Special Issue "Renewable Energy 2018"

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Energy".

Deadline for manuscript submissions: 15 April 2018

Special Issue Editor

Guest Editor
Prof. Dr. Tomonobu Senjyu

Department of Electrical and Electronic Engineering, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan
Website | E-Mail
Phone: +81-98-895-8686
Fax: +81 895 8686
Interests: Renewable energy; Power systems; Power electronics; System control; Optimization; Smart grid; Smart house; Motor drives; Artificial intelligence; Electric vehicles

Special Issue Information

Dear Colleagues,

The Guest Editor is inviting submissions for a Special Issue of Applied Sciences on the subject area of "Renewable Energy 2018". Renewable energy is being introduced globally. Renewable energy is a promising and/or alternative energy resource in the world. This kind of energy reduces greenhouse gas compared with fossil resources. The introduction of renewable energy is environmental friendly and comprehensive in our society. However, highly-efficient and economic usage of renewable energy is a challenging task. We need to know the wide variety of knowledge for control, power electronics, power systems, etc. This Special Issue deals with recent state-of-the-art technology for renewable energy. These technologies increase the introduction of renewable energy in the world.

This Special Issue will focus on renewable energy and its applications. Topics of interest for publication include, but are not limited to: 

• Wind energy; 
• Solar energy; 
• Tidal energy; 
• Wave energy; 
• Biomass energy; 
• Energy storage; 
• Energy transportation; 
• Electrical power transmission; 
• Energy distribution; 
• Energy conversions; 
• Control technique for renewable energy; 
• Optimization technique for renewable energy; 
• Reduction of CO2 emission;
• Economic issues in renewable energy; 
• Hydrogen production from renewable energy.

Prof. Dr. Tomonobu Senjyu
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 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. Applied Sciences 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 1200 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.

Published Papers (2 papers)

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Research

Open AccessArticle Utilizing Downdraft Fixed Bed Reactor for Thermal Upgrading of Sewage Sludge as Fuel by Torrefaction
Appl. Sci. 2017, 7(11), 1189; doi:10.3390/app7111189
Received: 31 October 2017 / Revised: 13 November 2017 / Accepted: 15 November 2017 / Published: 18 November 2017
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Abstract
A lab-scale downdraft fixed bed reactor was used for the study of sewage sludge, a non-lignocellulosic biomass, torrefaction to enhance the thermochemical properties of sewage sludge. The torrefaction was carried out for a temperature range of 200–350 °C and a residence time of
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A lab-scale downdraft fixed bed reactor was used for the study of sewage sludge, a non-lignocellulosic biomass, torrefaction to enhance the thermochemical properties of sewage sludge. The torrefaction was carried out for a temperature range of 200–350 °C and a residence time of 0–50 min. Degree of torrefaction, torrefaction index, chemical exergy, gas analysis, and molar ratios were taken into account to analyze the torrefied product with respect to torrefaction temperature. The effect of torrefaction temperature was very pronounced and the temperature range of 250–300 °C was considered to be the optimum torrefaction temperature range for sewage sludge. Chemical exergy, calorific value and torrefaction index were significantly influenced by the change in the relative carbon content resulting in decrease of the O/C and H/C molar ratios. Full article
(This article belongs to the Special Issue Renewable Energy 2018)
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Open AccessArticle Spectral Correction of CPV Modules Equipped with GaInP/GaInAs/Ge Solar Cells and Fresnel Lenses
Appl. Sci. 2017, 7(8), 842; doi:10.3390/app7080842
Received: 24 July 2017 / Revised: 10 August 2017 / Accepted: 11 August 2017 / Published: 16 August 2017
Cited by 2 | PDF Full-text (804 KB) | HTML Full-text | XML Full-text
Abstract
Photovoltaic (PV) devices are spectrally selective, and their performance is influenced by unavoidable spectral variations. In addition, multijunction-based concentrating photovoltaic (CPV) devices show a strong spectral dependence due to the series connection of various junctions with different absorption bands, and also due to
[...] Read more.
Photovoltaic (PV) devices are spectrally selective, and their performance is influenced by unavoidable spectral variations. In addition, multijunction-based concentrating photovoltaic (CPV) devices show a strong spectral dependence due to the series connection of various junctions with different absorption bands, and also due to the use of concentrator optics. In this work, the accuracy of a new set of analytical equations that quantify the spectral impact caused by the changes in air mass (AM), aerosol optical depth (AOD) and precipitable water (PW) is discussed. Four different CPV devices based on lattice-matched and metamorphic triple-junction solar cells and a poly(methyl methacrylate) (PMMA) and silicon-on-glass (SoG) Fresnel lenses are considered. A long-term outdoor experimental campaign was carried out at the Centre for Advanced Studies on Energy and Environment (CEAEMA) of the University of Jaén, Spain. Results show a high accuracy in the estimations of the spectral factor (SF), with an average mean absolute percentage error (MAPE) within 0.91% and a mean relative error (MRE) within −0.32%. Full article
(This article belongs to the Special Issue Renewable Energy 2018)
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