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Marine Renewables

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March 2015 Issue

Subsea Connectivity For Tidal Turbine Project
Sabella S.A.S. has ordered a complete MacArtney (Esbjerg, Denmark) connectivity solution for its new industrial-scale Sabella D10 tidal stream turbine project.

Over the past decade, Sabella has developed an original concept for a screen of tidal turbines positioned on the seafloor. Pre-orientated in the direction of natural tidal currents and empowered by symmetrical rotor blades, the turbines capture the energy generated by the shift between ebb and flow. The rotor is activated even by modest current motion and powers a generator to export the electricity produced to the land-based grid via a submarine cable anchored and embedded at its landfall.

After successfully installing and testing the Sabella D03 demonstrator turbine unit, Sabella has successfully secured the funds to install and test its full-scale Sabella D10 0.5-kilowatt-rated and 1-megawatt maximal output power turbine in the Fromveur Strait near South Ushant (Brittany, France). Future Sabella tidal farm sites could feature units with a capacity up to 2 megawatts.

For successfully transmitting the harnessed tidal power to the onshore grid, the Sabella D10 relies on a custom MacArtney subsea connectivity solution. Based on a GreenLink Inline Termination for connecting the turbine to the grid via the dynamic subsea export cable, the solution also comprises a couple of hang-off stress terminations, a custom-made flange with various medium- and low-voltage connectors for the turbine nacelle, a junction box jumper cable and various test cables.

Tidal Testing Management In Turners Falls
The Marine Renewable Energy Collaborative (MRECo) has entered into an agreement with the Conte Fish Research Center to manage tidal testing in its large flumes in Turners Falls, Massachusetts.

Tidal energy is capable of providing very reliable and predictable power to the electrical grid. While tidal, like most renewable energy sources, is not continuous, it is more predictable than wind or solar, and its generation devices sit below the water, out of sight.

There are many communities globally that are not grid connected, but 85 percent of the world’s population lives within 50 miles of an ocean. Marine energy promises an almost limitless supply of energy, but the challenge of making the technology capable of withstanding ocean conditions must be met.

In addition to helping new companies commercialize their technologies, MRECo has partnered with the town of Edgartown on Martha’s Vineyard to develop a tidal project in Muskeget Channel, between Martha’s Vineyard and Nantucket, Massachusetts.

Massachusetts Offshore Wind Auction Sells Two Leases
BOEM held the fourth competitive lease sale for renewable energy in U.S. federal waters offshore Massachusetts for potential wind energy development. The auction consisted of two rounds before determining RES America Developments, Inc. (Broomfield, Colorado) and Offshore MW LLC (Princeton, New Jersey) as the provisional winners of Lease Area OCS-A 0500 (187,523 acres) and OCS-A 0501 (166,886 acres), respectively. Winning bids totaled $448,171 in high bids. The total acreage of these two areas nearly doubles the amount of acreage leased for wind energy through competitive sales.

Lease OCS-A 0502 (248,015 acres) and Lease OCS-A 0503 (140,554 acres) did not receive bids.

If fully developed, the area leased could support approximately 2 gigawatts of commercial wind generation, enough electricity to power more than 700,000 homes.

BOEM has previously awarded five competitive wind energy leases off the Atlantic coast: two offshore Massachusetts-Rhode Island, two offshore Maryland and another offshore Virginia.

Including the Massachusetts offshore wind auction, competitive lease sales have generated more than $14.5 million in high bids for more than 700,000 acres in federal waters. BOEM expects to hold another competitive lease sale offshore New Jersey later this year.

The two leased areas are in the Massachusetts Wind Energy Area, which starts about 12 nautical miles offshore Massachusetts. Each lease will have a preliminary term of one year, during which the lessee will submit a site assessment plan to BOEM for approval.

ClassNK, WEIT Form Renewable Energy Alliance
ClassNK (Tokyo, Japan) has strengthened its renewable energy activities by agreeing to form a capital alliance with the Wind Energy Institute of Tokyo Inc. (WEIT). ClassNK will acquire around 30 percent of WEIT’s shares through a third-party allotment, and a nonexecutive director will represent ClassNK on the Institute’s Board of Directors.

Building on WEIT’s analytical expertise and proven track record, ClassNK is strengthening its resources to meet the increasing demand for services, such as the independent third-party Marine Warranty Survey (MWS). This service evaluates potential operational risks in the design, transportation, and installation of renewable energy projects established offshore and aids in securing financing and insurance for new projects. The survey focuses on key factors, such as sea fastening and cable laying, and will be provided through ClassNK’s Renewable Energy Department.

Final Certification for Haliade 150 Wind Turbine
The Alstom (Levallois-Perret, France) Haliade 150 6-megawatt offshore wind turbine installed on the Carnet site in France has secured its final certification from DNV GL (Høvik, Norway). This is a major step and prerequisite for commercial operation, demonstrating the wind turbine’s overall efficiency.

The Haliade will be produced in the Saint-Nazaire plant. It has already been chosen for the Block Island project in the United States and by EDF-EN for three French projects representing a total of 1.5 gigawatts.

Another Haliade wind turbine has been installed off the coast of Belgium at the Belwind site to verify the procedures for wind turbine production, installation, commissioning and operation.

2015:  JAN | MARCH
2014:  JAN | MARCH | MAY | JULY | SEPT | NOV

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