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Energies
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Innovations in Floating Wind Turbine Design
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Innovations in Floating Wind Turbine Design

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A3: Wind, Wave and Tidal Energy".

Deadline for manuscript submissions: closed (15 March 2023) | Viewed by 7505

Special Issue Editor

Dr. Matthew Hall

E-Mail Website
Guest Editor
National Wind Technology Center, National Renewable Energy Laboratory (NREL), Golden, CO 80401, USA
Interests: floating wind turbine; mooring systems; design optimization; hybrid modeling

Special Issue Information

Dear Colleagues,

Floating offshore wind turbine research is in an exciting phase. Experience from full-scale deployments is accumulating, the range of research topics is continually expanding, and we are seeing design advancements transfer from the lab to the ocean at an impressive rate. Recognizing the high impact of current floating wind turbine design research, this Special Issue aims to spotlight noteworthy research developments in floating wind turbine design innovation. This includes innovative design concepts—from component scale up to array scale—as well as tools and methodologies that can enable future design innovations.

All design aspects specific to floating wind turbine technology are welcome, including substructure, turbine, controller, mooring, and array design. Modeling and testing contributions with specific relevance to improving design methodologies may also be considered. I am looking forward to seeing the innovative research that this topic attracts. Please consider contributing to this Special Issue.

Dr. Matthew Hall
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

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. Energies is an international peer-reviewed open access semimonthly 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

  • Floating wind turbine
  • Floating array
  • Conceptual design
  • Design optimization
  • Cost reduction
  • Offshore renewable energy

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Published Papers (2 papers)

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Research

24 pages, 2838 KiB  
Article
Development of a Genetic Algorithm Code for the Design of Cylindrical Buoyancy Bodies for Floating Offshore Wind Turbine Substructures
by Victor Benifla and Frank Adam
Energies 2022, 15(3), 1181; https://doi.org/10.3390/en15031181 - 5 Feb 2022
Cited by 9 | Viewed by 3254
Abstract
The Levelized Cost of Energy for floating offshore wind must decrease significantly to be competitive with fixed offshore wind projects or even with onshore wind projects. This study focuses on the design optimization of cylindrical buoyancy bodies for floating substructures of offshore wind [...] Read more.
The Levelized Cost of Energy for floating offshore wind must decrease significantly to be competitive with fixed offshore wind projects or even with onshore wind projects. This study focuses on the design optimization of cylindrical buoyancy bodies for floating substructures of offshore wind turbines. The presented work is based on a previously studied buoyancy body design that allows an efficient manufacturing process and integration into different substructures. In this study, an optimization framework based on genetic algorithm is developed to parameterize the buoyancy body’s geometry and optimize its design in terms of cost, considering loads acting on the structure as well as manufacturing and floater specific dimension restrictions. The implementation of the optimization process is detailed, and tested for a given study case. Two structurally different genetic algorithms are considered in order to compare the results obtained and asses the performance of the presented optimization framework. Full article
(This article belongs to the Special Issue Innovations in Floating Wind Turbine Design)
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33 pages, 34639 KiB  
Article
Proposal of a Novel Mooring System Using Three-Bifurcated Mooring Lines for Spar-Type Off-Shore Wind Turbines
by Shi Liu, Yi Yang, Chengyuan Wang, Yuangang Tu and Zhenqing Liu
Energies 2021, 14(24), 8303; https://doi.org/10.3390/en14248303 - 9 Dec 2021
Cited by 3 | Viewed by 2670
Abstract
Floating wind turbine vibration controlling becomes more and more important with the increase in wind turbine size. Thus, a novel three-bifurcated mooring system is proposed for Spar-type floating wind turbines. Compared with the original mooring system using three mooring lines, three-bifurcated sub-mooring-lines are [...] Read more.
Floating wind turbine vibration controlling becomes more and more important with the increase in wind turbine size. Thus, a novel three-bifurcated mooring system is proposed for Spar-type floating wind turbines. Compared with the original mooring system using three mooring lines, three-bifurcated sub-mooring-lines are added into the novel mooring system. Specifically, each three-bifurcated sub-mooring-line is first connected to a Spar-type platform using three fairleads, then it is connected to the anchor using the main mooring line. Six fairleads are involved in the proposed mooring system, theoretically resulting in larger overturning and torsional stiffness. For further improvement, a clump mass is attached onto the main mooring lines of the proposed mooring system. The wind turbine surge, pitch, and yaw movements under regular and irregular waves are calculated to quantitatively examine the mooring system performances. A recommended configuration for the proposed mooring system is presented: the three-bifurcated sub-mooring-line and main mooring line lengths should be (0.0166, 0.0111, 0.0166) and 0.9723 times the total mooring line length in the traditional mooring system. The proposed mooring system can at most reduce the wind turbine surge movement 37.15% and 54.5% when under regular and irregular waves, respectively, and can at most reduce the yaw movement 30.1% and 40% when under regular and irregular waves, respectively. Full article
(This article belongs to the Special Issue Innovations in Floating Wind Turbine Design)
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