The surge phenomenon is a universal event that occurs when waves approach the shoreline. Waves in deep water are essentially water moving in a circular motion. As waves approach the shore, they start “shoaling” as some of the water moving in a circular motion meets the seabed. This interaction with the seabed elongates the circular motion into a horizontal elliptic shape. This in turn amplifies the horizontal movement of the water particles in the near-shore area, creating a strong surge zone, which is the optimal location for the WaveRoller.
The WaveRoller is a device that converts ocean wave energy to electricity. The machine operates in near-shore areas (approximately 0.3-2 km from the shore) at depths of between 8 and 20 metres. Depending on tidal conditions it is mostly or fully submerged and fixed to the seabed. A single WaveRoller unit (one panel and PTO combination) is rated at between 350 kW and 1,000 kW, with a capacity factor of 25-50% depending on wave conditions at the project site. The technology can be deployed as single units or in farms.
The new SURGE 2 Project in Peniche, Portugal, follows the successful SURGE project, where AW-Energy demonstrated the technology with a grid connected device producing electricity to the Portuguese grid from a site fully exposed to the ocean storms.
SURGE2 is also designated the FOAK (First of a Kind) project and has been designed to meet ESB’s WestWave requirements. Manufacturing of the main components for this new industry (begun in 2016) have been sourced globally – Canada, Finland, Italy, Portugal, Spain, Turkey and UK; the main subsystems are the foundation, power take off, panel and panel bearings. The project was financed by AW-Energy and a loan from Finland’s TEKES (now Business Finland). Completion of the site is underway before the deployment will take place.
Lloyd’s Register surveyors have inspected the WaveRoller manufacturing to ensure that the manufacturing processes were in accordance with the specified codes and standards; that the components were in accordance with the accepted drawings and that the manufacturing process and final product is to an acceptable quality and fit for purpose. The main codes and standards specified are demanding but successfully used for years in the offshore oil and gas industry, where integrity and reliability is of the utmost importance.
This manufacturing certificate issued in the ocean energy sector follows the technology certification and design certification. These rigorous certification milestones demonstrate AW-Energy’s commitment to best practices to ensure the safety and reliability of the technology and thus ensuring dependable project returns.