Special Issue "Selected Papers from the 9th European Conference on Renewable Energy Systems (ECRES2021)"

A special issue of Sustainability (ISSN 2071-1050). This special issue belongs to the section "Energy Sustainability".

Deadline for manuscript submissions: 31 October 2021.

Special Issue Editors

Prof. Dr. Erol Kurt
E-Mail Website
Guest Editor
Department of Electrical and Electronic Engineering, Gazi University, Ankara, Turkey
Interests: design and implementation of energy machines; wind energy; solar energy; energy harvesting
Special Issues and Collections in MDPI journals
Dr. Jose Manuel Lopez-Guede
E-Mail Website
Guest Editor
Department of Systems Engineering and Automatic Control. Faculty of Engineering, University of the Basque Country, Vitoria-Gasteiz, Spain
Interests: photovoltaic energy; wind energy; application of intelligent techniques to modeling and control of renewable energy elements
Special Issues and Collections in MDPI journals

Special Issue Information

Dear Colleagues,

We cordially invite you to participate in the 9th European Conference on Renewable Energy Systems (ECRES2021). The event will be held in Istanbul, Turkey, on 21–23 April 2021, with several universities and research centers from all over the world collaboring to provide technical support for this event. 

The purpose of the ECRES is to bring together researchers, engineers, and natural scientists from all over the world interested in the advances of all branches of renewable energy systems. Presentations on wind, solar, hydrogen, hydro, and geothermal energy, solar concentrating, fuel cells, energy harvesting, and other energy-related topics are welcome. 

The following are specific examples of topics of interest. 

  • Energy materials production and characterization
  • Power electronic systems for renewable energy
  • Conventional energy systems and recovery
  • Engines and their combustion features
  • Offshore and tidal energy systems
  • Energy statistics and efficiency
  • Energy transmission systems
  • Heating/cooling systems
  • Energy/exergy analysis
  • Energy efficiency
  • Wind energy
  • Solar concentrating systems
  • Photovoltaic and their installation
  • Energy harvesters
  • Smart grid
  • Electrical machines
  • Hydroenergy plants
  • Biomass systems
  • Biodiesel systems
  • Combustion
  • Nuclear fusion systems
  • Hydrogen energy systems
  • Fuel cell systems
  • Efficiency in nuclear plants
  • Energy education
  • Energy informatics

Prof. Dr. Erol Kurt
Dr. Jose Manuel Lopez-Guede
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 papers will be 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. Sustainability 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 1900 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
  • wind energy
  • solar energy
  • photovoltaic energy
  • energy materials
  • electromobility
  • energy education
  • conventional energy systems

Published Papers (2 papers)

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Research

Article
Rotating Microtab Implementation on a DU91W250 Airfoil Based on the Cell-Set Model
Sustainability 2021, 13(16), 9114; https://doi.org/10.3390/su13169114 - 14 Aug 2021
Viewed by 270
Abstract
Flow control device modeling is an engaging research field for wind turbine optimization, since in recent years wind turbines have grown in proportions and weight. The purpose of the present work was to study the performance and effects generated by a rotating microtab [...] Read more.
Flow control device modeling is an engaging research field for wind turbine optimization, since in recent years wind turbines have grown in proportions and weight. The purpose of the present work was to study the performance and effects generated by a rotating microtab (MT) implemented on the trailing edge of a DU91W250 airfoil through the novel cell-set (CS) model for the first time via CFD techniques. The CS method is based on the reutilization of an already calculated mesh for the addition of new geometries on it. To accomplish that objective, the required region is split from the main domain, and new boundaries are assigned to the mentioned construction. Three different MT lengths were considered: h = 1%, 1.5% and 2% of the airfoil chord length, as well as seven MT orientations (β): from 0° to −90° regarding the horizontal axis, for five angles of attack: 0°, 2°, 4°, 6° and 9°. The numerical results showed that the increases of the β rotating angle and the MT length (h) led to higher aerodynamic performance of the airfoil, CL/CD = 164.10 being the maximum ratio obtained. All the performance curves showed an asymptotic trend as the β angle reduced. Qualitatively, the model behaved as expected, proving the relationship between velocity and pressure. Taking into consideration resulting data, the cell-set method is appropriate for computational testing of trailing edge rotating microtab geometry. Full article
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Article
Design and Implementation of a Maximum Power Point Tracking System for a Piezoelectric Wind Energy Harvester Generating High Harmonicity
Sustainability 2021, 13(14), 7709; https://doi.org/10.3390/su13147709 - 09 Jul 2021
Viewed by 444
Abstract
In this work, a maximum power point tracking (MPPT) system for its application to a new piezoelectric wind energy harvester (PWEH) has been designed and implemented. The motivation for such MPPT unit comes from the power scales of the piezoelectric layers being in [...] Read more.
In this work, a maximum power point tracking (MPPT) system for its application to a new piezoelectric wind energy harvester (PWEH) has been designed and implemented. The motivation for such MPPT unit comes from the power scales of the piezoelectric layers being in the order of μW. In addition, the output generates highly disturbed voltage waveforms with high total harmonic distortion (THD), thereby high THD values cause a certain power loss at the output of the PWEH system and an intense motivation is given to design and implement the system. The proposed MPPT system is widely used for many different harvesting studies, however, in this paper it has been used at the first time for such a distorted waveform to our best knowledge. The MPPT consists of a rectifier unit storing the rectified energy into a capacitor with a certain voltage called VOC (i.e., the open circuit voltage of the harvester), then a dc-dc converter is used with the help of the MPPT unit using the half of VOC as the critical value for the performance of the control. It has been demonstrated that the power loss is nearly half of the power for the MPPT-free system, the efficiency has been increased with a rate of 98% and power consumption is measured as low as 5.29 μW. Full article
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