In Company Developments

In 2006, Oceantec patented a new, worldwide, marine energy converter technology. This research and development process provided Oceantec and its highly qualify team of engineers with the opportunity to begin development of a new revolutionary wave energy converter. Due to the high level of commitment employed over the following years, the company had some considerable achievements and we were able to validate the initial numerical models with the entire range of laboratory test results as well as wave tank and sea trials with scaled prototypes.

General Description of the Oceantec patented technology

 
 

Floating body oscillates due to wave excitation in its main DOF: pitch.
Mooring system allows the body to weathervane so that it is faced to the predominant wave propagation direction.
Main advantage: capture system completely encapsulated & free of contact with sea water.
A flywheel continuously spins under the action of an electric motor (Z).
The pitching motion of the WEC caused by wave action is transformed into an alternating precession in the longitudinal hull axis (X).
A coupling device transforms this precession into an unidirectional rotation of higher frequency that is used to feed a conventional electric generator.

Laboratory: PTO workbench

 

• Design Model of the Power Take-off, 1:15 a Model used for 2nd round of Wave Tank Tests.
• Goal: Validation of Advanced Control Strategies.
• Oscillating plate can reproduce Hull interaction with Ocean Waves (both Regular and Irregular Waves).
• Compact Field Point + Labview for Data Acquisition, Monitoring & Control.

Laboratory: wave tank tests

 
1st round of Wave Tank Tests

• Validation model, 1:37,5.
• Goal : Characterise hydrodynamic behaviour.
• Azimuth fans to simulate wind & current forces.
• Regular Waves & Survival tests.

2nd round of Wave Tank Tests

• Design model with Power Take-off, 1:15.
• Goal: Assess power performance & refine hydrodynamic data.
• Regular & Irregular Waves.
• Additional Drift and decaying tests.

Sea trials

Preparation of Sea Trials:

• Authorisation granted – Cala Murgita.
• Installation of marking buoys.
• Installation of deadweights, mooring lines and wave & tide recorder.
• Commissioning of 1:4 prototype.

Test programs

 
1st round of Sea Trials

• Process model, 1:4.
• Goals: Structural and Mooring System reliability;
Improvement of installation and monitoring procedures.
• Deployment: 2 months.
• Fully sensorised: Environmental conditions, Motions & Loads.
• Data analysis: good correlation with simulations, robustness, valuable input to improve WEC design.

2nd round of Sea Trials

• Goal: Further structural tests & WEC Performance.