Combining pendulum and gyroscopic effects to step-up wave energy extraction in all degrees of freedom

Combining pendulum and gyroscopic effects to step-up wave energy extraction in all degrees of freedom

Giuseppe Giorgi, Fabio Carapellese, Mauro Bonfanti, Sergej Antonello Sirigu

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Abstract. The fight against the global threat of climate change requires, among other actions, to increase the penetration of renewable energy technologies and diversify the energy mix in order to support a resilient energy system that can reach net-zero greenhouse gas emissions. Offshore energy is expected to drive the energy transition, with wave energy having the major role to provide a reliable baseload and reduce the need for storage; however, its techno-economic feasibility requires reduction of costs and increase of energy conversion efficiency. This paper tackles a fundamental innovation of a device’s working principle which, jointly exploiting pendulum and gyroscopic effects, steps-up the overall conversion efficiency in real operational conditions. A recent patent proposes a technological solution that conveniently combines pendulum and gyroscopic effects in order to effectively exploit motion also outside the plane, namely in the three-dimensional space and from all degrees of freedom (DoFs). This paper tackles the endeavour of the analytical formulation of the electro-mechanical conversion system dynamics, considering at first the fully-nonlinear equation of motion, obtained through a Lagrangian approach. Consequently, incremental simplifications are applied to accommodate practical application, based on the study on the relative importance of each term in the equation of motion. Furthermore, preliminary results are produced and discussed, comparing the behaviour in response to 3-DoF to 6-DoF exploitation.

Wave Energy, Gyroscopic Effects, Inertial Effects

Published online 3/17/2022, 6 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Giuseppe Giorgi, Fabio Carapellese, Mauro Bonfanti, Sergej Antonello Sirigu, Combining pendulum and gyroscopic effects to step-up wave energy extraction in all degrees of freedom, Materials Research Proceedings, Vol. 26, pp 679-684, 2023


The article was published as article 109 of the book Theoretical and Applied Mechanics

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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