A great deal of electricity is already provided by the movement of water in hydroelectric power plants. Usually, large turbines are placed just after dams or under waterfalls that spin as the water rushes past at high speed. There are other ways to generate power from the movement of water, though, and automotive supplier Continental is providing its expertise towards that goal. The supplier's ContiTech subsidiary is drawing on Continental's vast experience with rubber for the project, which places large buoys in the water. Inside the massive tube is a hose pump that moves up and down along with the waves. At the end of the pump lies a turbine that is powered by the compressed seawater. Cables keep the buoys in their desired location and transmit the electrical power back to the shore.

Small-scale testing of the system has proven that the buoys are capable of providing a substantial amount of power while also being able to survive the violent storms of the oceans. ContiTech believes that its wave power could provide up to a third of all the energy needs of the world. Good thing, since we're all going to need plenty of electricity to power our future electric cars, right?

[Source: Continental]


Continental's "AquaBuOY" converts waves into energy

Hanover, November 2008 – Almost three-quarters of the earth's surface consist of water which is almost always on the move. Whether motion is generated by currents, tides, or storms: there is an endless amount of energy available within the world's oceans. So waves could be the energy resource of the future. What's more, marine energy is produced without any CO2 emissions, so it is environmentally friendly as well.

As a specialist in rubber and plastics technology, ContiTech, a subsidiary of Continental AG, has now developed "AquaBuOY", a wave energy converter, together with its Canadian partner Finavera Renewables. "We have concentrated on a technology that works with a hose pump and a buoy that moves up and down", says Dr. Ali Reza Kambiez Zandiyeh, who is responsible for the project at ContiTech Fluid Technology in Grimsby, UK. The hose pump of the "AquaBuOY" moves up and down in sync with the waves. In doing so, the pump compresses the seawater, driving a turbine to produce electric current. The current is then transmitted to shore via seabed cables.

The biggest challenge: a wave power station needs to withstand the heaviest storms on the one hand and still produce energy when waves are low on the other hand. The first "AquaBuOY" tests off the coast of Newport, Oregon, were successful. The hose pump system fulfilled the extreme requirements, generated hydraulic power, and delivered continuous high performance.

"Our development is a major step in the direction of economical generation of electricity from marine energy," says Jason Bak, CEO of Finavera Renewables. Jochen Bard, a graduate physicist and expert in the field of marine energy at the Institute for Solar Energy Technology (ISET) in Kassel, also believes in the new means of energy recovery from the ocean: "Approximately one third of the globe's electricity requirements could be generated from marine energy. Wave power has such a huge potential that we simply must tap that energy resource in the future. All countries situated on the west coast of Europe are excellent wave farm sites. The UK alone could draw 10% to 20% of its energy needs from the ocean."

Floating wave farms supply electric power from the ocean. "Depending on the local situation, our wave power station will consist of between 30 and 50 buoys," estimates Zandiyeh. Bard, too, is confident: "Investment in this renewable energy is a high priority worldwide. Those who are already geared up for this technology will quickly secure leadership for themselves."

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