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Thermal Management in Energy Systems

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

Deadline for manuscript submissions: closed (30 April 2022) | Viewed by 11914

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Special Issue Editor

Prof. Dr. Fatih Selimefendigil

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Guest Editor

Department of Mechanical Engineering, Manisa Celal Bayar University, Manisa 45140, Turkey
Interests: nanofluid technology applications; thermal energy storage; ferrofluid; MHD flow; thermoacoustics; aeroacoustics; thermoelectricity; heat transfer enhancement; fluid–structure interaction; solar energy applications; computational fluid mechanics
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Dear Colleagues,

Thermal management in energy systems provides performance enhancement and reliable operating conditions during the lifespan of energy-related products, for which many applications are possible in diverse systems, including photovoltaic panels, hydrogen storage, lithium-ion battery systems, thermal energy storage, and micro-electro-mechanical systems (MEMs) in addition to numerous convective heat transfer applications. Active, passive, and hybrid methods have been considered for thermal management in renewable and nonrenewable energy systems. In one of the available methods, nano-sized particles are used in heat transfer fluids, and this nanofluid technology has been successfully implemented for thermal management of diverse energy systems, including solar power, thermoelectric power generation, refrigeration, jet impingement heat transfer, and electronic cooling applications. In terms of geometry, surface modifications in the form of controlled corrugation waves and partitioning of various types, including deformable, rotating, or moving obstacles of various shapes, have also been considered together with nanofluids. Advanced simulation tools and experimental and numerical techniques have been developed to analyze the impacts of using magnetic fields and porous media with nanofluids for thermal management in devised thermofluid systems. Applications of thermal energy storage (TES) systems and phase change materials (PCMs) are also a good option for thermal management in systems such as related to the cell temperature of a PV panel and to increase its efficiency. In addition, nano-enhanced PCMs are used with metal foams and highly conductive fins to increase their effectiveness, which provides better thermal management options in energy systems via passive techniques.

The present Special Issue will focus on the application of various thermal management methods in diverse energy systems and present the most recent methods and advanced simulation tools. It represents a good opportunity for researchers to present their promising thermal management techniques as part of a collection. It is envisaged that this Special Issue will serve as an invaluable reference for researchers and engineers by detailing the recent advancements, applications, and future challenges in thermal management techniques.

Prof. Dr. Fatih Selimefendigil
Guest Editor

Manuscript Submission Information

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Keywords

thermal management
nanofluids
phase change materials
surface corrugation
deformable walls
rotating or stationary objects
porous inserts
metal foams
swirl flow devices
flow pulsations
magnetic field effects

Published Papers (6 papers)

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Research

16 pages, 7095 KiB

Open AccessArticle

An MHD Flow of Non-Newtonian Fluid Due to a Porous Stretching/Shrinking Sheet with Mass Transfer

by Ulavathi Shettar Mahabaleshwar, Thippeswamy Anusha, David Laroze, Nejla Mahjoub Said and Mohsen Sharifpur

Sustainability 2022, 14(12), 7020; https://0-doi-org.brum.beds.ac.uk/10.3390/su14127020 - 08 Jun 2022

Cited by 6 | Viewed by 1299

Abstract

An examination is carried out for three-dimensional incompressible viscoelastic fluid flow over a porous stretching/shrinking sheet with hybrid nanoparticles copper-alumina

(C u - A l_{2} O_{3})

in base fluid water

(H_{2} O)

. The uniform magnetic [...] Read more.

An examination is carried out for three-dimensional incompressible viscoelastic fluid flow over a porous stretching/shrinking sheet with hybrid nanoparticles copper-alumina

(C u - A l_{2} O_{3})

in base fluid water

(H_{2} O)

. The uniform magnetic field of strength

B_{0}

is applied perpendicular to the fluid flow and considered the Navier slip. The mass transfer is considered with the chemical reaction rate. The governing equation for the defined flow forms the system of partial differential equations, which are then transformed into a system of ordinary differential equations via similarity transformations. The goal is to find the exact analytical solution, and the unique solution is determined by considering the boundary layer theory. Furthermore, the obtained system is solved to get the exact analytical solution for velocity and concentration fields in exponential form and in hypergeometric form, respectively. The exact solutions are obtained for velocity and temperature profiles, Skin friction, and Nusselt number. These findings are beneficial for future research in the present area. The parameters magnetic field, Inverse Darcy number, slip parameter, chemical reaction parameter, stretching/shrinking parameter, and viscoelastic parameter, influence the flow. The effect of these parameters on fluid velocity and concentration field will be analyzed through graphs. Skin friction and Nusselt number are also analyzed. This work found many applications in machining and manufacturing, solar energy, MHD flow meters and pumps, power generators, geothermal recovery, flow via filtering devices, chemical catalytic reactors, etc. Full article

