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Energy Efficiency: Perspectives and Policies and the Critical aspects for Energy Conservation and Storage Towards Sustainable Development

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

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 5403

Special Issue Editors


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Guest Editor
1. Department of Physics, College of Science, King Faisal University, PO Box 400, Al Ahsa 31982, Saudi Arabia
2. Laboratory of Fluid Mechanics, Physics Department, Faculty of Science of Tunis, University of Tunis EI Manar, 2092 Tunis, Tunisia
Interests: modeling and simulation; finite volume method; computational fluid dynamics; convection; CFD simulation; heat exchangers; aerodynamics; thermal engineering; engineering simulation; fluid flow; heat transferexchangers; heat transfer

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Guest Editor
1. Institute of Ground Water Studies, Faculty of Natural and Agricultural Sciences, University of the Free State, Bloemfontein, South Africa
2. Department of Basic Sciences and Related Studies, Mehran University of Engineering and Technology, Jamshoro, Pakistan
Interests: fractional techniques for heat and mass transfer in energy efficiencies; nanofluids as the base fluids with nanoparticles for the sake of enhancement of thermal conductivities via different types nanoparticles
Special Issues, Collections and Topics in MDPI journals
Department of Pure and Applied Mathematics, School of Mathematical Sciences, Sunway University, No. 5, Jalan Universiti, Bandar Sunway, Petaling Jaya 47500, Malaysia
Interests: fluid dynamics; computational fluid dynamics; heat and mass transfer
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department of Mathematics, Capital University of Science and Technology (CUST), Islamabad 44000, Pakistan
Interests: fluid mechanics; non-newtonian fluids; heat and mass transfer; solar collectors; solar aircraft
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This is a call for papers for the Special Issue entitled Energy Efficiency: Perspectives and Policies and the Critical aspects for Energy Conservation and Storage Towards Sustainable Development.

Energy efficiency is the opposite of wasting energy; it simply means using less energy to perform an action. Actually, energy efficiency has become a buzzword for environmentalists, politicians, advertisers, and energy companies alike, and with good reason; it is seen as one of the most cost-effective ways to reduce carbon emissions. The amount of energy we use or waste has a direct impact on the environment, and on our wallets.

To tackle this issue, researches have been focused on the storage of thermal energy phenomena. In fact, Thermal Energy Storage (TES) deals with the storing of energy by cooling, heating, melting, solidifying, or vaporizing a material, the energy becoming available as heat when the process is reversed. In fact, the production of heat nowadays is mainly based on finite energy sources. Heat transfer performance and energy efficiency evaluations are of great significance for the efficient use of heat exchangers. The proper design, operation, and maintenance of heat exchangers will make the process energy efficient and minimize energy losses. In general, all attempts to achieve processes and thermodynamic cycles with high efficiency, low emissions, and low costs include heat transfer and heat exchangers to a large extent. The attempt to provide efficient, compact, and cheap heat transfer methods and heat exchangers is a real challenge for research.

Therefore, the objective of this Special Issue is to present recent original advances (theoretical and empirical research articles) as well as up-to-date progress in all areas of energy efficiency, energy conversion and storage, heat transfer in engineering, and its influence on emerging technologies.

The broad topics of interest include, but are not limited to, the following:

Dr. Basma Souayeh
Prof. Dr. Kashif Ali Abro
Dr. Ramesh Katta
Dr. Wasim Jamshed
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

  • energy technologies and innovation
  • sustainable development
  • energy efficiency
  • heat transfer
  • thermal system
  • energy conversion
  • waste heat recovery
  • cooling
  • heat transfer applications

Published Papers (3 papers)

