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How to recover energy from waves efficiently

Tuesday 02 Jun 15

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Harry B. Bingham
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DTU Mechanical Engineering
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About DNV GL

DNV GL

Damien Ducasse, graduate from DTU Mechanical Engineering, receives DNV GL Award for Young Professionals for his thesis on wave energy devices, “Theoretical and Numerical Analysis of Oscillating Water Column Wave Energy Devices”. He received the award Monday 1st June at a ceremony at Nor-Shipping in Oslo.

The award is given by DNV GL to three engineers as a reward for their scientific research at Nor-Shipping. Ducasse has developed an innovative design to recover energy from waves, and his work is valuable attempt to overcome efficiency and robustness issues of wave energy devices, hopefully contributing to making such devices more competitive on the global energy market. The jury commended this work for completeness, including the validation against model tests.

Optimized use of wave energy
His simulations demonstrated how the wave energy device could be optimized to increase each chamber’s energy absorption – making the device significantly more efficient. Ducasse investigated a particular so-called attenuator-type wave energy converter, which is made of 40 oscillating water column (OWC) chambers which move together in the waves.  

The analysis is based on WAMIT, a code that is widely used in the offshore oil & gas industry. Ducasse modified the code to account for the surface pressures in the different chambers of the device and validated his numerical results against model tests that had previously been performed by two students in a wave basin in Ireland.

 Model  model
Ducasse investigated in particular a so-called attenuator-type wave energy converter, which is made of 40 oscillating water column (OWC) chambers that move together in the waves. Ducasse’s simulations demonstrated how the wave energy device could be optimized to increase each chamber’s energy absorption – making the device significantly more efficient.
 

The DNV GL Award 2015
In 2015, the theme for the award is finding innovative ideas for increasing safety, efficiency and sustainability in shipping. As well as seeking out the best new research, the award aims to support young professionals in the maritime field and demonstrates how varied and interesting the engineering profession can be. More than 30 people from 16 different countries took part in the competition.

Damien Ducasse received the award in the category “Greener” along with 1,000 Euros for his master's thesis “Theoretical and Numerical Analysis of Oscillating Water Column Wave Energy Devices”. Until today, the devices used to harness wave energy face significant operational challenges – they need to become more efficient and robust before they can make tangible contributions to our energy supply. 

DNV GL Award for Young Professionals
Tor E. Svensen, CEO of DNV GL – Maritime, left, with the winners of the 2015 DNV GL Award for Young Professionals:
from left to right, Alexander Iley, Eva Herradón de Grado and Damien Ducasse.

DNV GL Award for Young Professionals 
Andreas Bodmann, Director of Communications, DNV GL - Maritime (left), presented the award to Damien Ducasse (in the middle) at the ceremony at Nor-Shipping in Oslo. Right: Tor E. Svensen, CEO DNV GL – Maritime.