The Control, Modeling, and the Development of Wave Energy Convertors

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Ocean Engineering".

Deadline for manuscript submissions: closed (30 June 2024) | Viewed by 1217

Special Issue Editors


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Guest Editor
Sandia National Laboratories, Albuquerque, NM, USA
Interests: modeling of WEC and marine energy systems; development of supporting software tools and assessment methodologies; powering emerging blue economy markets

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Guest Editor
Department ICEA, University of Padoa, Padua, Italy
Interests: wave–structure interaction, with particular focus on the impulsive loads applied by breaking waves; research and development of floating breakwaters and wave energy converters, including their mooring system; coastal flooding risk, coastal erosion, and the relative mitigation measures
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Special Issue Information

Dear Colleagues,

Recent advancements and demonstrations of co-design methodologies for wave energy converters (WECs) presents exciting new horizons for related areas of inquiry. By designing WEC hulls, power-take-offs, and controllers simultaneously and in coordination it is possible to substantially improve device performance and cost-effectiveness in realistic seas. Obviously, this design approach presents novel challenges, both theoretically and practically. Proper system identification of the relevant WEC dynamics, including drivetrain components and hydrodynamics, is critical to a meaningful understanding of the design space. Attaining optimal dynamic properties over broad ranges of excitation implies innovative approaches to power-take-off design at the component level that can circumvent conventional limitations on efficiency, kinematic range, etc. Understanding the implications of component non-linearities on optimal design, performance, and eventually monetary cost, emphasizes also the importance of accurate modeling and simulation.  

This invited Special Issue will publish research relevant to the above subjects to provide a holistic and comprehensive body or work that will highlight excellent contemporary research and illuminate high-value areas for future study.

Dr. Dominic Forbush
Dr. Luca Martinelli
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Journal of Marine Science and Engineering is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • control co-design
  • optimization
  • system identification
  • power-take-off
  • component selection
  • performance assessment

Published Papers (2 papers)

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Research

22 pages, 6617 KiB  
Article
Assessment of a Hybrid Wind–Wave Energy Converter System in Nearshore Deployment
by Phan Cong Binh, Tri Dung Dang and Kyoung Kwan Ahn
J. Mar. Sci. Eng. 2024, 12(7), 1093; https://doi.org/10.3390/jmse12071093 - 28 Jun 2024
Viewed by 258
Abstract
A modeling technique for a nearshore hybrid wind–wave energy converter system (HWWECS) is presented in this research. The model consists of the buoy, wind system, and generator, allowing simulation of the HWWECS’s behavior in response to varied wave circumstances, such as different wave [...] Read more.
A modeling technique for a nearshore hybrid wind–wave energy converter system (HWWECS) is presented in this research. The model consists of the buoy, wind system, and generator, allowing simulation of the HWWECS’s behavior in response to varied wave circumstances, such as different wave heights and periods. The HWWECS is made up of two buoy units and a wind system that work together to power a generator. The Wave Analysis at Massachusetts Institute of Technology (WAMIT) software is used to calculate the hydrodynamic forces. A variable inertia hydraulic flywheel is used to bring the system into resonance with incident wave frequencies in order to improve power production. Full article
(This article belongs to the Special Issue The Control, Modeling, and the Development of Wave Energy Convertors)
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23 pages, 6760 KiB  
Article
Hybrid Torque Coefficient Control of Average-to-Peak Ratio for Turbine Angular Velocity Reduction in Oscillating-Water-Column-Type Wave Energy Converter
by Hyeongyo Chae and Chan Roh
J. Mar. Sci. Eng. 2024, 12(7), 1080; https://doi.org/10.3390/jmse12071080 - 26 Jun 2024
Viewed by 373
Abstract
Wave energy converters (WECs) have significant potential to meet the increasing energy demands and using an oscillating water column (OWC) is one of the most reliable ways to implement them. The OWC has a simple structure and excellent durability. However, control of the [...] Read more.
Wave energy converters (WECs) have significant potential to meet the increasing energy demands and using an oscillating water column (OWC) is one of the most reliable ways to implement them. The OWC has a simple structure and excellent durability. However, control of the power take-off (PTO) system is difficult due to variability in the input wave energy. In particular, the design and control of the PTO system are complex, as the average-to-peak ratio of the output generation is large. Owing to the nature of the OWC, if the energy above the rating cannot be controlled, the power generated is inevitably reduced due to the decrease in operating time. We propose a method to reduce the angular speed of the turbine by dividing the section according to the input energy and correspondingly changing the torque coefficient, thereby increasing the operating time of the OWC. The control methods for the PTO system of OWC are verified through a 30 kW full-scale experimental device to be installed in a real sea area. The full-scale experimental device consists of an inverter that simulates the mechanical torque of an OWC based on the aerodynamic simulation of an impulse turbine, an induction motor, a permanent magnet synchronous generator, an AC/DC converter, and a battery for the energy storage system. The performance of conventional control methods and the proposed method are compared based on the results of numerical simulations and experiments. We show that the fluctuation in the turbine angular velocity in the proposed method is significantly reduced compared with that in the conventional control methods under regular and irregular wave conditions. Full article
(This article belongs to the Special Issue The Control, Modeling, and the Development of Wave Energy Convertors)
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