Green Ocean Unveils Ocean Treader Prototype

A scale prototype of Green Ocean Energy’s Ocean Treader will be on public display during the All Energy event this month. The company, which is based in Aberdeen, has developed two wave energy machines Wave Treader and Ocean Treader. Using similar technology, the devices harness wave energy and convert the motion into electricity.

Wave Treader attaches to an offshore wind turbine to provide combined wind and wave energy thereby boosting the relatively low efficiency rates of stand-alone offshore wind turbines. Ocean Treader is a stand-alone, fully floating device designed for offshore ocean deployment.

“Interest in our technology has mushroomed since the results of our feasibility test into Wave Treader were announced earlier this year. We are actively in discussions with a number of energy companies and financial backers with a view to installing a full scale prototype early next year. Commercialisation of Wave Treader is anticipated by 2011,” said George Smith, the company’s managing director.
 
The devices developed by the company comprise a sponson at the front, a spar buoy in the centre and a second sponson at the back. As the wave passes along the device first the forward sponson lifts and falls and then the spar buoy lifts and falls slightly less and finally the back sponson does the same.

The relative motion between these is harvested by hydraulic cylinders mounted between the tops of the arms and the spar buoy. The cylinders pressurise hydraulic fluid which in turn spins motors that generate electricity. Each device can generate up to 500KW of electricity which, given their compact size, compares favourably with other devices in the marketplace.

The scale prototype is currently undergoing testing at the New and Renewable Energy Centre (NaREC) in Blyth, Northumberland and also at the wave tank at the University of Strathclyde. The results of the latest round of testing are expected to be announced next month.

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