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Inventions
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New Advances and Challenges in Wind Energy Extraction
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New Advances and Challenges in Wind Energy Extraction

A special issue of Inventions (ISSN 2411-5134). This special issue belongs to the section "Inventions and Innovation in Energy and Thermal/Fluidic Science".

Deadline for manuscript submissions: closed (31 March 2020) | Viewed by 22380

Special Issue Editor

Prof. Dr. Eugen Rusu

E-Mail Website
Guest Editor
Department of Mechanical Engineering, University Dunarea de Jos of Galati, Galati, Romania
Interests: ocean energy; marine environment; ocean and coastal engineering; renewable energy; wind turbines; wave energy converters; coastal hazards; sea waves modeling; surf zone hydrodynamics; wave-current interactions
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear colleagues,

We are inviting submissions to a Special Issue of the Inventions open access journal on the subject area of "New Advances and Challenges in Wind Energy Extraction”. Taking into account the very rapid growth of the wind industry, both onshore and offshore, this Special Issue intends to become a premier forum for the dissemination of new advances and challenges in the field of the wind power extraction, presenting theoretical, experimental and applied results. From this perspective, it expected that this Special Issue will bring together leading research in domains of interest from all around the world. Furthermore, through this Special Issue we hope to bring attention to some of the invaluable advances in wind energy extraction and related information to the readers of Inventions.

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

  • Innovative concepts in wind power generation
  • Design and simulation of wind energy generators
  • Turbine design and applications
  • CFD modeling of wind turbines
  • Control of wind energy generators
  • Wind energy and environmental regulations
  • Evaluation of wind power resources in the context of climate change
  • Wind modeling and measurements
  • Economic assessments and cost of energy decreases for wind power
  • Offshore wind
  • Floating wind platforms

Prof. Dr. Eugen Rusu
Guest Editor

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. Inventions 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 1800 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 power
  • Wind turbines
  • Wind models
  • Measurements
  • Smart grids
  • Offshore wind
  • Floating wind
  • Numerical modelling
  • Laboratory modeling
  • Environmental impact
  • Economic assessments

Published Papers (3 papers)

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Research

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18 pages, 8069 KiB  
Article
Aerodynamic Simulations for Floating Darrieus-Type Wind Turbines with Three-Stage Rotors
by Mohamed Amine Dabachi, Abdellatif Rahmouni, Eugen Rusu and Otmane Bouksour
Inventions 2020, 5(2), 18; https://doi.org/10.3390/inventions5020018 - 29 Apr 2020
Cited by 6 | Viewed by 5710
Abstract
Growing energy demand is causing a significant decrease in the world’s hydrocarbon stock in addition to the pollution of our ecosystem. Based on this observation, the search for alternative sorts of energy to fossil fuels is being increasingly explored and exploited. Wind energy [...] Read more.
Growing energy demand is causing a significant decrease in the world’s hydrocarbon stock in addition to the pollution of our ecosystem. Based on this observation, the search for alternative sorts of energy to fossil fuels is being increasingly explored and exploited. Wind energy is experiencing a very important development, and it offers a very profitable opportunity for exploitation since the wind is always available and inexhaustible. Several technical solutions exist to exploit wind energy, such as floating vertical axis wind turbines (F-VAWTs), which provide an attractive and cost-effective solution for exploiting higher resources of offshore wind in deep water areas. Recently, the use of the Darrieus vertical axis wind turbine (VAWT) offshore has attracted increased interest because it offers significant advantages over horizontal axis wind turbines (HAWTs). In this context, this article presents a new concept of floating Darrieus-type straight-bladed turbine with three-stage rotors. A double-multiple stream tube (DMST) model is used for aerodynamic simulations to examine several critical parameters, including, solidity turbine, number of blades, rotor radius, aspect ratio, wind velocity, and rotor height. This study also allows to identify a low solidity turbine (σ = 0.3), offering the best aerodynamic performance, while a two-bladed design is recommended. Moreover, the results also indicate the interest of a variable radius rotor, as well as the variation of the height as a function of the wind speed on the aerodynamic efficiency. Full article
(This article belongs to the Special Issue New Advances and Challenges in Wind Energy Extraction)
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15 pages, 8057 KiB  
Article
A Rolling Electrical Generator Design and Model for Ocean Wave Energy Conversion
by Praveen Damacharla and Ali Jamali Fard
Inventions 2020, 5(1), 3; https://doi.org/10.3390/inventions5010003 - 10 Jan 2020
Cited by 4 | Viewed by 5655
Abstract
Wave and tidal energies are some of the most prominent potential sources of renewable energy. Presently, these energy sources are not being utilized to their maximum extent. In this paper, we present a new conversion mechanism with an innovative electrical energy converter design [...] Read more.
Wave and tidal energies are some of the most prominent potential sources of renewable energy. Presently, these energy sources are not being utilized to their maximum extent. In this paper, we present a new conversion mechanism with an innovative electrical energy converter design that enables the use of wave energy to its maximum potential. The conventional wave energy converter comprises two stages of conversion (kinetic to mechanical and mechanical to electrical), imposing transformation loss that reduces the overall system efficiency. Additionally, the architecture and operational norms are dependent on the availability of shoreline areas, and the convertor is not suitable for all ocean weather conditions. To solve these problems, we have developed a wave energy conversion system that integrates the two stages of power with the minimum number of moving parts. This results in significant reduction of transformation losses that otherwise occur in the process. This paper presents an innovative idea of designing a DC generator that reduces the hierarchy of power conversion levels involved to improve the efficiency. The back and forth motion of the machine means it operates in a two-quadrant generation mode. The machine was constructed as a square box model with windings placed on both the top and bottom stator plates, and the rotor consisted of a field winding placed between these plates with two axes of operation. The electromagnetic field (EMF) induced in the stator plates is due to the resulting flux cutting, which is generated by a rolling object (rotor) in between them. A finite element analysis (FEA) of the machine is also listed to validate the flux linkage and operational efficiency. Additionally, a generator is fabricated to the predetermined design criteria as a proof of concept and the corresponding results are posted in the paper. Additionally, we present the material and cost limitations of this invention and outline some possible future directions. Full article
(This article belongs to the Special Issue New Advances and Challenges in Wind Energy Extraction)
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Review