(This article belongs to the Special Issue Thermal Management in Energy Systems)

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15 pages, 21038 KiB

Open AccessArticle

Experimental Performance Analysis of a Solar Desalination System Modified with Natural Dolomite Powder Integrated Latent Heat Thermal Storage Unit

by Fatih Selimefendigil, Ceylin Şirin and Hakan F. Öztop

Sustainability 2022, 14(5), 2650; https://0-doi-org.brum.beds.ac.uk/10.3390/su14052650 - 24 Feb 2022

Cited by 19 | Viewed by 1840

Abstract

Solar desalination systems are effective and sustainable applications that are utilized to obtain potable water from saline or contaminated water. In this research, three solar desalination systems, including a conventional system, a phase change material (PCM)-based thermal energy storage unit (TESU), and a natural dolomite powder integrated PCM-based TESU, were structured and experimentally investigated. The developed solar desalination systems were analyzed simultaneously and the findings were discussed in detail. According to the empirically obtained outcomes, utilizing PCM-based TESUs and dolomite-powder-embedded PCM-based TESUs increased daily cumulative productivity by 10.15% and 17.70%, respectively, in comparison to the conventional distiller. Employing dolomite powder increased the energy and exergy efficiencies of the conventional distiller from 15.91% to 18.28% and from 1.26% to 1.78%, respectively. Moreover, environmental metrics such as global warming potential and the sustainability index of the developed solar desalination systems were analyzed within the scope of this work. Full article

(This article belongs to the Special Issue Thermal Management in Energy Systems)

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17 pages, 6524 KiB

Open AccessArticle

Using Phase Change Materials (PCMs) in a Hot and Humid Climate to Reduce Heat Gain and Energy Consumption

by Mohammad S. Bagazi, Ammar A. Melaibari, Ahmed B. Khoshaim, Nidal H. Abu-Hamdeh, Abdulmohsen O. Alsaiari and Hani Abulkhair

Sustainability 2021, 13(19), 10965; https://0-doi-org.brum.beds.ac.uk/10.3390/su131910965 - 02 Oct 2021

Cited by 3 | Viewed by 2117

Abstract

Twenty percent of the world’s energy is consumed by the construction sector, including commercial and residential buildings, where 13% is consumed by the residential sector only. Half of the total energy consumed by buildings in Saudi Arabia is specifically attributed to the hot summer season, which, unlike in many other countries in the Middle East, continues for more than 5 months annually. The use of a phase change material (PCM), as an insulator in building materials, can be a solution to provide a comfortable indoor temperature and reduce energy consumption. This study examined two different melting ranges for PCMs RT35 and RT35HC inserted into hollow clay bricks to investigate their thermal behavior and heat storage capacity and compare them with polystyrene foam. To perform this experiment, four chambers were constructed using cement plastering. The data were collected at Jeddah, Saudi Arabia, from mid-November 2020 to the end of February 2021. When the highest temperature was reached during the experiment, PCM RT35 provided a better cooling effect by 13% compared to 24% and 28.56% for PCM RT35HC and foam, respectively, compared to hollow bricks alone. However, when the lowest temperature was reached during the experiment, PCM RT35HC performed better than the other chambers in saving energy and keeping the chamber warm, which was 9.5% for the reference chamber, 7.0% for the foam chamber, and 2.8% for PCM RT35. The maximum energy saving of PCM RT35 was around 1920 kJ, which is around 0.533 kWh, for one wall only, and for PCM RT35HC, it was 2880 kJ, or 0.8 kWh, which can reduce energy consumption of the HVAC system by 97 kWh/m² and 146 kWh/m² per year, respectively. Full article

(This article belongs to the Special Issue Thermal Management in Energy Systems)

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11 pages, 3831 KiB

Open AccessArticle

Numerical Assessment of an Innovative Design of an Evacuated Tube Solar Collector Incorporated with PCM Embedded Metal Foam/Plate Fins

by Mohamed Houcine Dhaou, Sofiene Mellouli, Faisal Alresheedi and Yassine El-Ghoul

Sustainability 2021, 13(19), 10632; https://0-doi-org.brum.beds.ac.uk/10.3390/su131910632 - 24 Sep 2021

