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Advances in Ocean Energy Technologies and Applications
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Advances in Ocean Energy Technologies and Applications

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A: Sustainable Energy".

Deadline for manuscript submissions: 15 October 2025 | Viewed by 3294

Special Issue Editors

Dr. Lele Yang

E-Mail Website
Guest Editor
School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China
Interests: marine renewable energy; marine oil and gas exploitation; deep-sea mining; multiphase flow
Prof. Dr. Fengmei Jing

E-Mail Website
Guest Editor
School of Mechanical and Engineering, Beijing Institute of Technology, Beijing 100081,China
Interests: design and performance prediction of tidal current energy turbines; design and performance prediction of wave energy converters; hydrodynamic loads prediction of offshore wind turbines
Prof. Dr. Wanhai Xu

E-Mail Website
Guest Editor
State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300350, China
Interests: subsea pipelines and risers; flow-induced vibration; marine renewable energy; vibration control and utilization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue aims to provide a comprehensive overview of the latest developments in the field of ocean energy, with a particular focus on marine renewable energy, marine oil and gas exploitation, and deep-sea mining. This collection of papers will offer valuable insights into the innovative technologies and applications that are driving progress in harnessing the vast potential of the world's oceans for sustainable energy production and resource extraction.

This Special Issue will feature contributions from leading experts and researchers, presenting cutting-edge research, technological advancements, and case studies in the field. Topics covered include but are not limited to wave energy, tidal energy, and offshore wind energy, as well as emerging concepts such as ocean thermal energy conversion and salinity gradient power. Additionally, this Special Issue will delve into the challenges and opportunities associated with marine oil and gas exploitation, exploring new methods and technologies aimed at enhancing efficiency and minimizing environmental impact. Furthermore, this Special Issue will address the growing interest in deep-sea mining and its implications for resource exploration and exploitation. It will examine the latest advancements in deep-sea mining technologies, environmental considerations, and regulatory frameworks, shedding light on the evolving landscape of this emerging industry.

Overall, this Special Issue on "Advances in Ocean Energy Technologies and Applications" promises to be a valuable resource for researchers, practitioners, and policymakers seeking to stay abreast of the latest developments and trends shaping the future of ocean-based energy and resource sectors.

Dr. Lele Yang
Prof. Dr. Fengmei Jing
Prof. Dr. Wanhai Xu
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 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

  • renewable energy
  • offshore oil and gas exploitation
  • deep-sea mining
  • ocean energy technology
  • energy conversion

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Published Papers (3 papers)