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24 pages, 6363 KiB  
Review
Wind Turbines Offshore Foundations and Connections to Grid
by Francisco Manzano-Agugliaro, Miguel Sánchez-Calero, Alfredo Alcayde, Carlos San-Antonio-Gómez, Alberto-Jesús Perea-Moreno and Esther Salmeron-Manzano
Inventions 2020, 5(1), 8; https://doi.org/10.3390/inventions5010008 - 28 Jan 2020
Cited by 11 | Viewed by 10281
Abstract
Most offshore wind farms built thus far are based on waters below 30 m deep, either using big diameter steel monopiles or a gravity base. Now, offshore windfarms are starting to be installed in deeper waters and the use of these structures—used for [...] Read more.
Most offshore wind farms built thus far are based on waters below 30 m deep, either using big diameter steel monopiles or a gravity base. Now, offshore windfarms are starting to be installed in deeper waters and the use of these structures—used for oil and gas like jackets and tripods—is becoming more competitive. Setting aside these calls for direct or fixed foundations, and thinking of water depths beyond 50 m, there is a completely new line of investigation focused on the usage of floating structures; TLP (tension leg platform), Spar (large deep craft cylindrical floating caisson), and semisubmersible are the most studied. We analyze these in detail at the end of this document. Nevertheless, it is foreseen that we must still wait sometime before these solutions, based on floating structures, can become truth from a commercial point of view, due to the higher cost, rather than direct or fixed foundations. In addition, it is more likely that some technical modifications in the wind turbines will have to be implemented to improve their function. Regarding wind farm connections to grid, it can be found from traditional designs such as radial, star or ring. On the other hand, for wind generator modeling, classifications can be established, modeling the wind turbine and modeling the wind farm. Finally, for the wind generator control, the main strategies are: passive stall, active stall, and pitch control; and when it is based on wind generation zone: fixed speed and variable speed. Lastly, the trend is to use strategies based on synchronous machines, as the permanent magnet synchronous generator (PMSG) and the wound rotor synchronous generator (WRSG). Full article
(This article belongs to the Special Issue New Advances and Challenges in Wind Energy Extraction)
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