Cited by 7 | Viewed by 2007

Abstract

The objective of this manuscript is to study the possibility of improving the thermal performance of an Evacuated Tube Solar Collector (ETSC) with the integration of a Phase Change Material (PCM) incorporated into metallic foam and fitted with plate fins. A 2D mathematical model has been proposed. Two types of metal foams (copper and nickel) were inserted. In addition, the effect of metal foam pore size of on heat transfer was studied. The results were acquired through numerical simulations of four different cases; namely, Case 1: pure PCM, Case 2: with metal foam, Case 3: with fins and Case 4: with metal foam and fins. The evaluation procedure involved observing the total change in Heat Transfer Fluid (HTF) temperature and melted PCM fraction during a single day. The results proved that the thermal performance of ETSC is improved considerably by inserting metal foam and fins simultaneously. The time required for the whole process is improved by almost 9% compared to the case of pure PCM, and 2% compared to the case of inserting only plate fins. Results revealed that the pore size of the metal foams slightly affects the dynamic process of heat storage/release in the ETSC/PCM system. Full article

(This article belongs to the Special Issue Thermal Management in Energy Systems)

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19 pages, 4691 KiB

Open AccessArticle

The Effects of Hot Blocks Geometry and Particle Migration on Heat Transfer and Entropy Generation of a Novel I-Shaped Porous Enclosure

by Ramin Ghasemiasl, Maysam Molana, Taher Armaghani and Mohsen Saffari Pour

Sustainability 2021, 13(13), 7190; https://0-doi-org.brum.beds.ac.uk/10.3390/su13137190 - 26 Jun 2021

Cited by 7 | Viewed by 1331

Abstract

This paper studied the cooling performance of a hot electronic chip using nanofluids (NF) mixed convection, implementing Buongiorno’s model of the NF simulation. The NF were assumed water-Al₂O₃ nanoparticles (NP) in the range of 0 to 4% of volume concentration. Six different problems of the combinations of three internal hot blocks, including triangular, square, and circular geometries, and two porous media, including sand and compact metallic powder, were numerically solved. To discretize the governing equations, a finite control volume method was applied. As most of the proposed correlations for the thermophysical properties of the NF were inaccurate, especially for thermal conductivity, a new predictive correlation was proposed using the multi-variable regression method with acceptable accuracy. It was found that the cooling performance improved with any increase in the NP loading. A higher nanoparticle concentration yielded better cooling characteristics, which was 11.93% for 4% volume. The sand porous medium also yielded a much higher value of the normalized Nusselt number (Nu) compared to the other medium. The entropy generation (EG) enhancement was maximum for the triangular hot block in a sand porous cavity. Full article

(This article belongs to the Special Issue Thermal Management in Energy Systems)

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23 pages, 1421 KiB

Open AccessArticle

Jet Impingement Heat Transfer of Confined Single and Double Jets with Non-Newtonian Power Law Nanofluid under the Inclined Magnetic Field Effects for a Partly Curved Heated Wall

by Fatih Selimefendigil, Hakan F. Oztop and Ali J. Chamkha

Sustainability 2021, 13(9), 5086; https://0-doi-org.brum.beds.ac.uk/10.3390/su13095086 - 01 May 2021

Cited by 14 | Viewed by 2080

Abstract

Single and double impinging jets heat transfer of non-Newtonian power law nanofluid on a partly curved surface under the inclined magnetic field effects is analyzed with finite element method. The numerical work is performed for various values of Reynolds number (Re, between 100 [...] Read more.

γ

, between 0 and 90), curved wall aspect ratio (

A R

, between 01. and 1.2), power law index (n, between 0.8 and 1.2), nanoparticle volume fraction (

ϕ

, between 0 and 0.04) and particle size in nm (

d p

, between 20 and 80). The amount of rise in average Nusselt (Nu) number with Re number depends upon the power law index while the discrepancy between the Newtonian fluid case becomes higher with higher values of power law indices. As compared to case with n = 1, discrepancy in the average Nu number are obtained as

- 38 %

and 71.5% for cases with n = 0.8 and n = 1.2. The magnetic field strength and inclination can be used to control the size and number or vortices. As magnetic field is imposed at the higher strength, the average Nu reduces by about 26.6% and 7.5% for single and double jets with n greater than 1 while it increases by about 4.78% and 12.58% with n less than 1. The inclination of magnetic field also plays an important role on the amount of enhancement in the average Nu number for different n values. The aspect ratio of the curved wall affects the flow field slightly while the average Nu variation becomes 5%. Average Nu number increases with higher solid particle volume fraction and with smaller particle size. At the highest particle size, it is increased by about 14%. There is 7% variation in the average Nu number when cases with lowest and highest particle size are compared. Finally, convective heat transfer performance modeling with four inputs and one output is successfully obtained by using Adaptive Neuro-Fuzzy Interface System (ANFIS) which provides fast and accurate prediction results. Full article

(This article belongs to the Special Issue Thermal Management in Energy Systems)

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