Wave energy could be Australia's carbon-free solution,

AFP, SYDNEY Friday, May 18, 2007, Page 5
New technology harnessing wave energy could be the "holy grail" for providing electricity and drinking water to Australia's major cities, Industry Minister Ian MacFarlane said yesterday.
The technology, developed with the help of more than A$770 million (US$636 million) in seed funding from the government, works through fields of submerged buoys tethered to seabed pumps.
The buoys move in harmony with the motion of the passing waves, pumping pressurized seawater to shore to run turbines and pass through a desalination plant.
"The constancy of the waves even when the surface is dead calm means that you can build a base load renewable energy power station and that is really the holy grail for us, if you can produce renewable energy 24/7," Macfarlane told the Australian Broadcasting Corporation.
Drought-ravaged Australia is the driest inhabited continent on earth and the desalination of seawater is seen as one way of ensuring long-term water supplies for the big cities, which are all on the coast.
With the process requiring large amounts of energy, however, and the country also trying to reduce the greenhouse gas emissions that are responsible for global warming, the technology is seen as providing a double benefit.
The Perth-based Carnegie Corporation, which developed the seabed technology, informed the Australian stock exchange yesterday of its "proposal for a world-first base-load renewable energy power station and zero emission desalination plant."
After successful trials, the CETO system was on track to begin full scale deployment off southern capital cities in 2009, Carnegie managing director Michael Ottaviano said.
Australia was uniquely positioned to take advantage of the technology for both its power and water needs, he said.
All of Australia's southern mainland cities' current water needs could be satisfied by CETO units covering an area of 155 hectares of sea floor at around 75 percent of the price of current desalination projects, the statement said.
In addition, the "Wave Farms" would generate approximately 300 megawatts of zero-emission power, which would be enough to support approximately 300,000 households.
"If the project gets the go ahead this year, then we will be able to start construction in 2009, with full capacity achieved in 2012," Ottaviano said. This story has been viewed 421 times.