update – Successful Sea Trials
Outstanding results from initial in-sea CETO II trials
Onshore CETO test rig complete
1st complete CETO II pump on track for sea deployment within weeks
Carnegie Corporation (ASX:CNM) is pleased to announce that results of initial in-sea trials
of its CETO II wave energy technology show near perfect correlation with results predicted
by CETO computational models, confirming its design and clearing the way for
deployment of the first commercial CETO II units within weeks.
The initial deployment will be closely followed by the deployment of subsequent units, and
it is expected that a small array of CETO II units will be operating off Fremantle by the end
of 2008 in addition to deeper water CETO III tests. These final aspects of development
will allow CETO to be commercial-ready in 2009 as previously advised.
Construction of an onshore test rig has also been completed which allows testing of all
pump units prior to ocean deployment as well as ongoing accelerated life cycle testing to
confirm the reliability of the units in parallel with in-sea trials.
Carnegie Managing Director, Dr Michael Ottaviano, said: “These results are a major
milestone on the pathway to CETO commercialisation as they confirm the potential of the
commercial CETO II design and validate all work done to date in the virtual environment.
“Once we finalise the location of our first commercial-scale demonstration project, we will
be able to accurately tailor the CETO system to the specifics of that location using the
validated virtual CETO models, reducing both time and risk,” he said.
About In-Sea CETO II Trials
Testing was designed to compare data measured in-sea with data predicted by the
CETO’s Computational Fluid Dynamic (CFD) modelling system. This system allows an
infinite number of design parameters to be virtually tested at full-scale in a variety of ocean
conditions, and is the final step before physical CETO II prototypes are deployed in the
ocean.
CETO pump components were deployed with instrumentation attached in order to
measure the real forces attracted by the Buoyant Actuators in varying wave conditions,
with the measured data relayed back to onshore computers.
The real measured data has now been compared to the data predicted by the CETO CFD
models and shows excellent correlation. An example of the actual measured results as
compared with those predicted by the virtual models is shown below. The bold green and
black data sets are actual measured data and the thin grey lines, the predicted data.
Background to CETO Development
Following the successful proof of concept milestones of CETO I at Fremantle, Western
Australia in 2005 and the production of power and water in 2006, much of the commercial
CETO II design development has been carried out utilizing complex Computational Fluid
Dynamic (CFD) modelling.
These models involved the development of a purpose-built virtual ocean that requires
sophisticated hardware and software. It allows an infinite number of design parameters to
be comprehensively tested at full-scale in a virtual environment and in a variety of ocean
conditions. Such virtual tests preceded the deployment of real physical CETO II
prototypes in the ocean for in-sea trials.
For example, design variables such as the size, shape and buoyancy of the buoyant
actuator along with material selection, pump dimensions and the like have been tested in
differing wave height, sea and current combinations in this virtual ocean.
An image from the virtual wave tank is included below and video footage is available at
www.ceto.com.au
About the CETO Technology
Named after the 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 can then be used to supply a reverse osmosis
desalination plant, replacing greenhouse gas emitting pumps usually required for such plants. The
high-pressure seawater can also be used to drive hydro turbines, generating zero-emission
electricity.
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, minimizing 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.
Websites: www.carnegiecorp.com.au
www.ceto.com.au
For more information:
Dr Michael Ottaviano
Managing Director
Carnegie Corporation Ltd
(08) 9486 4466
[email protected]
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