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Vivace

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VIVACE (Vortex Induced Vibration Aquatic Clean Energy)

VIVACE is a very simple approach on harvesting energy from water currents using a very unique concept of Vortex Induced Vibrations (VIV).These are the same vibrations from wind that results in the 1940’s Tacoma Narrows Bridge in Washington mishap. In water, these vibrations regularly damage docks, oil rigs and coastal buildings. For decades, engineers have worked on preventing VIV from causing damages. However, a study from University of Michigan has result in making use of these vibrations as a mean for a hydrokinetic energy system dubbed VIVACE which does not depend on waves, tides, turbines or dams. VIVACE is made up cylinder structures that results in an alternating vortices forming both above and below of the cylinder when current passes through them. These vortices then push and pull the passive cylinder up and down on its springs producing mechanical energy which will be converted into electricity.

Just a few cylinders might be enough to power an anchored ship, or a lighthouse and this technology is scalable up to power production of 1kw – 1GW capable to power 100 000 houses. If we could harness 0.1 percent of the energy in the ocean, we could support the energy needs of 15 billion people. VIVACE energy would cost about 5.5 cents kW/h, Wind energy costs 6.9 cents kW/h Nuclear costs 4.6 kW/h, and solar power costs between 16- 48 cents per kW/h depending on the location[1].

VIVACE is the first known device that could harness energy from most water current like rivers and sea as it works in water flows slower than 2 knots (1.03 m/s).Most of the Earth's currents are slower than 3 knots(1.54 m/s). Turbines and water mills need an average of 5 - 6 knots to operate efficiently( 3.08 m/s)[1].VIVACE is non obtrusive as is can be place beneath water surface avoiding interference with other uses such as

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