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Special Issues
De-Risking Marine Renewable Energy: Testing and Modelling Challenges
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De-Risking Marine Renewable Energy: Testing and Modelling Challenges

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Physical Oceanography".

Deadline for manuscript submissions: closed (31 March 2020) | Viewed by 5160

Special Issue Editors

Dr. Francesco Salvatore

E-Mail Website
Guest Editor
CNR-INM, National Research Council—Institute of Marine Engineering, Via di Vallerano 139, 00128 Rome, Italy
Interests: marine propulsion; hydrokinetic turbines; hydrodynamics; cavitation; CFD validation; design
Special Issues, Collections and Topics in MDPI journals
Dr. Giuseppina Colicchio

E-Mail Website
Guest Editor
CNR-INM, Institute of Marine Engineering, Italian National Research Council, Rome, Italy
Interests: ocean engineering; ocean renewable energy; hydrodynamics; waves; currents

Special Issue Information

Dear Colleagues,

The exploitation of marine energy from waves, currents, tidal range, thermal and salinity gradients is expected to bring a significant contribution to the renewable energy mix in the near future.

Huge efforts are being made by developers to increase technology maturity, demonstrating cost-effectiveness, safety and environmental friendliness of large scale installations at sea.

This Special Issue aims to collect contributions reflecting the state-of-the-art of testing techniques and modelling methodologies that are currently used to support design, assessment and optimization of devices.

The objective is to provide an updated picture of the capability to simulate, by experiments and/or computational modelling, the complex conditions affecting device operations at sea, including those involving multi-disciplinary features.

Contributions will highlight significant advancements, and will help to stimulate discussion on existing gaps and areas in need of further development.

Dr. Francesco Salvatore
Dr. Giuseppina Colicchio
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

  • Ocean renewable energy
  • wave energy
  • tidal energy
  • salinity and thermal gradient
  • experimental and numerical techniques
  • hydrodynamics
  • fluid–structure interaction
  • PTO systems

Published Papers (2 papers)

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Research

23 pages, 4130 KiB  
Article
Uncertainty Quantification in Mooring Cable Dynamics Using Polynomial Chaos Expansions
by Guilherme Moura Paredes, Claes Eskilsson and Allan P. Engsig-Karup
J. Mar. Sci. Eng. 2020, 8(3), 162; https://doi.org/10.3390/jmse8030162 - 2 Mar 2020
Cited by 11 | Viewed by 2905
Abstract
Mooring systems exhibit high failure rates. This is especially problematic for offshore renewable energy systems, like wave and floating wind, where the mooring system can be an active component and the redundancy in the design must be kept low. Here we investigate how [...] Read more.
Mooring systems exhibit high failure rates. This is especially problematic for offshore renewable energy systems, like wave and floating wind, where the mooring system can be an active component and the redundancy in the design must be kept low. Here we investigate how uncertainty in input parameters propagates through the mooring system and affects the design and dynamic response of mooring and floaters. The method used is a nonintrusive surrogate based uncertainty quantification (UQ) approach based on generalized Polynomial Chaos (gPC). We investigate the importance of the added mass, tangential drag, and normal drag coefficient of a catenary mooring cable on the peak tension in the cable. It is found that the normal drag coefficient has the greatest influence. However, the uncertainty in the coefficients plays a minor role for snap loads. Using the same methodology we analyze how deviations in anchor placement impact the dynamics of a floating axi-symmetric point-absorber. It is shown that heave and pitch are largely unaffected but surge and cable tension can be significantly altered. Our results are important towards streamlining the analysis and design of floating structures. Improving the analysis to take into account uncertainties is especially relevant for offshore renewable energy systems where the mooring system is a considerable portion of the investment. Full article
(This article belongs to the Special Issue De-Risking Marine Renewable Energy: Testing and Modelling Challenges)
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11 pages, 2498 KiB  
Article
A Numerical Investigation of the Plunging Phenomenon of Cold Water Discharged from Ocean Thermal Energy Conversion Systems
by Dan Hua, Takeshi Yasunaga and Yasuyuki Ikegami
J. Mar. Sci. Eng. 2020, 8(3), 155; https://doi.org/10.3390/jmse8030155 - 28 Feb 2020
Cited by 1 | Viewed by 1928
Abstract
The main role of cold water discharged from ocean thermal energy conversion (OTEC) systems is that deep ocean water, which is dense and nutrient-rich, is released through the condenser and discharged into the ocean surface. We present a numerical simulation in which a [...] Read more.
The main role of cold water discharged from ocean thermal energy conversion (OTEC) systems is that deep ocean water, which is dense and nutrient-rich, is released through the condenser and discharged into the ocean surface. We present a numerical simulation in which a cold-water is discharged into a temperature-stratified fluid. A semi-empirical formula relating the outlet flow and the plunging depth was obtained by model analysis, and the k multiplier was 1.15. The model results are consistent with the experimental data. Full article
(This article belongs to the Special Issue De-Risking Marine Renewable Energy: Testing and Modelling Challenges)
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