FOUNDATION
Waveenergyfyn working intensely with the next step towards a full scale plant in the north sea. Based on years of experience in development work in the marine as well as the renewable energy sector is behind the development strategy for the development of WEC'en Crestwing.
The development strategy for the development of WEC'en Crestwing is based on the development of WECér at sea is a long, risky and capita lintensive process.
Before laying of WEC'en Crestwing at sea in larger scale has Waveenergyfyn wanted the following criteria should be met:
· Developing Crestwings PTO system shall generally be done on shore where it can be
tested in full scale up to any selected overload.
· Developing anchoringsystem for Crestwings in wave tank before laying WECén on-sea in a largerscale.
· Strengthened in the hull, anchors and power system shall be tested in the widest possible scale in wave tank.
· WECéns movements in 6degrees of freedom for different wave conditions should be shown forthe largest possible scale in the wave tank.
With thetest runin 2010of "Crestwingfinaltest"is Crestwingtested anddevelopedonshoreafter the abovefour principles,inascale thatissufficientas a basis forplanningand realization offull-scale plantsat selectedsites.
Hydraulic test of Cresting at Aalborg University
"Crestwing concept and annual output The CrestWing is tested on the AAU University through two processes between 13 March 2008 to March 1, 2009 which carried out 325 documented test in irregular 2D waves.
Estimated absorbed efficiency after the first test session (August2008) was in the top of 30 % with indication that there could be a much higher efficiency through the optimization of scale and plant design. After the second test session (December2008),based on the detailed development of the WEC and especially on the optimization of scale(PowerMatrix), has lifted absorbed efficiency by 50% so Crestwing's efficiency is considered to be in the area of 40 to 50%.
Estimated energy production after the test session(December2008), based on the detailed development of theWEC and especiallyon the optimization of scale(powermatrix),has demonstrated the potential annual energy intake from a full scale plant in the North sea to approx.1000MWh.
In summary,the conclusion is positive with a test result showing that Crestwing concept is among the most effective floating WEC installations WorldWide."
Waveenergyfyn´s report Crest Wing - 2nd test fase and AAU report The Crest Wing Wave Energy Device – 2nd phase testing is available from energinet.dk.
Crestwing Wave Energy Converter 3D Wave Tank Model Tests at DHI Hørsholm Denmark
Crestwing has been tested in 2010/11 in DHI's deep water tank at a scale sufficient as basis for planning and realization of a full scale plant at selected site.
The purpose of the experiments at AAU was to determine Crestwing concept's power consumption in various physical configurations and setups, and from this determine the plant.
Most of the experiments on the AAU was performed in 2D irregular waves against DHI where experiments are performed in 3D irregular waves.
The final test study duration of DHI wanted Crestwing tested and developed on-shore,in a scale that is sufficient as a basis for planning and realization of the full scale plant at selected site.
For future planning ResponseAmplitudeOperators (RAOs) for movements, PTO Rod forces, Mooring forces, hull and hinge forces were determined for all test.
With the trial Crestwing final test is Crestwing tested and developed on-shore, in a scale that is sufficient as a basis for planning and realization of the full scale plant at selected site.
In summary, the conclusion is positive with a test result showing that Crestwing concept after the fina ltest on DHI is among the most effective floating WEC installations World Wide.
Waveenergyfyn´s slutrapport Crestwing final test projekt 10465-Final-Rev. 1 31marts11 and Crestwing WEC Model Tests-Final-Rev. 2 14Jan11 is available from energinet.dk. |
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Innovatory worth and risks
The innovatory worth of the Crestwing can, by well planned work progress, be compared with the introduction of the modern aerodynamic windmill-wing. Utilization of the wave energy through the overlying atmospheric pressure and the hydrodynamic shape of the pontoons and efficient wavecontrole will here be the decisive factors.
The Crestwing`s exploitation of the overlying atmospheric pressure and it’s ability to hold and steady the passing waves can become a crucial innovation within the field of wave energy.
The risk or chance are depended on, how well planned the concept in question is.
Co-operation
Waveenergyfyn is interested in co-operation with seriously Institutions, Compagnies and Investors
There is a patent pending for this WEC. |
