Article
Thermodynamics
Shengqi Zhang, Liang Pu, Lingling Xu, Minghao Dai
Summary: This paper explores the effects of heat conduction, natural convection, and secondary flow on the charging performance of phase change material in different types of thermal energy storage systems. It was found that heat conduction is dominant in smooth-tube systems, while secondary flow is dominant in finned-tube systems. Additionally, the use of nonmetallic fins can reduce costs and increase thermal storage density.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Abed Mourad, Naef A. A. Qasem, Aissa Abderrahmane, Riadh Marzouki, Kamel Guedri, Obai Younis, Nehad Ali Shah, Thongchai Botmart
Summary: This work numerically explores the melting process of a nano-enhanced phase change material in thermal energy storage system. The findings show that adding nanoparticles improves the melting process and suggests using longer and thinner fins to enhance heat propagation.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Yang Zhang, BuGong Sun, XiaoBao Zheng, Pradeep Kumar Singh, Hamdi Ayed, Abir Mouldi, Abdullah Mohamed, Sadok Mehrez
Summary: This study investigates the effect of connection angle of L shaped fin on the melting and discharge process of a vertical PCM unit. The results show that selecting an appropriate connection angle can improve the performance of the thermal energy storage system by reducing the melting time and increasing the charging and discharging rates.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Energy & Fuels
Zakaria Elmaazouzi, Imad Ait Laasri, Ayoub Gounni, Mustapha El Alami, El Ghali Bennouna
Summary: This study simulated, modeled and optimized a proposed system for heat transfer enhancement by using the finite element method with annular fins in shell-and-tube storage units. Through comparing multiple fin geometries, the recommended fin parameters were determined to achieve the highest thermal performance.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Energy & Fuels
Zhan Liu, Zihui Liu, Junfei Guo, Fan Wang, Xiaohu Yang, Jinyue Yan
Summary: The use of ladder-shaped fins in a latent heat energy storage system accelerates the melting process and improves the phase change efficiency. Experimental and numerical modeling results show that the ladder-shaped fins optimize the melting channel of the phase change material more effectively than straight fins, leading to significant reduction in melting time.
Article
Thermodynamics
Yuning Chen, Li Feng, Sajjad Shaukat Jamal, Kamal Sharma, Ibrahim Mahariq, Fahd Jarad, Akbar Arsalanloo
Summary: Enhancement of energy storing unit performance is crucial in renewable energy systems. The study showed that downward L shaped fins outperformed upward fins in solidification process, with best performance seen in fins with equal length in vertical and horizontal parts. Low cost Nano-particles of Al2O3 were found to be more effective compared to high cost Nano-particles of Cu.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
B. Dinesh Reddy, S. V. S. Rahul, R. Harish
Summary: Nanoenhanced phase change materials (NEPCMs) have attracted considerable attention due to their enhanced thermal properties and improved heat transfer rates. This study extensively investigates the melting process of NEPCMs confined within a finned eccentric annulus, and examines the effects of parameters such as the number of fins, nanoparticle volume concentration, and nanoparticle size on phase change and heat exchange phenomena. The findings demonstrate the potential for enhanced thermal energy storage using NEPCMs.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
Jiani Wu, Ning Li, Zhiyong Wu
Summary: In this study, a innovative tree-pin-shaped fin was designed and assembled in a lab-scale shell-and-tube LTES unit, which significantly increased the charging and discharging speeds and enhanced the temperature uniformity in the LTES unit. Compared with the LTES unit with the longitudinal fins, the LTES unit with the tree-pin-shaped fins had a 44.6% shorter charging time and a 50.6% shorter discharge time.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Dong-Kwon Kim
Summary: The thermal performances of optimized finned annuli with various fin shapes were compared in this study. A thermal model based on volume averaging theory was developed for finned tube annuli. The results showed that straight-finned annuli had the best thermal performance, while branched fins were not ideal for the case of finned tube annuli.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Biochemistry & Molecular Biology
Mohammad Ghalambaz, Hassan Shirivand, Kasra Ayoubi Ayoubloo, S. A. M. Mehryan, Obai Younis, Pouyan Talebizadehsardari, Wahiba Yaici
Summary: The research aims to improve the thermal charging of a conical shell-tube LHTES unit by optimizing the shell-shape and fin-inclination angle in the presence of nanoadditives. The design parameters have a significant impact on the charging time, with the optimum design being a conical shell with a small radius at the bottom and a large radius at the top. However, too small aspect ratio could increase the charging time.
