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Advances in Marine Renewable Energy Utilization and Offshore Storage Technologies

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: 25 March 2026 | Viewed by 1640

Special Issue Editors


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Guest Editor
College of Engineering, Ocean University of China, Qingdao 266100, China
Interests: marine renewable energy utilization; offshore storage technologies; smart energy

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Guest Editor
School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China
Interests: renewable energy integration; power systems analysis; multi-energy systems
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Special Issue Information

Dear Colleagues,

The transition to sustainable energy systems has placed marine renewable energy at the forefront of global innovation. Oceans cover over 70% of the Earth’s surface, offering vast potential for harnessing energy through offshore wind, tidal, wave, and ocean thermal technologies. Coupled with advancements in offshore energy storage solutions, these technologies are critical to achieving decarbonization goals, enhancing energy security, and enabling resilient coastal and offshore infrastructure. However, the harsh marine environment, technological complexity, and integration challenges demand continuous breakthroughs in materials, system design, energy conversion efficiency, and storage methodologies. Furthermore, the growing emphasis on hybrid systems, digitalization, and environmental sustainability is driving research toward smarter, more adaptive, and ecologically responsible solutions.

This Special Issue seeks to showcase cutting-edge research and developments in marine renewable energy technologies and their associated offshore storage systems. We invite contributions that address theoretical advancements, experimental validations, computational modeling, and real-world applications aimed at optimizing performance, reliability, and scalability in marine environments.

Topics of interest for publication include, but are not limited to, the following:

  • Marine energy utilization technologies: Offshore wind energy, tidal energy, wave energy, ocean thermal energy, and salinity gradient energy.
  • Offshore energy storage solutions: Offshore compressed air energy storage, hydrogen production/storage, battery technologies, and hybrid storage systems for grid stability.
  • System integration and grid connectivity: Hybrid marine energy farms, floating platforms, subsea transmission technologies, and microgrid applications.
  • Economic and policy frameworks: Cost-reduction strategies, levelized cost of energy (LCOE) optimization, and regulatory challenges for offshore deployment.
  • Emerging concepts: Floating solar farms, blue energy synergies, and multi-purpose offshore platforms (e.g., energy production combined with aquaculture).

We welcome original research articles, comprehensive reviews, and case studies that push the boundaries of innovation in this rapidly evolving field.

Prof. Dr. Ji Zhang
Dr. Hui Li
Guest Editors

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 250 words) can be sent to the Editorial Office for assessment.

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

  • offshore wind energy
  • tidal energy conversion
  • wave energy harvesting
  • ocean thermal energy conversion (OTEC)
  • energy storage
  • hydrogen storage systems
  • corrosion-resistant coatings
  • grid-connected microgrids
  • offshore energy policy frameworks

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Published Papers (2 papers)

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Research

26 pages, 14492 KB  
Article
Experimental and Numerical Study of a Towing Test for a Barge-Type Floating Offshore Wind Turbine
by Samuel Davis, Anthony Viselli and Amrit Verma
Energies 2025, 18(19), 5228; https://doi.org/10.3390/en18195228 - 1 Oct 2025
Viewed by 655
Abstract
Several experimental and numerical studies have been conducted on the towing behavior of floating offshore wind turbines (FOWTs); however, these studies mainly focus on tension-leg platform (TLP) and semi-submersible designs with cylindrical features. The University of Maine’s VolturnUS+ concept is a cruciform-shaped barge-type [...] Read more.
Several experimental and numerical studies have been conducted on the towing behavior of floating offshore wind turbines (FOWTs); however, these studies mainly focus on tension-leg platform (TLP) and semi-submersible designs with cylindrical features. The University of Maine’s VolturnUS+ concept is a cruciform-shaped barge-type FOWT with distinctive hydrodynamic properties that have not been characterized in previous research. This study presents basin-scale experiments that characterize the hydrodynamic drag properties of the VolturnUS+ platform, as well as observing the motion behavior of the platform and added resistance during towing in calm water and waves. The towing experiments are conducted in two towing configurations, with differing platform orientations and towline designs. The basin experiments are supplemented with a numerical study using computational fluid dynamic (CFD) simulations to explore flow-induced motion (FIM) on the platform during towing. In both the experiments and the CFD simulations, it was determined that the towing configuration significantly impacted the drag and motion characteristics of the platform, with the cruciform shape producing FIM phenomena. Observations from the towing tests confirmed the feasibility of towing the VolturnUS+ platform in the two orientations. The results and observations developed from the experimental and numerical towing studies will be used to inform numerical models for planning towing operations, as well as develop informed recommendations for towing similar cruciform-shaped structures in the future. Full article
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21 pages, 3570 KB  
Article
Performance Studies on a Scaled Model of Dual Oscillating-Buoys WEC with One Pneumatic PTO
by Peiyu Liu, Xiang Rao, Bijun Wu, Zhiwen Yuan and Fuming Zhang
Energies 2025, 18(15), 4151; https://doi.org/10.3390/en18154151 - 5 Aug 2025
Viewed by 647
Abstract
A hybrid wave energy conversion (WEC) system, integrating a backward bent duct buoy (BBDB) with an oscillating buoy (OB) via a flexible mooring chain, is introduced in this study. Unlike existing hybrid WECs, the proposed system dispenses with rigid mechanical linkages and enables [...] Read more.
A hybrid wave energy conversion (WEC) system, integrating a backward bent duct buoy (BBDB) with an oscillating buoy (OB) via a flexible mooring chain, is introduced in this study. Unlike existing hybrid WECs, the proposed system dispenses with rigid mechanical linkages and enables flexible offshore deployment. Flared BBDB and buoy models with spherical, cylindrical, and semi-capsule shapes are designed and tested experimentally in a wave flume using both regular and irregular wave conditions. The effects of nozzle ratio (NR), coupling distance, buoy draft, and buoy geometry are systematically examined to investigate the hydrodynamic performance and energy conversion characteristics. It is found that NR at 110 under unidirectional airflow produces an optimal balance between pressure response, free surface displacement, and energy conversion efficiency. Energy extraction is significantly influenced by the coupling distance, with the hybrid system achieving maximum performance at a specific normalized spacing. The semi-capsule buoy improves power extraction ability and expands effective bandwidth due to asymmetric shape and coupled motion. These findings provide valuable insights into the coupling mechanism and geometric optimization for hybrid WECs. Full article
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