scholarly journals (Re-)Introducing the IMEJ

2020 ◽  
Vol 3 (1) ◽  
pp. i
Author(s):  
AbuBakr S. Bahaj
Keyword(s):  
Renewable Energy ◽  
Marine Renewable Energy ◽  
Marine Energy ◽  
Energy Community

Two years ago we launched the International Marine Energy Journal (IMEJ) in response to requests and encouragement from the marine renewable energy community to create a journal dedicated to our field of research. Four issues later and I can say that this has been a rewarding and challenging process.

scholarly journals Editorial: Introducing the International Marine Energy Journal

2018 ◽  
Vol 1 (1 (Aug)) ◽  
pp. iii-iv
Author(s):  
A. S. Bahaj (Editor-in-chief IMEJ)
Keyword(s):  
Renewable Energy ◽  
Open Access ◽  
Research And Development ◽  
Tidal Energy ◽  
Research Articles ◽  
Marine Renewable Energy ◽  
Review Articles ◽  
Marine Energy ◽  
Energy Community

The International Marine Energy Journal (IMEJ) deals with research and development in the renewable marine energy arena. It is a bold new initiative by the marine renewable energy community.  It is an open-access only journal where authors maintain copyright over their work. IMEJ justifies its ‘I’ by a genuinely international Editorial Board of renowned experts in the field who are committed to provide the Journal’s global contributors and readers the best in depth coverage of important areas of marine and offshore renewable energy as well as to provide coherence and direction to the journal. IMEJ will publish research articles covering theoretical, experimental and applied studies in the science, engineering and development of wave and tidal energy. It will also publish authoritative and up-to-date review articles.

scholarly journals A Decision Support Tool for Long-Term Planning of Marine Operations in Ocean Energy Projects

2021 ◽  
Vol 9 (8) ◽  
pp. 810
Author(s):  
Francisco X. Correia da Fonseca ◽  
Luís Amaral ◽  
Paulo Chainho
Keyword(s):  
Renewable Energy ◽  
Decision Support ◽  
Decision Support Tool ◽  
Ocean Energy ◽  
Support Tool ◽  
Marine Renewable Energy ◽  
Marine Energy ◽  
Energy Projects ◽  
Selection Algorithms ◽  
Maritime Infrastructure

Ocean energy is a relevant source of clean renewable energy, and as it is still facing challenges related to its above grid-parity costs, tariffs intended to support in a structured and coherent way are of great relevance and potential impact. The logistics and marine operations required for installing and maintaining these systems are major cost drivers of marine renewable energy projects. Planning the logistics of marine energy projects is a highly complex and intertwined process, and to date, limited advances have been made in the development of decision support tools suitable for ocean energy farm design. The present paper describes the methodology of a novel, opensource, logistic and marine operation planning tool, integrated within DTOceanPlus suite of design tools, and responsible for producing logistic solutions comprised of optimal selections of vessels, port terminals, equipment, as well as operation plans, for ocean energy projects. Infrastructure selection logistic functions were developed to select vessels, ports, and equipment for specific projects. A statistical weather window model was developed to estimate operation delays due to weather. A vessel charter rate modeling approach, based on an in-house vessel database and industry experience, is described in detail. The overall operation assumptions and underlying operating principles of the statistical weather window model, maritime infrastructure selection algorithms, and cost modeling strategies are presented. Tests performed for a case study based a theoretical floating wave energy converter produced results in good agreement with reality.

scholarly journals The Permitting, Licensing and Environmental Compliance Process: Lessons and Experiences within U.S. Marine Renewable Energy

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 5048
Author(s):  
Zachary Barr ◽  
Jesse Roberts ◽  
William Peplinski ◽  
Anna West ◽  
Sharon Kramer ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Clean Energy ◽  
Vital Role ◽  
Lessons Learned ◽  
Marine Renewable Energy ◽  
Marine Energy ◽  
Efficiency And Effectiveness ◽  
Practical Experiences ◽  
Permitting Process ◽  
The U.S

The marine renewable energy (MRE; renewable energy captured from waves, tides, ocean currents, the natural flow of water in rivers, and marine thermal gradients, without building new dams or diversions) industry has a vital role in the U.S. clean energy strategy as we progress to meet U.S. electricity and blue economy needs with renewable, domestic energy sources. However, a thorough assessment of the U.S. marine energy permitting process from the viewpoints of both developers that propose projects and regulators that permit them has not been performed. Sharing practical experiences in this new industry is vital to increase the efficiency and effectiveness of the permitting process, identify data and information gaps, develop lessons learned, and advance the industry. This paper is a case study of qualitative findings, lessons learned, and recommendations from guided discussions, workshops, and webinars with both marine renewable energy developers and state and federal regulators that have experience in the permitting process in the U.S.

