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Renewable Energies and Ocean Technologies: Challenges to the Green and...
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Renewable Energies and Ocean Technologies: Challenges to the Green and Blue Economy

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 (31 December 2021) | Viewed by 20599

Special Issue Editors

Prof. Dr. José António Correia

E-Mail Website
Guest Editor
Department of Civil Engineering, University of Porto, 4200-465 Porto, Portugal
Interests: numerical modeling of engineering structures and structural components (offshore applications, steel bridges, pressure vessels, pipelines, wind turbine towers, etc.); mathematical problems in fatigue and fracture; mechanics of solids and structures; metals materials and structures; numerical fracture mechanics and crack growth; local approaches; finite element methods in structural mechanics applications; computer-aided structural integrity
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Shun-Peng Zhu

E-Mail Website1 Website2
Guest Editor
Center for System Reliability and Safety, University of Electronic Science and Technology of China, Chengdu 611731, China
Interests: structural integrity and reliability analysis; damage tolerance design and life prediction; artificial intelligence and health assessment
Special Issues, Collections and Topics in MDPI journals
Dr. Nicholas Fantuzzi

E-Mail Website
Guest Editor
Department of Civil, Chemical, Environmental, and Materials Engineering, University of Bologna, Viale del Risorgimento 2, 40136 Bologna, Italy
Interests: modeling of offshore structures and offshore structural components; structural theories of plates and applied mathematical modeling; mechanics of solids and structures; study of composite laminated structures and advanced composite materials; fracture mechanics and crack propagation and initiation; applied numerical methods such as finite element method and mesh-free element method
Special Issues, Collections and Topics in MDPI journals
Dr. Yuming Liu

E-Mail Website
Guest Editor
Massachusetts Institute of Technology (MIT), Cambridge, MA, USA
Interests: design and analysis of ships and marine structures; prediction of ocean environments; hydrodynamics of multiphase flow in pipes; vortical flow dynamics; application of fluid dynamics to music instrument design
Prof. Dr. Lance Manuel

E-Mail Website
Guest Editor
Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, Austin, TX, USA
Interests: reliability of offshore structures; offshore renewable energy; floating platforms; uncertainty quantification
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The earth is composed mostly of oceans, which are the least explored resources on our planet. The European Council predicts that by 2050, 50% of our electricity needs will come from marine renewable energy systems.

With the threat of global warming and climate change, there is an urgent need to harness alternative energy sources free of carbon dioxide pollution and not derived from fossil fuels; wind energy, wave energy, and green hydrogen offer proven and economic alternatives.

To limit fracking, exploiting tar sands for oil and gas, and other environmentally harmful fossil fuel mining, we need other renewable forms of energy to become cheaper and more convenient to use than fossil fuels. Of all the renewable forms of energy (wind, solar, geothermal, hydroelectric, and green hydrogen), wind and solar have shown very positive growth due to significant economic and technological advancements.

This Special Issue will be a discussion of new research concepts, equipment, technology, materials and structures, and other scientific advances within the field of power generation and transmission, estuarine, coastal, offshore, and deepwater engineering with particular reference to developments, exploration, installation, application, and utilization of offshore resources.

This Special Issue also covers topics related to research, design, and construction of wind engineering and renewable energy, computational mechanics and design optimization, instrumentation and testing, structural integrity and life extension of structures, wind and wave dynamics, sedimentation, structural/stress analysis, soil mechanics, material research, and economic, environmental, and legal aspects.

The Guest Editors of this Special Issue on renewable energies and ocean technologies hope to include contributions from engineers, metallurgists, and scientists, among others, allowing for a multidisciplinary discussion.