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Research

16 pages, 3467 KiB  
Article
An Experimental Study on Wave Force and Run-Up of Wind Turbine Foundation on Breakwater Under Wave Action
by Jiangnan Chen, Longzai Ge, Yanan Xu and Songgui Chen
Energies 2025, 18(7), 1676; https://doi.org/10.3390/en18071676 - 27 Mar 2025
Viewed by 239
Abstract
With the development and utilization of offshore wind turbines in the field of existing breakwaters, its foundation is affected by the dual effects of waves and different structures. In order to ensure structural safety and evaluate the impact on breakwaters, A6 and A7 [...] Read more.
With the development and utilization of offshore wind turbines in the field of existing breakwaters, its foundation is affected by the dual effects of waves and different structures. In order to ensure structural safety and evaluate the impact on breakwaters, A6 and A7 wind turbine foundations in the breakwater head area were selected, and a 1:40 scale model test was conducted. The results showed the following: (1) After the implementation of the wind turbine project, the wave height of the breakwater only increased by 10%, and its stability was basically not affected; (2) The basic design elevation does not meet the requirements for run-up, and it is feasible to raise it by 1.0~1.5 m; (3) The wave force on A7 foundation is 2~4 times that of A6, and after the elevation is raised, the wave force decreases by 50%. Therefore, the structural design can be considered to adopt differentiated design according to different positions and types; (4) The experimental results are 1.2~1.5 times the standard formula calculation results, and the research results can enrich the current standard calculation basis. This study can not only solve practical problems in engineering but also provide basic data for similar projects in the future. Full article
(This article belongs to the Special Issue Advances in Ocean Energy Technologies and Applications)
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16 pages, 4876 KiB  
Article
Application of the ALRW-DDPG Algorithm in Offshore Oil–Gas–Water Separation Control
by Xiaoyong He, Han Pang, Boying Liu and Yuqing Chen
Energies 2024, 17(18), 4623; https://doi.org/10.3390/en17184623 - 14 Sep 2024
Cited by 1 | Viewed by 1225
Abstract
With the offshore oil–gas fields entering a decline phase, the high-efficiency separation of oil–gas–water mixtures becomes a significant challenge. As essential equipment for separation, the three-phase separators play a key role in offshore oil–gas production. However, level control is critical in the operation [...] Read more.
With the offshore oil–gas fields entering a decline phase, the high-efficiency separation of oil–gas–water mixtures becomes a significant challenge. As essential equipment for separation, the three-phase separators play a key role in offshore oil–gas production. However, level control is critical in the operation of three-phase gravity separators on offshore facilities, as it directly affects the efficacy and safety of the separation process. This paper introduces an advanced deep deterministic policy gradient with the adaptive learning rate weights (ALRW-DDPG) control algorithm, which improves the convergence and stability of the conventional DDPG algorithm. An adaptive learning rate weight function has been meticulously designed, and an ALRW-DDPG algorithm network has been constructed to simulate three-phase separator liquid level control. The effectiveness of the ALRW-DDPG algorithm is subsequently validated through simulation experiments. The results show that the ALRW-DDPG algorithm achieves a 15.38% improvement in convergence rate compared to the traditional DDPG algorithm, and the control error is significantly smaller than that of PID and DDPG algorithms. Full article
(This article belongs to the Special Issue Advances in Ocean Energy Technologies and Applications)
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14 pages, 4537 KiB  
Article
Numerical Simulation Method of Hydraulic Power Take-Off of Point-Absorbing Wave Energy Device Based on Simulink
by Fengmei Jing, Song Wang, Tonio Sant, Christopher Micallef and Jean Paul Mollicone
Energies 2024, 17(14), 3590; https://doi.org/10.3390/en17143590 - 22 Jul 2024
Viewed by 1251
Abstract
Wave energy has a high energy density and strong predictability, presenting encouraging prospects for development. So far, there are dozens of different wave energy devices (WECs), but the mechanism that ultimately converts wave energy into electrical energy in these devices has always been [...] Read more.
Wave energy has a high energy density and strong predictability, presenting encouraging prospects for development. So far, there are dozens of different wave energy devices (WECs), but the mechanism that ultimately converts wave energy into electrical energy in these devices has always been the focus of research by scholars from various countries. The energy conversion mechanism in wave energy devices is called PTO (power take-off). According to different working principles, PTOs can be classified into the linear motor type, hydraulic type, and mechanical type. Hydraulic PTOs are characterized by their high efficiency, low cost, and simple installation. They are widely used in the energy conversion links of various wave energy devices. However, apart from experimental methods, there is currently almost no concise numerical method to predict and evaluate the power generation performance of hydraulic PTO. Therefore, based on the working principle of hydraulic PTO, this paper proposes a numerical method to simulate the performance of a hydraulic PTO using MATLAB(2018b) Simulink®. Using a point-absorption wave energy device as a carrier, a float hydraulic system power-generation numerical model is built. The method is validated by comparison with previous experimental results. The predicted power generation and conversion efficiency of the point-absorption wave energy device under different regular and irregular wave conditions are compared. Key factors affecting the power generation performance of the device were investigated, providing insight for the subsequent optimal design of the device, which is of great significance to the development and utilization of wave energy resources. Full article
(This article belongs to the Special Issue Advances in Ocean Energy Technologies and Applications)
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