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Recent SEA Clam Developments

The design and performance of the 1992 SEA Clam has been reviewed in the light of technology developments and experience gained in the renewable energy sector. This has led to the further evolvement of the SEA Clam concept particularly in regard to the energy capture and conversion systems. This has led to a larger device with improved productivity and lower cost of electricity generated.

The cost effectiveness of the SEA Clam is due to its high productivity, low capital cost and economies of scale. Productivity is high because of the energy collection takes place over a large area of sea surface allowing multiple opportunities to capture the energy available. Capital cost is low due to an inherently strong and stable floating circular structure that is low volume but large diameter. The modular structure lends itself to low-cost shipyard construction and units can be installed on site by tug in favourable conditions. The rated power output of each device, the highest in the sector, reduces the number of units required for a scheme and therefore minimises the deployment, mooring, grid connection, operating and maintenance costs. It is these features of the SEA Clam that lead to its economic performance and potential for further development.

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