Energy and Green Technology

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Energy Systems".

Deadline for manuscript submissions: closed (20 November 2022) | Viewed by 12140

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School of Engineering, Division of Chemical Engineering, University of Wolverhampton, Wolverhampton WV1 1LY, UK
Interests: process modeling and simulation; chemometric and AI; energy conversion and storage
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School of Engineering, Computing and Mathematical Sciences, Division of Chemical Engineering, University of Wolverhampton, Wolverhampton WV1 1LY, UK
Interests: sustainable food production; energy storage; solar energy; materials for harvesting and storage
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Machine and Vehicle Design (MVD), Materials and Mechanical Engineering, Faculty of Technology, University of Oulu, P.O. Box 4200, FI-90014 Oulu, Finland
Interests: advanced/low-carbon automotive powertrain development; hybrid/electric vehicles powertrain system design; battery thermal management system; low temperature combustion; exhaust waste heat recover

Special Issue Information

Dear Colleagues,

Energy and green technology advancement has been one of the most important fields of study in recent years due to high energy demand, an increase in population and environmental issues related to using fossil fuels. As such, there is a need for an integrated system for product manufacturing to achieve a green, resource-efficient and low-carbon economy. Green hydrogen production; carbon capture and utilisation; gasification and pyrolysis of biomass and different feedstocks; and renewable and sustainable energies such as solar, geothermal, and wind are subjects that have attracted much attention from scholars. The application of MOFs as storage media and batteries to save produced energy is another area of study.

This Special Issue on “Energy and Green Technologies” seeks high-quality works focusing on the latest relevant studies. Topics include, but are not limited to:

  • Carbon capture, utilisation and storage (CCUS);
  • Green technology to produce renewable fuels such as methanol and hydrogen;
  • Energy conversion and storage technologies such as SOFC and batteries;
  • Zero-emissions technologies.

Dr. Tohid N. Borhani
Dr. Fideline Tchuenbou-Magaia
Dr. Amin Mahmoudzadeh Andwari
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. Processes 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 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

  • battery
  • decarbonisation
  • CCUS
  • energy conversion and storage
  • green hydrogen

Published Papers (4 papers)

