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Research on Energy, Environment, and Sustainable Development
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Research on Energy, Environment, and Sustainable Development

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A: Sustainable Energy".

Deadline for manuscript submissions: 19 June 2024 | Viewed by 4688

Special Issue Editors

Dr. Xiaobin Gu

E-Mail Website
Guest Editor
Guangzhou Institute of Energy Conversion of the Chinese Academy of Sciences, Guangzhou 510640, China
Interests: energy storage materials; thermal energy storage; interfacial solar vapor generatioin; mineral materials; clay minerals
Prof. Dr. Kaijun Dong

E-Mail Website
Guest Editor
Guangzhou Institute of Energy Conversion of the Chinese Academy of Sciences, Guangzhou 510640, China
Interests: energy saving of building and industry; data center; energy storage technology; system optimization

Special Issue Information

Dear Colleagues,

The journal Energies is pleased to invite you to submit research and/or review papers to a Special Issue on “Research on Energy, Environment, and Sustainable Development”. This special issue aims to tackle the key global and societal challenges of ensuring the provision of energy and protecting our environment for the future. Specifically, the Special Issue is expected to present new research findings as well as reviews of significant work in the field of energy storage and solid waste recycling. Potential topics include but are not limited to:

  • solar energy;
  • solar thermal;
  • phase change materials;
  • thermal energy storage;
  • electrochemical energy storage;
  • energy saving technology;
  • solid waste recycling;
  • soil remediation;
  • microbial remediation;
  • environmental remediation;
  • sustainability.

We look forward to your contribution in this Special Issue.

Dr. Xiaobin Gu
Prof. Dr. Kaijun Dong
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. Energies 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 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

  • solar energy
  • solar thermal
  • phase change materials
  • thermal energy storage
  • electrochemical energy storage
  • energy saving technology
  • solid waste recycling
  • soil remediation
  • microbial remediation
  • environmental remediation
  • sustainability

Published Papers (4 papers)

