Japan is testing supply opportunities green energy of ocean currents, according to Bloomberg. A giant plane shaped machine to help with this. However, instead of engines, it has two powerful counter-rotating turbines The chassis houses a buoyancy control system.
Kairyu, as the generator was named, weighs 330 tons. In the end, it must be anchored to the sea floor at a depth of 30-50 meters, and use the sea tides to produce green energy and transmit it through cables laid on the sea floor.
This solution has been developed for more than a decade by Japanese heavy machinery manufacturer IHI Corp. The turbines operate in one of the most powerful currents in the world – Kuroshio, which runs along the eastern coast of Japan. According to the Japan New Energy and Industrial Technologies Development Organization (NEDO), Kairyu can generate up to 200 gigawatts, so cover up to 60% of the total. Japan’s current production capacity.
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energy from the oceans
As Bloomberg notes, the main feature ocean currents is their stability. Flowing with slight differences in speed and direction, giving them a performance factor of 50 to 70 percent.
The Japanese conducted the first tests in the waters around the Tokara Islands in southwestern Japan. The prototype proved that the device could generate 100 kW of stable power. The company is now planning to expand to a full 2 MW system.
power from the sea
While the Kuroshio Current flows rapidly from From 1 to 1.5 meters per second, in the case of some tidal systems, we can even talk about a speed of 3 meters per second.
Japan also participates in the Ocean Thermal Energy Conversion (OTEC) technology, which takes advantage of the temperature difference between the surface and the deep ocean. This, however, is more applicable in the tropics.
As experts note, in the case of Japan, energy from the sea is much more useful than wind energy common in Europe. IHI experts predict that the tidal generator will be able to start commercial operation in the next decade.
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