Wave energy conversion

January 4, 2013

jumbo jobJUMBO JOB: The DP2 heavy lift vessel Jumbo Javelin was used to install 111 transition pieces for the Anholt Offshore Wind Farm off Denmark. The transition pieces, weighing up to 180t each, were loaded in Aalborg and transported to Anholt aboard the Javelin, which was outfitted with a motion compensated walkway, grout plant, new temporary accommodations, in-house developed passive heave compensators with a 2.5m stroke and a safe working load of 300t, and two job-specific, remote operated spreader bars to lift the TPs. The Jumbo Javelin can carry up to nine transition pieces at a time, stowed vertically in the hold. U pon completion next year, the Dong Energy-operated wind farm will have an installed capacity of 400MW.

GL Garrad Hassan has released WaveDyn, which the company claims is the first independently developed wave energy converter design tool to be made commercially available.

The software allows users to model a variety of wave energy conversion device types; combined with a hydrodynamic flow solver and 'a range of additional modules, including Power Take-Off and Mooring modules, allows the user to build models that match the physical properties of real machines', GL Garrad Hassan said.

One of the challenges of wave energy conversion involves the independent evaluation of many different power devices currently in development, the company said. WaveDyn has been under development for nearly five years. The software has undergone beta testing and validation as part of the £8m PerAWaT Project (Performance Assessment of Wave and Tidal Array Systems) commissioned and funded by the Energy Technologies Institute.

propulsionPropulsion provisions: ABB has delivered four Azipod C propulsion systems for Swire Pacific Offshore Operation's Blue Ocean II wind turbine installation vessel built by Samsung Heavy Industries at its shipyard in Korea. The order followed delivery of four Azipod C systems for the Blue Ocean I vessel in September 2011. ABB's system saves space inside the hull and reduces fuel consumption by as much as 25%, the company said. Greater maneuverability will allow the Blue Ocean vessels to operate in a wider weather window. The Azipod C systems were manufactured at ABB's Shanghai factory.


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