Article
Energy & Fuels
Xiaohu Yang, Xinyi Wang, Zhan Liu, Xilian Luo, Jinyue Yan
Summary: This study investigates the enhanced heat transfer by adding longitudinal fins in a horizontal shell-and-tube heat storage unit. The results show that the number of fins greatly affects the melting time and increasing the number of fins weakens local natural convection. The study provides practical significance for engineering application research of phase change energy storage.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Thermodynamics
Mohsen Izadi, Hassan Fagehi, Amir Imanzadeh, Sam Altnji, Mohamed Bechir Ben Hamida, Mikhail A. Sheremet
Summary: Thermal energy storages based on phase change materials are advantageous, and their performance depends on the heat exchanger properties. This study investigates the effect of fins on the thermal energy storage devices using an enthalpy-porosity method. The results show that increasing the number of fins can accelerate the melting process and achieve higher temperature gradients and thinner boundary layers under specific conditions.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Thermodynamics
Junfei Guo, Bo Yang, Yuanji Li, Xiaohu Yang, Ya-Ling He, Bengt Sunden
Summary: Adding fins is a promising method to enhance heat transfer. In this study, vertical shell-and-tube thermal energy storage tubes with fins of positive and negative gradient height were analyzed. Results showed that negative gradient fins performed better than positive gradient fins, reducing complete melting time by 32.47% and achieving improvements in time-integral average proportion of phase change materials and suppression of overheated PCMs. Tubes with higher bottom fins also exhibited higher transient maximum velocity and Grashof number improvement compared to uniform fins. The use of negative gradient height fins of -0.8 improved average energy storage by 1.34 times.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Article
Green & Sustainable Science & Technology
Feng Jiang, Hang Wang, Yige Hu, Xiang Ling, Tongtong Zhang
Summary: The use of low-grade industrial waste heat for building heating can facilitate the decarbonization of the heat sector. Latent heat thermal energy storage (LHTES) technology offers advantages in terms of energy storage density, heat storage temperature, technology maturity, and cost. This study focused on improving the performance of heat harvesting and reuse in LHTES devices using fin plate technology. The charging/discharging performance and corrosion behavior of the device with different fin plate materials were investigated.
Article
Energy & Fuels
Lijun Liu, Yaqian Ning, Xiaoqing Li, Xiaoyan Liu
Summary: This study investigates the mechanism of how eccentric fractal finned tubes enhance the solidification performance of latent heat storage units. Through simulations of the solidification process, the study compares different local strengthening schemes and fin angles to determine their effects. The results show that the addition of strengthening structures can significantly reduce the solidification time.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Engineering, Multidisciplinary
Yangyang Yu, Umair Khan, Aurang Zaib, Anuar Ishak, Iskandar Waini, Zehba Raizah, Ahmed M. Galal
Summary: This paper investigates the application of nanofluids in heat transfer enhancement. Through numerical calculations and analysis, the effects of nanofluid-induced dynamic flow and heat transfer characteristics in a porous medium are studied. The impact of various parameters is examined.
AIN SHAMS ENGINEERING JOURNAL
(2023)
Article
Biodiversity Conservation
Khalid Abdulkhaliq M. Alharbi, Fehmi Gamaoun, Indrajit Patra, T. Ch Anil Kumar, Adnan Kareem Gahar, R. Sivaraman, Ahmed M. Galal
Summary: In this study, Nano AA1100/SiC composites were fabricated using accumulative press bonding and the effect of SiC particles on the properties and microstructural evolution of the composites was investigated. The results showed that increasing SiC content enhanced the strength and wear resistance of the composites.