scholarly journals Detection of Visual Signatures of Marine Mammals and Fish within Marine Renewable Energy Farms using Multibeam Imaging Sonar

2019 ◽  
Vol 7 (2) ◽  
pp. 22 ◽  
Author(s):  
Francisco Francisco ◽  
Jan Sundberg
Keyword(s):  
Renewable Energy ◽  
Marine Mammals ◽  
Environmental Data ◽  
Marine Renewable Energy ◽  
Marine Energy ◽  
Acoustic Images ◽  
Sonar Systems ◽  
Sonar Images ◽  
Imaging Sonar

Techniques for marine monitoring have been greatly evolved over the past decades, making the acquisition of environmental data safer, more reliable and more efficient. On the other hand, the marine renewable energy sector has introduced dissimilar ways of exploring the oceans. Marine energy is mostly harvested in murky and high energetic places where conventional data acquisition techniques are impractical. This new frontier on marine operations brings the need for finding new techniques for environmental data acquisition, processing and analysis. Modern sonar systems, operating at high frequencies, can acquire detailed images of the underwater environment. Variables such as occurrence, size, class and behavior of a variety of aquatic species of fish, birds, and mammals that coexist within marine energy sites can be monitored using imaging sonar systems. Although sonar images can provide high levels of detail, in most of the cases they are still difficult to decipher. In order to facilitate the classification of targets using sonar images, this study introduces a framework of extracting visual features of marine animals that would serve as unique signatures. The acoustic visibility measure (AVM) is here introduced as technique of identification and classification of targets by comparing the observed size with a standard value. This information can be used to instruct algorithms and protocols in order to automate the identification and classification of underwater targets using imaging sonar systems. Using image processing algorithms embedded in Proviwer4 and FIJI software, this study found that acoustic images can be effectively used to classify cod, harbour and grey seals, and orcas through their size, shape and swimming behavior. The sonar images showed that cod occurred as bright, 0.9 m long, ellipsoidal targets shoaling in groups. Harbour seals occurred as bright torpedo-like fast moving targets, whereas grey seals occurred as bulky-ellipsoidal targets with serpentine movements. Orca or larger marine mammals occurred with relatively low visibility on the acoustic images compared to their body size, which measured between 4 m and 7 m. This framework provide a new window of performing qualitative and quantitative observations of underwater targets, and with further improvements, this method can be useful for environmental studies within marine renewable energy farms and for other purposes.

Durability of Polymers and Composites: The Key to Reliable Marine Renewable Energy Production

2018 ◽  
Author(s):  
Peter Davies ◽  
Pierre-Yves Le Gac ◽  
Maelenn Le Gall ◽  
Mael Arhant ◽  
Corentin Humeau
Keyword(s):  
Renewable Energy ◽  
Turbine Blades ◽  
Fatigue Tests ◽  
Synthetic Fiber ◽  
Marine Renewable Energy ◽  
Tidal Turbines ◽  
Marine Energy ◽  
Influence Of Water ◽  
Tidal Turbine ◽  
Significant Cost Reduction

Recovery of marine energy is progressing from the prototype stage to arrays, and all of the systems currently being developed include critical elements manufactured from polymers and composites. Structural MRE (Marine Renewable Energy) components range from composite turbine blades, for floating wind and tidal turbines, to polymer fiber ropes for wave, tidal and floating wind mooring systems. Elastomeric components are also widely used for sealing and protection. In all cases it is essential to understand how seawater diffuses into these polymers and how it affects mechanical properties; this allows appropriate safety factors to be applied without excessive over-conservative design, and can result in significant cost reduction. This paper will present a methodology for evaluating the long term behavior of such components based on accelerated testing. Three examples will be shown to illustrate the approach; tidal turbine blade composites, synthetic fiber rope moorings, and rubber components. In each case the seawater diffusion kinetics will be described first, then the influence of water on mechanical behavior will be quantified for the particular loadings of interest, and finally results from fully coupled fatigue tests in seawater will be discussed.

scholarly journals Recent work and prospective analysis on offshore structures and marine energy harvesting at the Faculty of Engineering of the University of Porto

2021 ◽  
Vol 1201 (1) ◽  
pp. 012043
Author(s):  
F Taveira-Pinto ◽  
P Rosa-Santos ◽  
T. Fazeres-Ferradosa
Keyword(s):  
Renewable Energy ◽  
Energy Harvesting ◽  
Offshore Structures ◽  
Future Research ◽  
Marine Renewable Energy ◽  
The Past ◽  
Energy Group ◽  
Marine Energy ◽  
The University ◽  
Offshore Oil

Abstract Marine energy harvesting and offshore structures for marine renewable energy exploitation rise as a trending topic of both research and industrial activities. However, many challenges are yet to be tackled and solved when it comes to place such equipment and structures at sea. Over the past years the Marine Energy Group at FEUP has been tackling some of those challenges aiming at a better competitiveness of marine renewable energy in comparison to traditional oil & gas sector, which is more mature and developed at this point in time. Additionally, recent findings of this research team have also been applicable to several offshore oil & gas infrastructures. In this work, the latest contributions, projects and research outcomes developed by the team are reviewed and presented towards the enhancement of future research lines and industrial opportunities.

