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The operation is based on large “mechanical arms” that were installed in the dock of the Puerto de Pecém. The end of these mechanisms, in contact with the sea water, has a circular buoy.
With the beating of the waves, the structure moves (up and down) activating hydraulic pumps, which make the fresh water contained in a closed circuit, in which there is no exchange with the environment, circulate in a high pressure network. The high pressure water is directed to an accumulator, which has compressed water and air in a hyperbaric chamber, which is the lung of the device.
The project, a pioneer in Latin America, will initially supply the port itself. It is an initiative of the Alberto Luiz Coimbra Institute of Engineering Research and Graduate Studies (Coppe) - linked to the Federal University of Rio de Janeiro, and financed by Tractebel, also with support from the government of the State of Ceará.
Ceará was chosen for the installation of the mechanism mainly due to the constancy of the trade winds, which generate regular waves in the Ceará sea. Although they lack high amplitudes, as in Hawaii for example, they are constant, a factor that increases the efficiency of the plant.
It is currently in its testing phase and should be able to start up definitively next year, when it can produce about 100 kilowatts to be able to supply energy to the main port of Ceará and with that same number of kilowatts, also supply 60 families.
Brazil has great potential to harness the power of the sea and convert it into electrical energy. The Brazilian coastline, about 8 thousand km long, is capable of receiving wave power plants that could produce around 87 GW. Of that total, 20% would be convertible into electrical energy, which would be equivalent to 17% of the total installed capacity in the country. The environmental impacts of this type of energy source are considered low.
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Diário do Nordeste and Portos e navios