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Research

22 pages, 10201 KiB  
Article
Numerical Analysis of an Aerofoil Fin Integrated Double Pass Solar Air Heater for Thermal Performance Enhancement
by Madhwesh Nagaraj, Manu Krishna Reddy, Arun Kumar Honnesara Sheshadri and Kota Vasudeva Karanth
Sustainability 2023, 15(1), 591; https://doi.org/10.3390/su15010591 - 29 Dec 2022
Cited by 4 | Viewed by 1604
Abstract
The Solar Air Heater (SAH) is considered to be one of the promising devices for the utilization of solar radiation. Extracting more heat to the flowing air is the focus of researchers, and many novel ideas are adopted to improve the efficiency of [...] Read more.
The Solar Air Heater (SAH) is considered to be one of the promising devices for the utilization of solar radiation. Extracting more heat to the flowing air is the focus of researchers, and many novel ideas are adopted to improve the efficiency of such collectors. The objective of the present work is the enhancement of thermal performance using a numerical analysis of a single flow double pass solar air heater with two types of arrangements of aerofoil fin configurations. The effect of the aerofoil fin configurations and the height of the fin are investigated for their thermal and thermohydraulic efficiencies. The height of the fin varied parametrically for the Reynolds number ranging from 3000 to 24,000 by keeping the axial pitch of the fin as a constant. It is found that the thermal efficiency increases with the increase in fin height due to an increased flow turbulence causing more absorption of heat to the working fluid. However, it is seen that the varying height of the fin beyond a certain height has yielded an adverse effect in terms of lesser thermal efficiency due to the expected flow blockage in the main stream. The thermohydraulic efficiency increases as the height of the fin decreases. The Computational Fluid Dynamics (CFD) results revealed that the optimum aerofoil fin configuration yields approximately a 23.24% higher thermal efficiency when compared with that of the single pass solar air heater (base model). The thermohydraulic efficiency exceeds the optimum aerofoil fin configuration compared with the base model by approximately 20.94%. Full article
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14 pages, 964 KiB  
Article
The Dynamics of Water-Based Nanofluid Subject to the Nanoparticle’s Radius with a Significant Magnetic Field: The Case of Rotating Micropolar Fluid
by Bagh Ali, N. Ameer Ahammad, Aziz Ullah Awan, Abayomi S. Oke, ElSayed M. Tag-ElDin, Farooq Ahmed Shah and Sonia Majeed
Sustainability 2022, 14(17), 10474; https://doi.org/10.3390/su141710474 - 23 Aug 2022
Cited by 13 | Viewed by 1228
Abstract
This article investigates the significance of varying radius of copper nanoparticles for non-Newtonian nanofluid flow due to an extending sheet in the presence of a magnetic field and porous medium. The modern technological applications of non-Newtonian nanofluids have attracted researchers in the current [...] Read more.
This article investigates the significance of varying radius of copper nanoparticles for non-Newtonian nanofluid flow due to an extending sheet in the presence of a magnetic field and porous medium. The modern technological applications of non-Newtonian nanofluids have attracted researchers in the current era. So, the impacts of the radius of nanoparticles with micropolar fluid have been taken into consideration. Three-dimensional leading equations (PDEs) for momentum, concentration, and temperature are transformed into ODEs by applying the appropriate similarity transformation. The numerical approach bvp4c is applied to obtain the problem’s solution numerically. The influence of the nanoparticles’ radius and various physical parameters on the microrotation, velocity, and temperature profile are analyzed. The velocity profile decreases against the magnetic field (M), rotational parameter (Γ), and Forchheimer number (Fr), but the temperature distribution has increasing behavior for these parameters, and the microrotation is augmented for rising inputs of the magnetic parameter and boundary parameter (β). It is also observed that the temperature reduces against the material parameter (∇) and Forchheimer number (Fr). The skin friction coefficients and Nusselt number decrease against the growing strength of the Forchheimer number (Fr). At the stretching surface, the skin friction factor and Nusselt number are numerically and graphically calculated. Full article
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22 pages, 7648 KiB  
Article
Significance of Thermal Phenomena and Mechanisms of Heat Transfer through the Dynamics of Second-Grade Micropolar Nanofluids
by Aziz Ullah Awan, N. Ameer Ahammad, Bagh Ali, ElSayed M. Tag-ElDin, Kamel Guedri and Fehmi Gamaoun
Sustainability 2022, 14(15), 9361; https://doi.org/10.3390/su14159361 - 30 Jul 2022
Cited by 3 | Viewed by 1087
Abstract
Due to their unique microstructures, micropolar fluids have attracted enormous attention due to their potential for industrial application, including convective heat and mass transfer polymer production and the rigid and random cooling of particles for metallic sheets. In this context, a micropolar second-grade [...] Read more.
Due to their unique microstructures, micropolar fluids have attracted enormous attention due to their potential for industrial application, including convective heat and mass transfer polymer production and the rigid and random cooling of particles for metallic sheets. In this context, a micropolar second-grade fluid flow over a vertical Riga plate is investigated for hidden microstructures. The novelty of the flow model allows us to explore the significance of Brownian motion and thermophoresis on the dynamics of non-Newtonian fluid. A mathematical model is developed under the flow assumptions for micropolar second-grade fluid over a vertical Riga plate of PDEs, reducing them into ODEs by invoking similarity techniques. The acquired system of non-linear ODEs is elucidated numerically using bvp4c methodology. Furthermore, comparative tables are generated to confirm the bvp4c technique, ensuring the accuracy of our numerical approach. This rheological study of micropolar second-grade fluid suggests that temperature distribution increases due to variations in the micropolar parameter (K), Eckert number (Ec), and the thermophoresis parameter (Nt), and the concentration distribution (Φ(η)) keeps rising against the boosting values of Brownian motion (Nb); however, the inverse trend is noted against thermophoresis (Nt). Full article
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