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Wave & Tide

Wave and tide energy

Swedish Wave Power Trials

Written by , on December 10, 2008

For his doctoral project at Uppsala University, Rafael Waters, has designed and built a wave power facility on the bottom of the sea, two kilometers off the west coast of Sweden, near Lysekil. Electricity is produced using a linear generator that works with the slow movements of the waves. A conventional generator transforms rotational energy […]  Read more »

“Baseload” Power from Waves

Written by , on November 28, 2008

A British engineer, Alvin Smith, has developed a simple system, called Searaser, which uses ocean wave energy to produce electricity on demand – including so-called baseload power  – even at times when the sea is calm. The system is based on a two-part pump. The bottom part of the pump is anchored to the ocean […]  Read more »

Energy from Ocean Currents

Written by , on November 22, 2008

It has been estimated that their is sufficient energy in the world’s ocean currents to meet 3,000 times the current power needs of the the entire world’s population. The difficulty is in harnessing that energy. Turbines and watermills need water flowing at 5 to 6 knots to operate effectively. But most of the ocean currents […]  Read more »

Energy from the Deep Ocean

Written by , on October 11, 2008

The US Department of Energy has awarded Lockheed Martin a contract to construct a thermal piping system to capture the ocean’s absorbed solar heat. The energy produced could be used to generate electricity or to fuel desalination, and according to the company, the process would be harmless to the ocean’s environment. Lockheed Martin plans to […]  Read more »

World’s First Commercial Wave Energy Farm

Written by , on September 26, 2008

 What is claimed to be the world’s first commercial wave power project opened off the coast of Portugal this week. The €9 million ($16 million) Aguçadoura project is the first of a series experimental wave energy projects by the Ondas de Portugal consortium. The main partners in the consortium are Australia’s Babcock and Brown, with […]  Read more »

More Efficient Tidal Turbine Design

Written by , on September 6, 2008

A team of engineers from Oxford University has come up with a new design for underwater tidal turbines which they believe will be more robust, more efficient and cheaper to build and maintain than anything in operation today. The tidal turbines in operation today are like underwater windmills, with their blades turning at right angles […]  Read more »

Wave Power from Rubber Snake

Written by , on July 8, 2008

Retired physicist Francis Farley and Rod Rainey of Atkins Global have designed a wave power generation system consisting of flexible tube filled with seawater and sealed at both ends like a giant sausage. The structure, called an "Anaconda", streams out in the waves like a windsock pushed by the wind. When each wave passes, it […]  Read more »

Energy Islands

Written by , on May 17, 2008

Researchers at te University of Southhampton are proposing to build a floating “Energy Island” which would harness energy from the wind, sea currents, waves, the sun and the by Ocean Thermal Energy Conversion. OTEC uses the temperature difference between surface and deep-sea water to generate electricity. Although it has an efficiency of just 1-3%, researchers […]  Read more »

Tide Power

Written by , on May 1, 2008

One method of using tidal motion to generate electricity is employed in this power plant on the Rance Estuary in France. How It Works A different method is being tested in New York. Underwater turbines generate electricity from the tidal motion.  Read more »

Wave Power

Written by , on May 1, 2008

Several methods of generating electricity from waves have been developed. One method is being tested at Port Kembla, New South Wales. How It Works A different method is being developed at Freemantle in Western Australia:  The motion of the waves moves a “farm” of underwater balloons. The motion is used to pump water ashore where […]  Read more »