Bokhove, O, Kalogirou, A, Henry, D et al. (1 more author) (2020) A novel wave-energy device with enhanced wave amplification and induction actuator. International Marine Energy Journal, 3 (1). pp. 37-44. ISSN 2631-5548
Abstract
A novel wave-energy device is presented. Both a preliminary proof-of-principle of a working, scaled laboratory version of the energy device is shown as well as the derivation and analysis of a comprehensive mathematical and numerical model of the new device. The wave-energy device includes a convergence in which the waves are amplified, a constrained wave buoy with a (curved) mast and direct energy conversion of the buoy motion into electrical power via an electro-magnetic generator. The device is designed for use in breakwaters and it is possible to be taken out of action during severe weather. The new design is a deconstruction of elements of existing wave-energy devices, such as the TapChan, IP wave-buoy and the Berkeley Wedge, put together in a different manner to enhance energy conversion and, hence, efficiency. The idea of wave-focusing in a contraction emerged from our work on creating and simulating rogue waves in crossing seas, including a "bore-soliton-splash". Such crossing seas have been recreated and modelled in the laboratory and in simulations by using a geometric channel convergence. The mathematical and numerical modelling is also novel. One monolithic variational principle governs the dynamics including the combined (potential-flow) hydrodynamics, the buoy motion and the power generation, to which the dissipative elements such as the electrical resistance of the circuits, coils and loads have been added a posteriori. The numerical model is a direct and consistent discretisation of this comprehensive variational principle. Preliminary numerical calculations are shown for the case of linearised dynamics; optimisation of efficiency is a target of future work.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | Copyright (c) 2020 Onno Bokhove, Anna Kalogirou, David Henry, Gareth P. Thomas. This work is licensed under a Creative Commons Attribution 4.0 International License. |
Keywords: | water-wave focussing, wave-energy buoy, electro-magnetic generator, monolithic variational principle, finite-element modelling |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mathematics (Leeds) > Applied Mathematics (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 08 Apr 2020 11:08 |
Last Modified: | 22 May 2020 12:51 |
Status: | Published |
Publisher: | Sustainable Energy Research Group |
Identification Number: | 10.36688/imej.3.37-44 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:159353 |