HUMAN AND ECOLOGICAL RISK ASSESSMENT
(2023)
Article
Physics, Applied
K. C. Jagadeesha, R. S. Varun Kumar, G. Sowmya, B. C. Prasannakumara, M. Ijaz Khan, Kamel Guedri, Mohammed Jameel, Ahmed M. Galal
Summary: This study elaborates on the thermal distribution and thermal stress analysis of a hyperbolic- and rectangular-profiled annular fin subjected to radiation, internal heat generation, and convection. By using a mathematical model, the heat transport and steady-state thermal distribution in the fin are examined. The behavior of temperature distribution and thermal stress under various parameters is shown through graphical formations. The analytical results show good agreement with existing studies.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Physics, Applied
Umair Khan, A. Zaib, A. Ishak, I Waini, Zehba Raizah, Ahmed M. Galal
Summary: This study suggests that blood particles containing gold can control and decimate cancer by raising the temperature. Numerical results and sketches show that the magnetic field can interrupt blood flow, accelerate temperature, and slow down blood velocity.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Physics, Applied
Hanumesh Vaidya, Rajashekhar Choudhari, Dumitru Baleanu, K. Prasad, Shivaleela, M. Ijaz Khan, Kamel Guedri, Mohammed Jameel, Ahmed M. Galal
Summary: This study investigates phenomena such as electro-osmosis, peristalsis, and heat transfer and proposes the possibility of constructing biomimetic thermal pumping systems. A mathematical model is developed to examine the mechanisms of magnetohydrodynamics non-Newtonian flow. The findings suggest that electro-osmosis may improve peristaltic flow.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Physics, Applied
Muhammad Nasir, Muhammad Waqas, Nurnadiah Zamri, Mohammed Jameel, Kamel Guedri, Ahmed M. Galal
Summary: This research investigates the flow from a stretchable surface of a thermo-solutal mixed convective non-Newtonian fluid, taking into account the effect of viscous dissipation. The study uses the Buongiorno nanoliquid model with considerations for heat source/sink, thermal radiation, and chemical reaction. Analytical solutions are obtained using homotopy technique, and the results show the influence of various parameters on the flow characteristics.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Physics, Applied
Qasim Ali, Kamel Al-Khaled, Jiyan Omar, Ali Raza, Sami Ullah Khan, M. Ijaz Khan, S. A. Najati, Mowffaq Oreijah, Kamel Guedri, Ahmed M. Galal
Summary: In this paper, a physical phenomenon and concentration source in a one-dimensional fractional differential advection-diffusion equation are studied. The effects of the fractional parameter on solute concentration are analyzed through numerical calculations and discussions.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Physics, Applied
Samina Batool, Kamel Al-Khaled, Sami Ullah Khan, Qazi Mahmood Ul-Hassan, Tasawar Abbas, M. Ijaz Khan, Kamel Guedri, Ahmed M. Galal
Summary: This study focuses on the double diffusion heat transfer phenomenon for the unsteady viscous fluid using non-Fourier relations and thermal radiation impact. The Cattaneo-Christov and Fick's mathematical models are used for the non-Fourier analysis of the heating phenomenon. The transformed systems are analytically predicted via HAM scheme and BVP4C solver, and the convergence of the method is observed. The effect of physical parameters on the model is explained through graphs and tables, and the results are compared with existing literature.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Automation & Control Systems
Ziad M. Ali, Ahmed M. Galal, Salem Alkhalaf, Imran Khan
Summary: The article introduces the importance and method of microgrid in solving the new challenges faced by traditional power grids and energy management under the large-scale application of renewable energy generation technology. Through data mining and feature filtering, the proposed algorithm can accurately derive total transfer capability operation rules from the knowledge base.