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Research

23 pages, 5799 KiB  
Article
Effect of Baffles in Flow Channel on the Performance of Vanadium Redox Flow Battery
by Horng-Wen Wu and Yi-Kai Zeng
Processes 2023, 11(2), 523; https://doi.org/10.3390/pr11020523 - 08 Feb 2023
Cited by 1 | Viewed by 1461
Abstract
For a PEMFC to work better, adding baffles to a flow channel can improve reactant transfer. As a result, the work starts by developing a 3-D numerical model for the vanadium redox flow battery (VRFB) using COMSOL Multiphysic Simulation Software. By incorporating baffles [...] Read more.
For a PEMFC to work better, adding baffles to a flow channel can improve reactant transfer. As a result, the work starts by developing a 3-D numerical model for the vanadium redox flow battery (VRFB) using COMSOL Multiphysic Simulation Software. By incorporating baffles into the serpentine flow channel, it is possible to simulate changes in ion concentration and terminal voltage. The findings indicate that the battery efficiency will be impacted by adding baffles. The authors also studied the effect of baffle height and baffle count. The baffle height of 0.9 times the channel height and baffle number of 9 has a better performance on the battery. There are four cases for installing nine baffles and four arranging types in the entire serpentine flow using such baffle height and number. In Case 4, baffles are placed uniformly at the location of channel numbers 1, 9, and 17 in the serpentine flow path. It has a better voltage and ion concentration reaction than the other cases. The unit tests for cell performances were experimentally analyzed for a smooth-serpentine channel and a baffled-serpentine one. According to the experimental findings, a higher volume rate (300 mL/min) and lower current per area (40 mA/cm2) acquire the best energy efficiency. Case 4 has a higher energy efficiency than the smooth channel. Full article
(This article belongs to the Special Issue Energy and Green Technology)
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15 pages, 5884 KiB  
Article
Numerical Study on Hydrogen–Gasoline Dual-Fuel Spark Ignition Engine
by Mahdi Aghahasani, Ayat Gharehghani, Amin Mahmoudzadeh Andwari, Maciej Mikulski, Apostolos Pesyridis, Thanos Megaritis and Juho Könnö
Processes 2022, 10(11), 2249; https://doi.org/10.3390/pr10112249 - 01 Nov 2022
Cited by 6 | Viewed by 1343
Abstract
Hydrogen, as a suitable and clean energy carrier, has been long considered a primary fuel or in combination with other conventional fuels such as gasoline and diesel. Since the density of hydrogen is very low, in port fuel-injection configuration, the engine’s volumetric efficiency [...] Read more.
Hydrogen, as a suitable and clean energy carrier, has been long considered a primary fuel or in combination with other conventional fuels such as gasoline and diesel. Since the density of hydrogen is very low, in port fuel-injection configuration, the engine’s volumetric efficiency reduces due to the replacement of hydrogen by intake air. Therefore, hydrogen direct in-cylinder injection (injection after the intake valve closes) can be a suitable solution for hydrogen utilization in spark ignition (SI) engines. In this study, the effects of hydrogen direct injection with different hydrogen energy shares (HES) on the performance and emissions characteristics of a gasoline port-injection SI engine are investigated based on reactive computational fluid dynamics. Three different injection timings of hydrogen together with five different HES are applied at low and full load on a hydrogen–gasoline dual-fuel SI engine. The results show that retarded hydrogen injection timing increases the concentration of hydrogen near the spark plug, resulting in areas with higher average temperatures, which led to NOX emission deterioration at −120 Crank angle degree After Top Dead Center (CAD aTDC) start of injection (SOI) compared to the other modes. At −120 CAD aTDC SOI for 50% HES, the amount of NOX was 26% higher than −140 CAD aTDC SOI. In the meanwhile, an advanced hydrogen injection timing formed a homogeneous mixture of hydrogen, which decreased the HC and soot concentration, so that −140 CAD aTDC SOI implied the lowest amount of HC and soot. Moreover, with the increase in the amount of HES, the concentrations of CO, CO2 and soot were reduced. Having the HES by 50% at −140 CAD aTDC SOI, the concentrations of particulate matter (PM), CO and CO2 were reduced by 96.3%, 90% and 46%, respectively. However, due to more complete combustion and an elevated combustion average temperature, the amount of NOX emission increased drastically. Full article
(This article belongs to the Special Issue Energy and Green Technology)
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21 pages, 16056 KiB  
Article
Study on Dynamic Failure Characteristics of Coal and Rock in Stope Induced by Dynamic Load of Steep Horizontal Sublevel Mining
by Yongzhong Wang, Chongliang Yuan, Xianyuan Shi, Qingliang Chang and Biao Zhang
Processes 2022, 10(9), 1684; https://doi.org/10.3390/pr10091684 - 25 Aug 2022
Cited by 1 | Viewed by 1043
Abstract
In this paper, through a similar simulation experiment, the roof rock breaking situation of horizontal sublevel caving method in extremely thick and steep inclined coal seam is studied, and the response characteristics of coal and rock mass under different dynamic load strength are [...] Read more.
In this paper, through a similar simulation experiment, the roof rock breaking situation of horizontal sublevel caving method in extremely thick and steep inclined coal seam is studied, and the response characteristics of coal and rock mass under different dynamic load strength are analyzed. The mechanical response mechanisms of different mining positions under the influence of dynamic load and the law characteristics of the surrounding rock from elastic deformation to impact failure are revealed. The study shows that with the increase in the horizontal sublevel mining depth, the roof is gradually broken from the suspended state, and the broken block fills the goaf. The thin rock strata form a granular structure, and the thick rock strata form a block splicing and occlusion structure. On the same side of the coal seam floor, the concentrated stress gradually increases, and the closer the distance from the goaf is, the more obvious the stress change in the coal body below is. With the increase in dynamic load energy, the dynamic instability and failure of the dynamic load side of the roadway occur, and the stress of the bottom coal in the intake roadway of the working face increases due to the influence of the lateral abutment pressure of the goaf, while the stress of the bottom coal in the middle of the working face and the return airway decreases due to the mining of the upper section, which reveals that the dynamic load-induced dynamic behavior requires the critical energy. Due to vibration waves, the dynamic load effect is short, and the reflective stretching is generated on the surface of the roadway, resulting in the failure of the roadway. The peak acceleration increases linearly with the increase in source energy, indicating that the stronger the dynamic load energy is, the higher the impact risk is. When the dynamic load intensity is constant, the peak acceleration decreases with the increase in propagation distance, indicating that the vibration wave has the dominant propagation direction, and there are certain directional differences in the effect of coal and rock. When the dynamic load is applied, the impact failure of the coal body has a critical displacement. When the displacement of the roadway surface is less than this critical displacement, the impact failure will not occur. Full article
(This article belongs to the Special Issue Energy and Green Technology)
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16 pages, 3081 KiB  
Article
Analysis of Solar Energy Development Strategies for a Successful Energy Transition in the UAE
by Mohsen Salimi, Morteza Hosseinpour and Tohid N.Borhani
Processes 2022, 10(7), 1338; https://doi.org/10.3390/pr10071338 - 08 Jul 2022
Cited by 20 | Viewed by 7671
Abstract
The United Arab Emirates (UAE) is making significant progress in improving its economy by attracting tourists and trade. In the short run, however, economic activity will continue to be more based on oil, natural gas, and related industries. Rising demand for natural gas [...] Read more.
The United Arab Emirates (UAE) is making significant progress in improving its economy by attracting tourists and trade. In the short run, however, economic activity will continue to be more based on oil, natural gas, and related industries. Rising demand for natural gas for power plants and industrial users, such as petrochemicals and steelmakers, has made the UAE a net gas importer, prompting the country to launch multibillion-dollar investments in nuclear and renewable energy. This study addresses the trend of solar energy production and consumption in the UAE. The strengths, weaknesses, opportunities, and threats (SWOT) analysis was performed on the different types of solar energy in the UAE, and some strategies were developed based on it. The SWOT analysis reveals promising strategies for the UAE’s solar energy transition that would reduce fossil fuel demand, mitigate greenhouse gas emissions through solar energy production, and transform the UAE into the carbon market centre of the Gulf Cooperation Council countries. Full article
(This article belongs to the Special Issue Energy and Green Technology)
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