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Abstract
Wave energy conversion is a promising alternative to produce clean energy from the huge available resource at sea, but it is also a challenging mission because extraction conditions are difficult due to the harsh environment and also to the low frequency of the energy conversion process. In this regard, powerful Power Take-Offs are required, able to produce high forces at low frequencies, which also must be highly controllable to optimize the conversion process. This paper presents a new type of Linear Electric Generator based on a novel Switched Reluctance Machine, which is being developed in the framework of a H2020 Project called Sea Titan. The paper describes the calculation and the design processes of a 70 kN prototype which will also be manufactured and tested in the framework of Sea Titan, which also includes a feasibility study for a superconducting solution.
Highlights
E UROPES 2050 Energy Strategy has established a target to reduce greenhouse gas emissions by 80%–95% compared to 1990 levels and renewable energy accounting for at least 64% and up to 97% of the electricity consumed [1]. In line with these targets, the Ocean Energy Forum (OEF) produced the Ocean Energy Strategic Roadmap (November 2016) that has estimated that 100 GW of ocean energy capacity could be deployed in Europe by 2050, producing around 350TWh of electricity meeting up to 10 % of Europe’s demand by 2050
Different types of Linear Generators have been proposed for this application, [12]–[18] some of which are based on Self-Excited Machines using Permanent Magnets with different configurations while others are based on non Self-Excited solutions like the one chosen for the Sea Titan Project whose main goal is to develop a new configuration of Linear Switched Reluctance Machine (LSRM) aimed at achieving higher specific forces and efficiencies
As part of the Sea Titan Project, the consortium is developing a conceptual study of a Superconducting Switched Reluctance Machine, based on MgB2 wire
Summary
E UROPES 2050 Energy Strategy has established a target to reduce greenhouse gas emissions by 80%–95% compared to 1990 levels and renewable energy accounting for at least 64% and up to 97% of the electricity consumed [1] In line with these targets, the Ocean Energy Forum (OEF) produced the Ocean Energy Strategic Roadmap (November 2016) that has estimated that 100 GW of ocean energy capacity could be deployed in Europe by 2050, producing around 350TWh of electricity meeting up to 10 % of Europe’s demand by 2050. The project has been named Sea Titan, it has 11 participants, including 4 wave energy technology developers as potential users of this device It is aimed at improving some relevant figures of merit of the PTO such as its Force Density, the Float to Wire Efficiency, the Capex Cost per kW or the LCoE
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