Dr. José A.F.O. Correia
Prof. Shun-Peng Zhu
Dr. Nicholas Fantuzzi
Dr. Yuming Liu
Prof. Dr. Lance Manuel
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. 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

  • Wind engineering, renewable energy, and green hydrogen
  • Advanced computational methods
  • Computational mechanics and design optimization
  • Structural integrity and life extension
  • Applications and case studies
  • Offshore structural systems
  • Fixed and floating marine systems
  • Submarines and robotics systems
  • Cables, pipelines, and risers
  • Turbomachinery
  • Power and energy systems
  • Logistic technologies
  • Oil and gas technologies
  • Underwater technology
  • Waste management
  • Environmental protections
  • Economic, environmental, and legal policies

Published Papers (4 papers)

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Research

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26 pages, 12578 KiB  
Article
An FTC Design via Multiple SOGIs with Suppression of Harmonic Disturbances for Five-Phase PMSG-Based Tidal Current Applications
by Zhuo Liu, Tianhao Tang, Azeddine Houari, Mohamed Machmoum and Mohamed Fouad Benkhoris
J. Mar. Sci. Eng. 2021, 9(6), 574; https://0-doi-org.brum.beds.ac.uk/10.3390/jmse9060574 - 26 May 2021
Cited by 2 | Viewed by 2268
Abstract
This paper firstly adopts a fault accommodation structure, a five-phase permanent magnet synchronous generator (PMSG) with trapezoidal back-electromagnetic forces, in order to enhance the fault tolerance of tidal current energy conversion systems. Meanwhile, a fault-tolerant control (FTC) method is proposed using multiple second-order [...] Read more.
This paper firstly adopts a fault accommodation structure, a five-phase permanent magnet synchronous generator (PMSG) with trapezoidal back-electromagnetic forces, in order to enhance the fault tolerance of tidal current energy conversion systems. Meanwhile, a fault-tolerant control (FTC) method is proposed using multiple second-order generalized integrators (multiple SOGIs) to further improve the systematic fault tolerance. Then, additional harmonic disturbances from phase current or back-electromagnetic forces in original and Park’s frames are characterized under a single-phase open condition. Relying on a classical field-oriented vector control scheme, fault-tolerant composite controllers are then reconfigured using multiple SOGIs by compensating q-axis control commands. Finally, a real power-scale simulation setup with a gearless back-to-back tidal current energy conversion chain and a small power-scale laboratory prototype in machine side are established to comprehensively validate feasibility and fault tolerance of the proposed method. Simulation results show that the proposed method is able to suppress the main harmonic disturbances and maintain a satisfactory fault tolerance when third harmonic flux varies. Experimental results reveal that the proposed model-free fault-tolerant design is simple to implement, which contributes to better fault-tolerant behaviors, higher power quality and lower copper losses. The main advantage of the multiple SOGIs lies in convenient online implementation and efficient multi-harmonic extractions, without considering system’s model parameters. The proposed FTC design provides a model-free fault-tolerant solution to the energy harvested process of actual tidal current energy conversion systems under different working conditions. Full article
(This article belongs to the Special Issue Renewable Energies and Ocean Technologies: Challenges to the Green and Blue Economy)
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17 pages, 4147 KiB  
Article
Study on Reactive Power Compensation Strategies for Long Distance Submarine Cables Considering Electrothermal Coordination
by Gang Liu, Mingming Fan, Pengyu Wang and Ming Zheng
J. Mar. Sci. Eng. 2021, 9(1), 90; https://0-doi-org.brum.beds.ac.uk/10.3390/jmse9010090 - 15 Jan 2021
Cited by 14 | Viewed by 4678
Abstract
Long-distance high voltage alternating current (AC) submarine cables are widely used to connect offshore wind farms and land power grids. However, the transmission capacity of the submarine cable is limited by the capacitive charging current. This paper analyzes the impacts of reactive power [...] Read more.
Long-distance high voltage alternating current (AC) submarine cables are widely used to connect offshore wind farms and land power grids. However, the transmission capacity of the submarine cable is limited by the capacitive charging current. This paper analyzes the impacts of reactive power compensation in different positions on the current distribution on long-distance submarine cable transmission lines, and tests the rationality of the existing reactive power compensation schemes based on electrothermal coordination (ETC). Research shows that compensation at the sending end has obvious impacts on current distribution along the cable, and the maximum current occurs at the sending or receiving end. Moreover, the reactive power compensation at sending end will reduce the current at receiving end of the line. On the contrary, it will increase the current at sending end. Compared with the directly buried laying method of the submarine cable in the landing section, the cable trench laying method can increase the cable ampacity of the landing section and reduce the reactive power compensation capacity at the sending end. The ampacity is the current representation of the thermal limits of the cable. ETC exploits the cable ampacity to coordinate current distribution on transmission lines under existing reactive power compensation schemes, thus optimizing the reactive power compensation schemes and avoiding the bottleneck point of cable ampacity. Full article
(This article belongs to the Special Issue Renewable Energies and Ocean Technologies: Challenges to the Green and Blue Economy)
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16 pages, 4450 KiB  
Article
Static and Dynamic Reliability Analysis of Laterally Loaded Pile Using Probability Density Function Method
by Min Xiong and Yu Huang
J. Mar. Sci. Eng. 2020, 8(12), 994; https://0-doi-org.brum.beds.ac.uk/10.3390/jmse8120994 - 05 Dec 2020
Cited by 3 | Viewed by 2376
Abstract
Pile foundation is one of the common foundation forms in marine geotechnical engineering, especially in wind power engineering. Its operation safety is seriously affected by many uncertainties, such as the randomness of ground motion in intensity and frequency. The stochastic reliability analysis method [...] Read more.
Pile foundation is one of the common foundation forms in marine geotechnical engineering, especially in wind power engineering. Its operation safety is seriously affected by many uncertainties, such as the randomness of ground motion in intensity and frequency. The stochastic reliability analysis method can better characterize these uncertainties in the evaluation of the safety performance of pile foundation. The probability density functions (PDFs) of stochastic systems are important prerequisites for reliability analysis. However, for geotechnical problems, the coupling between parametric and excitation randomness and the nonlinear mechanical properties of rock and soil make it very difficult to obtain the associated PDFs. Instead, the probability density evolution method (PDEM) is introduced and is used to investigate the static and dynamic reliability of laterally loaded piles as an example of a geotechnical problem. Compared with Monte Carlo stochastic simulations, PDEM-based computing is shown to be highly efficient when applied to the seismic design of pile in geotechnical engineering, and its calculation efficiency is 20 times of the former for the seismic dynamic reliability of pile foundation. This study provides a new reference for the efficient design and safety evaluation of offshore pile foundation engineering based on static and dynamic reliability of multiple random factors. Full article
(This article belongs to the Special Issue Renewable Energies and Ocean Technologies: Challenges to the Green and Blue Economy)
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Review