INTELLIGENT AUTOMATION AND SOFT COMPUTING
(2023)
Article
Physics, Applied
Naqib Ullah, Rehan Ali Shah, Muhammad Sohail Khan, Aamir Khan, Mowffaq Oreijah, Kamel Guedri, Ahmed M. Galal
Summary: In this research, the unsteady flow over a rotating disk is investigated. Mathematical models for physical systems are developed using the Poisson Nernst-Planck model, Energy equation, and Navier-Stokes equations. The set of partial differential equations is transformed into a set of coupled ordinary differential equations for an electro-viscous flow of nanofluid over a rotating disk through similarity transformations. The unknown physical quantities are analyzed using the Parametric Continuation Method (PCM) with numerical calculations.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Physics, Applied
M. Ijaz Khan, Kamel Al-Khaled, Ali Raza, Sami Ullah Khan, Jiyan Omar, Ahmed M. Galal
Summary: This research study developed a mathematical model for malaria disease and simulated it using the Euler, RK-4, and NSFD schemes. The results showed that the NSFD scheme is stable even for large step sizes, and it was concluded that when parameter R is greater than 1, the disease spreads among the landlord population while it remains stable when R is less than 1.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Materials Science, Multidisciplinary
Ali Hassan, Najah Alsubaie, Fahad M. Alharbi, Abdullah Alhushaybari, Ahmed M. Galal
Summary: This study examines the thermal slip flow of a hybrid ferro-fluid mixture with shape effect of nanoparticles and partial slip, under the constant influence of Stefan suction/blowing impacts. The flow is magnetized with a time-dependent magnetic force in the transverse direction. The impact of partial slip on the magnetized hybrid ferro-fluid is considered, and the effect of different shaped nanoparticles on heat transfer efficiency is analyzed and discussed. The highly nonlinear flow governing equations are transformed into ordinary differential equations using a suitable similarity transform. The motion and temperature profile of spherical shaped nanoparticles of the hybrid ferro-fluid are analyzed and discussed under the influence of suction and blowing effect. The results show that with mass suction S = 1 and partial slip 0.2 <= Sf <= 0.6, reduced shear stress rates and high rates of heat transfer are obtained. It is concluded that the high Lorentz force under suction/blowing effect contracts the thermal boundary of the flow, and laminar shaped nanoparticles increase the temperature profile compared to other shapes.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Astronomy & Astrophysics
Z. Yousaf, Ahmed M. Galal, M. Z. Bhatti, A. Farhat
Summary: This manuscript studies the inhomogeneity in the energy density for the relativistic dynamical charged system by considering the anisotropic distribution of radiating fluid and using the f(G, T-2) theory. The results show that modified terms and charge have a considerable impact on the fluid inhomogeneity in both non-radiating and radiating scenarios.
Article
Engineering, Mechanical
Sohail Rehman, Hashim, Syed Inayat Ali Shah, Ahmed M. Galal
Summary: The use of nanofluid technology as a working fluid in specific channels has greatly improved heat exchange rate. This research focuses on analyzing the heat transfer and flow dynamics of non-Newtonian nanofluids in nonuniform channels. The results show that increasing the heat generation/absorption parameter and Eckert number significantly enhances the temperature profiles in convergent channels.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Hendra Hendra, Dhimas Satria, Hernadewita Hernadewita, Yozerizal Yozerizal, Frengki Hardian, Ahmed M. Galal
Summary: Generators are pivotal in renewable energy power plants, especially in those powered by ocean waves, as they utilize translational and rotational motion components to convert renewable energy sources into electric power. The performance of these generators, in terms of voltage and electric power, is influenced by factors such as magnet type, coil winding count, distance and rotation between magnet and winding, and drive component geometry. The use of different mechanisms, such as pneumatic motion, two-rod motion, and crankshaft motion, can drive these generators. To address the issues of weight, fragility, rigidity, and low rotation speed in older power plants, a generator with a two-rod mechanism is utilized in this research.
