Ermakov, Andrei and Ringwood, John and Marie, Alice (2022) Some Fundamental Results for Cyclorotor Wave Energy Converters for Optimum Power Capture. IEEE Transactions on Sustainable Energy, 13 (3). pp. 1869-1872. ISSN 1949-3029

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Abstract

Cyclorotor-based wave energy converters (WECs) present a relatively new and innovative paradigm for wave energy harvesting. Their operational principle is based on the generation of lift forces on the rotating hydrofoils due to their interaction with wave-induced circulation of water particles. As a result, relatively little is known about their optimal operation. To date, cyclorotor device performance has been measured by the power of waves radiated by the WEC, while a constant rotational velocity, consistent with the wave frequency, is employed. In this note we show (a) that variation of the cyclorotor velocity within the incoming monochromatic wave period significantly increases the generated mechanical power, while (b) optimising wave cancellation is at odds with the maximisation of shaft power. To optimise shaft power, the letter adopts a multi-harmonic solution for variable cyclorotor rotation rate, inspired by methods developed in other WEC domains.

Item Type:	Article
Keywords:	Cyclorotor; optimal control; performance metrics; velocity profile; wave energy converter;
Academic Unit:	Faculty of Science and Engineering > Electronic Engineering Faculty of Science and Engineering > Research Institutes > Centre for Ocean Energy Research
Item ID:	16317
Identification Number:	https://doi.org/10.1109/TSTE.2022.3171711
Depositing User:	Professor John Ringwood
Date Deposited:	15 Jul 2022 08:39
Journal or Publication Title:	IEEE Transactions on Sustainable Energy
Publisher:	Institute of Electrical and Electronics Engineers (IEEE)
Refereed:	Yes
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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