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Wave power

is an alternative source of renewable electricity with tremendous future potential

 

 

The sea is an abundant, inexhaustible and predictable energy resource. There are a number of ways of converting this energy for use. However, most research and development is concentrating on techniques for harnessing wave movement and to a lesser degree, the use of tide energy. The aim is to attain the technical and economic viability that will make it possible deploy wave energy at a commercial level in the near future.

The countries that are most active in developing and testing wave technology are located along the European Atlantic axis, where the world's as yet largely untapped capacity is concentrated.

 

Worldwide installed wave capacity, MW 2012

 

CountryInstalled capacity (MW)Capacity in approved projects (MW)
 United Kingdom 4,3 Several pilot plants
 Portugal 0,7 
 Spain 0,3 0,14
Denmark0,25 
China0,192,4
Sweden0,1510
New Zealand0,040,22
Belgium 20
South Korea 0,5

 

Source: IEA-Ocean Energy Systemas annual report 2012

 

Commercial exploitation of marine energy from 2020 is forecast to parallel the current development of offshore wind power and earlier trends in onshore wind.

 

mercado wave grafico1

 

It is estimated that by 2050 marine energy could meet 15% of European energy demand, with an estimated installed capacity of 188 GW.

 

wave market

Various alternatives for capturing energy are being developed and tested. As yet, there is no clear victor

 

img columna oscilante circulo EN

The waves drive a column of water which pushes the air in a sealed chamber through a two-way air turbine.

img columna oscilante EN

img columna OWSC circulo

The wave strikes a hinged or flexible structure which transfers the energy.

img columna OWSC EN

img absorbedores puntuales circulo EN

The energy is generated by the movement of a floating body relative to another fixed (anchored or submerged) body.

img absorbedores puntuales

img rebosamiento circulo EN

Operates like a storage vessel, with wave water spilling over the top and being emptied through the bottom via turbines.

img rebosamiento EN

img atenuadores lineales circulo EN

Energy generated by the movement of long, hinged floating devices situated at right-angles to the waves.

img atenuadores lineales EN

img diferencial de presion circulos EN

The submerged devices anchored to the seabed move as a result of the pressure gradient force generated by the wave and tidal movements.

img diferencial de presion EN

 
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