Monitor the Impact of Marine Renewable Energy Devices on Local Environment

2013 ◽  
Vol 448-453 ◽  
pp. 1620-1623
Author(s):  
Jia Liu ◽  
Feng Xu ◽  
Xu Dong An ◽  
Qiao Zhang ◽  
Juan Yang
Keyword(s):  
Renewable Energy ◽  
Local Environment ◽  
Global Scale ◽  
Energy Device ◽  
Energy Devices ◽  
Marine Renewable Energy ◽  
Underwater Environment ◽  
Marine Energy ◽  
Development And Utilization ◽  
The Impact

The development and utilization of clean and renewable marine energy sources will be a way for the development of economy. Although on a global scale the advantages of renewable energy are not in doubt, the impacts on the local environment must be carefully considered. The sonar devices could be used to monitor the underwater environment around the marine renewable energy device. In this paper, a Multi-beam Echo Sounder is introduced. And the measured results in a lake are given, which are shown that this sonar could detection the fish effectively.

scholarly journals Tribological design constraints of marine renewable energy systems

2010 ◽  
Vol 368 (1929) ◽  
pp. 4807-4827 ◽  
Author(s):  
Robert J. K. Wood ◽  
AbuBakr S. Bahaj ◽  
Stephen R. Turnock ◽  
Ling Wang ◽  
Martin Evans
Keyword(s):  
Renewable Energy ◽  
Energy Conversion ◽  
Energy Systems ◽  
Offshore Wind ◽  
Marine Renewable Energy ◽  
Energy Demands ◽  
Marine Energy ◽  
Energy Conversion Systems ◽  
Tidal Streams ◽  
Conversion Technologies

Against the backdrop of increasing energy demands, the threat of climate change and dwindling fuel reserves, finding reliable, diverse, sustainable/renewable, affordable energy resources has become a priority for many countries. Marine energy conversion systems are at the forefront of providing such a resource. Most marine renewable energy conversion systems require tribological components to convert wind or tidal streams to rotational motion for generating electricity while wave machines typically use oscillating hinge or piston within cylinder geometries to promote reciprocating linear motion. This paper looks at the tribology of three green marine energy systems, offshore wind, tidal and wave machines. Areas covered include lubrication and contamination, bearing and gearbox issues, biofouling, cavitation erosion, tribocorrosion, condition monitoring as well as design trends and loading conditions associated with tribological components. Current research thrusts are highlighted along with areas needing research as well as addressing present-day issues related to the tribology of offshore energy conversion technologies.

scholarly journals An Alternative Technique for Ultra-high Resolution Bathymetry and Seabed Inspection for Marine Renewables

2020 ◽  
Author(s):  
Francisco Gemo Albino Francisco ◽  
Jan Sundberg
Keyword(s):  
Renewable Energy ◽  
High Resolution ◽  
Ocean Energy ◽  
Energy Devices ◽  
Energy Applications ◽  
Marine Renewable Energy ◽  
Marine Energy ◽  
Dual Beam ◽  
Energy Projects ◽  
Monitoring Platform

Marine renewable energy technologies have a great potential in supplying clean electricity to millions of people across the globe, if technical and economic conditions are in right. So far, ocean energy projects are commonly started by SMEs or educational institutions with limited budgets. Therefore, any effort to reduce expenses is of great value. One of the areas involving substantial expenses are the inevitable seabed inspection prior to deployment of marine renewable energy device. Detailed seabed inspections can also reduce the risk of associated with deployment of structures on uneven seabed, especially marine renewable energy devices with gravity foundations. By reducing the costs and risks of such surveys prior and during the installation phases, the feasibility of marine renewable energy projects can be more favoured and competitive. In this perspective, this study proposes a cost and time effective technique for seabed surveys. The proposed technique involves the use of high precision and inexpensive sonar systems and underwater optical cameras integrated into a versatile and compact subsea monitoring platform. It also involves simple and practical data acquisition and processing protocols that do not requires hi expertise for operation. The results obtained showed that high resolution bathymetric maps and detailed seabed inspections imagery can be acquired. This study concludes that a simple and inexpensive subsea monitoring platform comprising a multibeam, dual beam and video cameras can be effective for high resolution seabed inspection and bathymetric measurements for marine energy applications.

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