Onno Bokhove
A novel wave-energy device with enhanced wave amplification and induction actuator
Bokhove, Onno; Kalogirou, Anna; Henry, David; Thomas, Gareth P.
Authors
Abstract
© 2020, European Wave and Tidal Energy Conference. All rights reserved. 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 waveenergy 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.
Citation
Bokhove, O., Kalogirou, A., Henry, D., & Thomas, G. P. (2020). A novel wave-energy device with enhanced wave amplification and induction actuator. International Marine Energy Journal, 3(1), 37-44. https://doi.org/10.36688/imej.3.37-44
Journal Article Type | Article |
---|---|
Acceptance Date | Mar 27, 2020 |
Online Publication Date | May 14, 2020 |
Publication Date | May 14, 2020 |
Deposit Date | May 27, 2020 |
Publicly Available Date | May 27, 2020 |
Journal | International Marine Energy Journal |
Print ISSN | 2631-5548 |
Electronic ISSN | 2631-5548 |
Publisher | Sustainable Energy Research Group |
Peer Reviewed | Peer Reviewed |
Volume | 3 |
Issue | 1 |
Pages | 37-44 |
DOI | https://doi.org/10.36688/imej.3.37-44 |
Keywords | water-wave focussing, wave-energy buoy, electro-magnetic generator, monolithic variational principle, finite-element modelling |
Public URL | https://nottingham-repository.worktribe.com/output/4517352 |
Publisher URL | https://marineenergyjournal.org/imej/article/view/47 |
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