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Sustainability
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Renewable Energy Technologies and Energy Efficient Utilization
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Renewable Energy Technologies and Energy Efficient Utilization

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

Deadline for manuscript submissions: closed (15 October 2023) | Viewed by 3656

Special Issue Editors

Prof. Dr. Ibrahim I. El-Sharkawy

E-Mail Website
Guest Editor
Department of Sustainable and Renewable Energy Engineering, College of Engineering, University of Sharjah, Sharjah 27272, United Arab Emirates
Interests: atmospheric water harvesting; solar cooling; solar thermal applications; energy-efficient systems
Special Issues, Collections and Topics in MDPI journals
Dr. Ali Mohammed Radwan

E-Mail Website
Guest Editor
Sustainable and Renewable Energy Engineering Department, College of Engineering, University of Sharjah, Sharjah 27272, United Arab Emirates
Interests: thermal management devices for high-heat-flux surfaces including concentrator photovoltaic (CPV); photovoltaic; electronic chips; thermal energy storage using phase change materials (PCMs); thermochemical energy storage; enhancing energy efficiency in buildings using vacuum insulation panels; radiant cooling technology; thermal peak load shifting using PCMs in building structures
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

It is our pleasure to invite you to submit an article to the current Special Issue in  Sustainability entitled “Renewable Energy Technologies and Energy-Efficient Utilization”. Energy demand, global warming, and ozone depletion are serious problems that call for immediate solutions. Shifting from conventional energy resources to renewables plays a vital role in reducing climate change and its impacts. Moreover, the utilization of efficient renewable energy-based systems is essential for sustainable development and energy saving. The present Special Issue has a wide scope and covers a wide range of renewable and energy-efficient technology-related topics. Researchers are welcome to submit their original experimental, computational, and review articles for this Special Issue.

The Special Issue covers the progressions in all renewable energy technologies and energy efficiency, including, but not limited to, the following topics:

  • Solar energy for a sustainable environment.
  • Solar cooling technologies.
  • Geothermal systems.
  • Biomass technologies.
  • Wind energy technology.
  • Multigeneration systems.
  • Energy-efficiency enhancement
  • Solar thermal applications for drying, heating, and power generation
  • Solar thermal energy technologies include: flat plate, evacuated tube, and vacuum-based and concentrator-based solar collectors.
  • Mono-facial and bifacial photovoltaic, PV/T, and concentrated photovoltaic technologies
  • Computational and theoretical modeling of renewable energy applications, including wind, solar, biomass, and geothermal energy.

Prof. Dr. Ibrahim I. El-Sharkawy
Dr. Ali Radwan
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. 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 2400 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

  • solar cooling
  • solar thermal applications
  • multigeneration systems
  • energy efficient utilization
  • sustainable environment
  • geothermal systems
  • biomass technologies
  • wind energy
  • photovoltaic technologies
  • solar collectors

Published Papers (3 papers)