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20 pages, 1181 KiB  
Review
Review of Recent Offshore Wind Turbine Research and Optimization Methodologies in Their Design
by Jieyan Chen and Moo-Hyun Kim
J. Mar. Sci. Eng. 2022, 10(1), 28; https://0-doi-org.brum.beds.ac.uk/10.3390/jmse10010028 - 28 Dec 2021
Cited by 43 | Viewed by 9564
Abstract
As international efforts to address climate change grow, an increasing number of countries and companies have put forward a clear “net zero” goal through accelerated renewable-energy development. As a renewable energy source, offshore wind energy has received particular attention from many countries and [...] Read more.
As international efforts to address climate change grow, an increasing number of countries and companies have put forward a clear “net zero” goal through accelerated renewable-energy development. As a renewable energy source, offshore wind energy has received particular attention from many countries and is a highly active research area. However, the design of offshore wind turbine structures faces challenges due to the large and complex design parameter space as well as different operational requirements and environmental conditions. Advanced optimization technology must be employed to address these challenges. Using an efficient optimization algorithm, it is possible to obtain optimized parameters for offshore wind turbine structures, balancing energy generation performance and the life of the floating wind turbine. This paper presents a review of the types and fundamental principles of several critical optimization technologies along with their application in the design process, with a focus on offshore wind turbine structures. It concludes with a discussion of the future prospects of optimization technology in offshore wind research. Full article
(This article belongs to the Special Issue Renewable Energies and Ocean Technologies: Challenges to the Green and Blue Economy)
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