MArine REciprocating Superconducting Generator (RSG). MARES aims at developing a next generation of ultrahigh force Superconducting Direct Drive PTOs for wave energy conversion. The maximum power that can be extracted from a planar wave is proportional to the wave period and to the square of the wave amplitude but, to extract this power, the hydrodynamic parameters of the Wave Energy Converter must be modified and this means having the availability of producing high reactive forces. The proposed Reciprocating Superconducting Generator (RSG) is simpler than other existing superconducting generators due to the fact that its alternating movement allows the direct integration into wave energy converters where the primary energy source is also moving in a reciprocating way. This RSG consists of a Circular Switched Reluctance Machine housed inside a flexible moving cryostat with bellows, avoiding the need of any feedthrough for any moving part. The machine is cooled down using a Cryogenic Supply System (CSS) which recirculates helium gas through the coils and the radiation screen and current leads at two different temperatures. The project proposes to build a full system prototype to be tested at the laboratory scale and to analyse its implementation into two existing WEC systems developed by two technologists participating in the project. A set of the prototype generator coils will be made from MgB2 superconducting technology, while the other one will use REBCO tapes. The achieved results for different temperatures will be compared. In both cases the proposed technology will profit from the latest advances in superconductivity and very specifically in recent developments in superconducting magnet technology provided by six of the participants, including the European Organization for Nuclear Research (CERN), a world leader in such activities, in a perfect example of bringing the forefront technologies to social applications.

The SEA-TITAN project aims at making a step change in the wave energy sector by designing, building, testing and validating a crosscutting and innovative Direct Drive Power Take-Off (PTO) solution to be used with multiple types of wave energy converter. The design will be based on the existing Wedge Global W200 PTO prototype and will focus on augmenting its specific force density and efficiency to levels which can significantly increase the energy capture in many types of Wave Energy Converters. These enhancements will also solve one of the key issues with WEC PTO systems, namely achieving sufficiently high peak force to limit hitting end-stops during large waves whilst maintaining high efficiency and low cost for the average wave case. The performance and reliability demanded by wave energy systems exceeds the normal capabilities of commercial, off the shelf components commonly used in other industries. In the few cases where they are suitable, the costs often prove prohibitive. In addition, the lack of predominant PTO technology is causing a barrier to establishing a dedicated supply chain. Currently each original equipment manufacturer system has different requirements, and pursuing the development of bespoke components not only limits the utility of the end product but also multiplies the development costs. The objective of SEA TITAN proposal is to break this practice and to develop an optimized crosscutting power take-off based on the existing switched reluctance linear generator from Wedge Global with application to multiple systems through collaboration with multiple wave energy developers and an industrial partner with a strong track record on technology. In addition this proposal aims to offer the developed technology open source to promote update and accelerate innovation.