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Research

18 pages, 5008 KiB  
Article
Solar-Powered Adsorption-Based Multi-Generation System Working under the Climate Conditions of GCC Countries: Theoretical Investigation
by Ibrahim I. El-Sharkawy, M. Hassan, Mahmoud M. Abd-Elhady, Ali Radwan and Abrar Inayat
Sustainability 2023, 15(22), 15851; https://doi.org/10.3390/su152215851 - 11 Nov 2023
Viewed by 705
Abstract
In this study, transient modelling for a solar-powered adsorption-based multi-generation system working under the climatic conditions of the Gulf Cooperation Council (GCC) countries is conducted. Three cities are selected for this study: Sharjah in the United Arab Emirates, Riyadh in Saudi Arabia, and [...] Read more.
In this study, transient modelling for a solar-powered adsorption-based multi-generation system working under the climatic conditions of the Gulf Cooperation Council (GCC) countries is conducted. Three cities are selected for this study: Sharjah in the United Arab Emirates, Riyadh in Saudi Arabia, and Kuwait City in Kuwait. The system comprises (i) evacuated tube solar collectors (ETCs), (ii) photovoltaic-thermal (PVT) solar collectors, and (iii) a single-stage double-bed silica gel/water-based adsorption chiller for cooling purposes. A MATLAB code is developed and implemented to theoretically investigate the performance of the proposed system. The main findings of this study indicate that among the selected cities, based on the proposed systems and the operating conditions, Riyadh has the highest cooling capacity of 10.4 kW, followed by Kuwait City, then Sharjah. As for the coefficient of performance (COP), Kuwait City demonstrates the highest value of 0.47. The electricity generated by the proposed system in Riyadh, Kuwait City, and Sharjah is 31.65, 31.3, and 30.24 kWh/day, respectively. Furthermore, the theoretical results show that at 18:00, the overall efficiency of the proposed system reaches about 0.64 because of the inclusion of a storage tank and its feeding for the adsorption chiller. This study analyzes the feasibility of using a combination of ETCs and PVT collectors to drive the adsorption chiller system and produce electricity in challenging weather conditions. Full article
(This article belongs to the Special Issue Renewable Energy Technologies and Energy Efficient Utilization)
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23 pages, 4161 KiB  
Article
Performances Analysis of Three Grid-Tied Large-Scale Solar PV Plants in Varied Climatic Conditions: A Case Study in Algeria
by Amor Fezzani, Mawloud Guermoui, Abdellah Kouzou, Ahmed Hafaifa, Layachi Zaghba, Said Drid, Jose Rodriguez and Mohamed Abdelrahem
Sustainability 2023, 15(19), 14282; https://doi.org/10.3390/su151914282 - 27 Sep 2023
Cited by 2 | Viewed by 974
Abstract
Currently, for the determination of the suitable and optimal PV power plant according to the climate conditions of the concerned region, researchers focus on the estimation of certain performance factors, which are reported to be the key parameters for the analysis of the [...] Read more.
Currently, for the determination of the suitable and optimal PV power plant according to the climate conditions of the concerned region, researchers focus on the estimation of certain performance factors, which are reported to be the key parameters for the analysis of the performances of grid-connected photovoltaic (PV) power systems. In this context, this paper focuses on on-site real-time analysis of the performance of three solar photovoltaic plants: Sidi-bel-Abbés (12 MWp), Laghouat (60 MWp), and Ghardaïa (1.1 MWp). These plants are located in different regions experiencing diverse climatic conditions in Algeria. The analysis was carried out by the standardized norms of IEC 61724, using monitoring data collected over one year. The photovoltaic power plants were evaluated in terms of performance factors, such as the reference yield (Yr), final yield (Yf), performance ratio (PR), and capacity factor (CF). On the other side, based on real data collected at the concerned sites, two linear functions depending on solar irradiance and the PV module temperature for each site are proposed for the evaluation of the generated alternative power output (PAC) for the three PV plants. The obtained results based on the study presented in this paper can help designers of PV power plants of different technologies and different climate conditions to precisely decide the convenient technology that allows the best production of the electrical energy for grid-tied PV systems. Furthermore, this study can contribute in giving a clear vision of the implementation of upcoming large-scale solar PV power plants in Algeria within the studied area and other areas. Full article
(This article belongs to the Special Issue Renewable Energy Technologies and Energy Efficient Utilization)
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25 pages, 11699 KiB  
Article
A Comparative Study of Optimal Individual Pitch Control Methods
by Abhinandan Routray, Nitin Sivakumar, Sung-ho Hur and Deok-je Bang
Sustainability 2023, 15(14), 10933; https://doi.org/10.3390/su151410933 - 12 Jul 2023
Cited by 3 | Viewed by 1467
Abstract
Wind turbines are subjected to asymmetric loads and fatigue with subsequent increases in their dimension and capacity, leading to a reduction in their lifetime. To address this problem, the individual pitch control (IPC) technique is quite familiar in the control of wind turbines. [...] Read more.
Wind turbines are subjected to asymmetric loads and fatigue with subsequent increases in their dimension and capacity, leading to a reduction in their lifetime. To address this problem, the individual pitch control (IPC) technique is quite familiar in the control of wind turbines. IPC is used to reduce the tilt and yaw moments, simultaneously alleviating the turbine blade-root bending moments (BRBMs). This study discusses the performance of model predictive control (MPC), H-infinity (H∞), and proportional and integral (PI)-based IPC strategies integrated with collective pitch control. The performance of the reported controllers has been validated using the National Renewable Energy Laboratory (NREL) 5 MW full nonlinear reference wind turbine. Simulation studies are conducted at varying wind speeds and turbulent intensities as per international electrotechnical commission (IEC) norms. Comparative results in the time and frequency domains indicate that the H∞ based IPC achieves enhanced control performance in terms of reduction in BRBMs and damage equivalent load compared to MPC and PI-based control strategies. Full article
(This article belongs to the Special Issue Renewable Energy Technologies and Energy Efficient Utilization)
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