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Research

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13 pages, 4183 KiB  
Article
Experimental Study on a Novel Form-Stable Phase Change Material Based on Solid Waste Iron Tailings as Supporting Material for Thermal Energy Storage
by Peng Liu, Yajing Wang, Zhao Liang, Zhikai Zhang, Jun Rao and Shuai Jiang
Energies 2023, 16(20), 7037; https://doi.org/10.3390/en16207037 - 11 Oct 2023
Cited by 1 | Viewed by 890
Abstract
To prevent liquid leakage during the phase transition of a phase change material (PCM), a novel form-stable PCM (FSPCM) based on LA/CIT/CNT was fabricated using a simple and facile direct impregnation method. The iron tailings (ITs) was calcinated at first. And then lauric [...] Read more.
To prevent liquid leakage during the phase transition of a phase change material (PCM), a novel form-stable PCM (FSPCM) based on LA/CIT/CNT was fabricated using a simple and facile direct impregnation method. The iron tailings (ITs) was calcinated at first. And then lauric acid (LA) was impregnated into the calcinated iron tailings (CITs) with carbon nanotubes (CNTs) as a thermal conductivity additive. Subsequently, the leakage tests and the properties of the prepared samples were investigated by diffusion-oozing testing (DOT), SEM, XRD, FTIR, DSC, TGA, and intelligent paperless recorder (IPR). DOT results showed that the impregnation ratio of LA into the CIT and CNT was up to 27.5% without leakage. SEM indicated that LA can be adsorbed into microscale pores and covered the surface of CITs and CNTs. FTIR spectra indicated that there was no chemical reaction during the preparation process. The melting and freezing temperatures of the prepared LA/CIT/CNT FSPCMs were measured as 45.24 °C and 39.61 °C, respectively. Correspondingly, the latent heat values were determined as 39.95 J/g and 35.63 J/g, respectively. The LA/CIT/CNT FSPCMs exhibited good thermal stability in the working temperature range, and its heat transfer efficiency was improved significantly by 69.23% for LA and 84.62% for LA/CIT FSPCM. In short, LA/CIT/CNT FSPCMs are a very promising material for thermal energy storage in practical low-temperature applications. Full article
(This article belongs to the Special Issue Research on Energy, Environment, and Sustainable Development)
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16 pages, 4355 KiB  
Article
Preparation and Characterization of Lauric Acid/Modified Fly Ash/Graphene Composite as Low-Cost and Eco-Friendly Phase Change Materials for Thermal Energy Storage
by Peng Liu, Xinglan Cui, Yajing Wang, Zhikai Zhang, Jun Rao, Shuai Jiang and Xiaobin Gu
Energies 2023, 16(15), 5666; https://doi.org/10.3390/en16155666 - 28 Jul 2023
Viewed by 1052
Abstract
Fly ash is a kind of industrial solid waste that is considered “hazardous waste”. In this study, a supporting matrix of modified fly ash (MFA) was employed to package lauric acid (LA) via a facile direct impregnation method involving less experimental error. A [...] Read more.
Fly ash is a kind of industrial solid waste that is considered “hazardous waste”. In this study, a supporting matrix of modified fly ash (MFA) was employed to package lauric acid (LA) via a facile direct impregnation method involving less experimental error. A low-cost and eco-friendly form-stable phase change material (PCM) of LA/MFA/graphene (G) was fabricated, with G as the thermal conductivity enhancer. The preparation and leakage testing of an LA/MFA/G form-stable PCM (FSPCM) were investigated in detail. The leakage test results indicated that good package efficiency was obtained using MFA with a higher specific surface area and richer pore structure to pack the LA. Then, LA/MFA/G composites were characterized via scanning electronic microscope (SEM), Fourier transform infrared spectroscope (FTIR), differential scanning calorimeter (DSC), and thermal gravimetric analyzer (TGA). The results showed that excellent form stability was obtained by adding MFA as the supporting matrix. The SEM analysis indicated that LA could be well dispersed into the structure of MFA. The FTIR analysis demonstrated that the components of the FSPCM were quite compatible. The results of the DSC illustrated that LA/MFA/G (5 wt. %) had a melting point of 45.38 °C and a latent heat of 41.08 J/g. The TGA analysis revealed that the prepared FSPCM had better thermal stability compared with LA within its working temperature range. In addition, the effects of G on the heat transfer performance of the prepared FSPCM were examined. In short, using MFA with a higher specific surface area and richer pore structure to pack the LA via a simple preparation process with less experimental error can contribute to good performance. The research not only improved the comprehensive utilization of solid waste, but also promotes the application of FSPCM in the field of building energy conservation. Full article
(This article belongs to the Special Issue Research on Energy, Environment, and Sustainable Development)
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14 pages, 3066 KiB  
Article
Anti-Condensation Temperature Control Strategy of the Concrete Radiant Roof
by Bobo Zhang, Qin Sun, Lin Su, Kaijun Dong, Weimin Luo, Haifeng Guan, Zhenhua Shao and Wei Wu
Energies 2023, 16(12), 4826; https://doi.org/10.3390/en16124826 - 20 Jun 2023
Viewed by 889
Abstract
Radiation cooling, as a new terminal mode that has been gradually emerging in recent years, has attracted more and more attention. However, the problem of condensation has become a vital bottleneck restricting the broad application of radiation-cooling technology. This paper used the numerical [...] Read more.
Radiation cooling, as a new terminal mode that has been gradually emerging in recent years, has attracted more and more attention. However, the problem of condensation has become a vital bottleneck restricting the broad application of radiation-cooling technology. This paper used the numerical simulation method of Ansys Fluent to study the effect of different water supply parameters on the concrete radiant roof’s heat transfer performance, temperature uniformity analysis, and anti-condensation temperature control strategy. The accuracy of the simulation model was verified by comparing the numerical simulation values and measured values of temperature monitoring points. In thermal performance research, the inlet temperature significantly impacted the cooling capacity and radiant surface temperature compared with the inlet flow velocity. In the uniformity study, the distance between the serpentine pipes area and the concrete edge was easily neglected, which was also an important factor affecting the distribution of temperature uniformity. Regarding anti-condensation and performance improvement research, first supplying water at low temperatures and then dynamically adjusting high-temperature water could effectively avoid condensation and improve the radiant roof’s heat transfer performance. The research results could provide technical references for the practical application of radiation roof anti-condensation temperature control technology. Full article
(This article belongs to the Special Issue Research on Energy, Environment, and Sustainable Development)
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Review

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40 pages, 8730 KiB  
Review
Advancements in Fresnel Lens Technology across Diverse Solar Energy Applications: A Comprehensive Review
by Farhan Lafta Rashid, Mudhar A. Al-Obaidi, Ali Jafer Mahdi and Arman Ameen
Energies 2024, 17(3), 569; https://doi.org/10.3390/en17030569 - 24 Jan 2024
Cited by 1 | Viewed by 1466
Abstract
Concentration of solar energy may be obtained by reflection, refraction, or a combination of the two. The collectors of a reflection system are designed to concentrate the sun’s rays onto a photovoltaic cell or steam tube. Refractive lenses concentrate light by having it [...] Read more.
Concentration of solar energy may be obtained by reflection, refraction, or a combination of the two. The collectors of a reflection system are designed to concentrate the sun’s rays onto a photovoltaic cell or steam tube. Refractive lenses concentrate light by having it travel through the lens. The sun’s rays are partially reflected and then refracted via a hybrid technique. Hybrid focus techniques have the potential to maximize power output. Fresnel lenses are an efficient tool for concentrating solar energy, which may then be used in a variety of applications. Development of both imaging and non-imaging devices is occurring at this time. Larger acceptance angles, better concentration ratios with less volume and shorter focal length, greater optical efficiency, etc., are only some of the advantages of non-imaging systems over imaging ones. This study encompasses numerical, experimental, and numerical and experimental studies on the use of Fresnel lenses in various solar energy systems to present a comprehensive picture of current scientific achievements in this field. The framework, design criteria, progress, and difficulties are all dissected in detail. Accordingly, some recommendations for further studies are suggested. Full article
(This article belongs to the Special Issue Research on Energy, Environment, and Sustainable Development)
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