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Published on July 5th, 2012 | by James Ayre

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Predicting Wave Power Will Double Energy Generated



 
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The energy generated from wave capture technology can be doubled by implementing new methods developed to predict wave power.

Significant advancements in marine renewable energy are possible because of new research from the University of Exeter. The research could pave the way to making wave energy a more viable source of power.

 

 

The research was done by a group of mathematicians and engineers from the University of Exeter and Tel Aviv University. They created a way to accurately predict the power of incoming waves. This predictive ability will make the technology much more efficient, allowing the extraction of twice as much energy as is currently possible.

The UK has great potential for wave energy. It’s actually been estimated that the electric requirements of the UK could be supplied entirely from wave power. But the current technologies to extract and convert energy from the ocean are still immature when compared to solar and wind technologies. And they are as of yet not commercially competitive with other power sources without subsidy.

There has been very clear progress made by leading developers, but there are many challenges remaining. Most importantly, there are no viable technologies to prevent the devices from being damaged by the hostile marine environment, and for improving the efficiency of energy capture from the waves.

This new research addresses both of these problems “by enabling control over the devices that extract wave energy. The key to this is to enable devices to accurately predict the power of the next wave and respond by extracting the maximum energy.”

“The research focused on point absorbers, commonly-used floating devices with parts that move in response to waves, generating energy which they feed back to the grid. Point absorbers are already known to be much more efficient in the amount of energy they produce if their response closely matches the force of the waves and previous research has looked at trying to increase this efficiency.”

“However, this is the first study that has focused on increasing the device’s efficiency by predicting and controlling internal forces of the device caused by forthcoming waves.”

The researchers created a system which predicts the size of the incoming wave. The resulting data allow a specialized program to create, in real-time, the ideal response for a wave of a specific size. Since “the device responds appropriately to the force of the next wave, it is far less likely to be damaged and would not need to be turned off in stormy conditions, as is currently the case.”

Lead author Dr Guang Li of the University of Exeter said: “Our research has the potential to make huge advances to the progress of marine renewable energy. There are significant benefits to wave energy but progressing this technology has proved challenging. This is a major step forward and could help pave the way for wave energy to play a significant role in providing our power.”

Co-author Dr Markus Mueller of the Environment and Sustainability Institute at the University of Exeter’s Cornwall Campus said: “The next step is for us to see how effective this approach could be at a large scale, by testing it in farms of Wave Energy Converters.”

The research has just published in the journal Renewable Energy.

Source: University of Exeter
Image Credits: Wave via Shutterstock

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About the Author

James Ayre's background is predominantly in geopolitics and history, but he has an obsessive interest in pretty much everything. After an early life spent in the Imperial Free City of Dortmund, James followed the river Ruhr to Cofbuokheim, where he attended the University of Astnide. And where he also briefly considered entering the coal mining business. He currently writes for a living, on a broad variety of subjects, ranging from science, to politics, to military history, to renewable energy. You can follow his work on Google+.



  • uschi

    I think wave power is a fantastic way of creating clean energy! Especially because it creates no heat and never runs out.

  • http://www.renewableenergypumps.com/ Shamil Ayntrazi

    Sorry for the distliguished two universities.  Incoming wave power is known and it is a function of the period and the square of the wave height. No one can do any thing about this fact.point energy abosorbers react to a maximum of 126 degrees of of 360 degree wave cycle.
    1. The trick is for the system to automatically adjust to incomeing wave height.
    2. Also to absorb the Energy of the Lee side of the wave.
    The above are patented and are detailed at http://www.renewableenergypumps.com

    In addition the system is a Coordinated Offshore Energy Extraction system, Wave, Ebb/Tide, Wind, Solar and deep sea cold water extraction for air conditioning.

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