A series of seemingly clumsy ocean power generation equipment prototypes designed by energy companies around the world staged their first "journey through the water." The progress of these tests marks a new exploration of the old problem of how to get energy from the sea, which has been for decades.
The vast majority of wind turbines are similar in appearance, resulting in a competition using wind power more like a weird race than a Formula One race. Currently, a variety of different forms of marine power plants are in development. With these devices, designers hope to find the most effective way to capture energy in the harsh chemical and physical environments of waves and tides.
"sea snake"
The search for renewable energy from the oceans really began during the oil crisis of the 1970s. The World Energy Council said that the global available ocean energy is estimated to generate 1,000 trillion kilowatts of hours of electricity, but the pace of harnessing ocean energy has been slow.
The so-called "sea snake" refers to the world's first commercial wave power plant, composed of three 150-meter-long articulated steel structures. Its principle of operation is to use a bending movement to drive a hydroelectric generator to generate 750 kilowatts of electricity. Surprisingly, the "Sea Snake" is located on the northern coast of Portugal and the milestone in the field of renewable energy was put into operation in 2008. Although the lapse of time is relatively short, but a series of new competitors have followed "sea snake" appeared to try to compete with them.
The world's first commercial wave power plant - "Sea Snake" is located on the northern coast of Portugal, just put into operation in 2008. The "Sea Snake" generator is a 150-meter-long steel-hinged structure that generates 750 kW of electricity by driving hydroelectric generators through bending movements.
The picture shows a novel design, a scaled-down "python" that uses waves to generate electricity. "Python" rubber material soft and flexible body, filled with sea water. The waves create pressure waves inside the python, and the pressure waves continue to move forward to eventually drive the tail generator.
"Python"
Designed by Britain's Checkmate Marine Energy Company, a wave power generator called "Python" is a large python-like power plant made of rubber instead of steel. "Python" is actually a tube filled with water. When the waves are squeezed through the top of the waves, an "outward swell wave" can be generated internally. When the waves reach the tail end, they can drive the generator to generate electricity .
It is reported that the final design of the "Python" width will reach 7 meters, a length of 200 meters, one-twenty-fifth-size prototype has recently completed the test. "Python" developers said that full-size "Python" put into use to meet the electricity needs of 1000 ordinary families. According to them, "Python" will be put into operation around 2014.
This float is part of an experimental wave power plant located near Fremantle, Western Australia. Each float can be moved down by the waves, which in turn drives seawater through pipes laid on the seabed and eventually into the land, and turbines on land will be powered by seawater.
Pistons angry - in the design, these floats at least 6 meters into the water. The upper part was forced to move down when the waves passed and then returned to its original position. This process will compress the air inside the hollow structure and the compressed air will pass through the carried generator.
Floating Platform - This floating platform in the UK is currently in "unemployed" conditions and is waiting to be deployed to the East Coast later in 2009. The floating platform is connected with the vertical shaft, the vertical shaft will move up and down under the action of the sea waves, and then drive the generator connected with it to generate electricity.
Column dance
Another "sea harvester" is based on a completely different concept - floating. Hugh-Peter Kelly, the British energy company Trident Energy, expressed doubts as to whether the "sea snake" joints and hydraulics could survive long in a corrosive marine environment. He said: "The easiest way to generate electricity from a sea wave is to use a float attached to a column, which drives the linear generator to generate electricity by moving the float."
Even based on such a seemingly simple idea, the ultimate design of power generation equipment has reached the scale of surprising extent. It is reported, TridentEnergy designed a hydrofoil-like float, can produce ascending force and propulsion when the waves pass. Kelly said: "Hydrofoil floats generate more than 50% more energy than conventional floats of similar size."
TridentEnergy designed a "marine buoy" equipped with a linear generator inside - generating electricity by moving the magnet. Kelly said each of their hydrofoil-like floating platforms will generate up to 1 megawatt (MW) of electricity, and the trial installation will take place at its first offshore pilot on the Suffolk Coast in summer 2009.
Tidal Turbines - This platform is called "SeaGen" and has two turbines. In 2008, SeaGen was installed in the trendy Gulf of Strand, Northern Ireland, providing 1.2 megawatts to local households.
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