Porous CuCo2O4/CuO microspheres and nanosheets as cathode materials for advanced hybrid supercapacitors

Journal of Energy Storage, Journal Year: 2023, Volume and Issue: 68, P. 107875 - 107875

Published: June 2, 2023

Language: Английский

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Heat transfer treatment of system during freezing with implement of nanoparticles

Case Studies in Thermal Engineering, Journal Year: 2024, Volume and Issue: 58, P. 104410 - 104410

Published: April 18, 2024

The present attempt investigates solidification through a tank equipped with T-shaped fins, crucial aspect of cold storage technology. Utilizing the Finite Element Method (FEM) for simulation, implementation mesh adaptation technique enhances accuracy modeling. Equations are derived based on assumption neglecting velocity effects during solidification, simplifying mathematical framework analysis. Validation numerical approach is conducted comparisons previously published works, affirming reliability methodology. A notable study utilization nanosized powders dispersed within water, serving to bolster system performance. This innovative water conductivity, thereby augmenting rate storage. Employing greater shape factor yields promising results, leading discernible decrease in completion time by approximately 10.6%, attributed heightened conductivity facilitated nanomaterial. Furthermore, investigation explores impact varying volume fractions particles time, revealing significant reduction 32.78% higher particle volumes.

Language: Английский

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Ferromagnetic and ohmic effects on nanofluid flow via permeability rotative disk: significant interparticle radial and nanoparticle radius

Physica Scripta, Journal Year: 2024, Volume and Issue: 99(5), P. 055206 - 055206

Published: March 20, 2024

Abstract The significance of interparticle spacing and nanoparticle radius for the case single-phase nanofluid flow has often been neglected. Tremendous applications this phenomenon can be witnessed in different fields, especially electron microscopes, heat exchange processes, many others. This research highlights vital aspect Ohmic heating over a spinning disk. To ensure novelty, ferromagnetic (Manganese ferrite) incorporated to examine particle explore features transfer. nanofluids are carriers drug delivery systems, cancer treatment, design systems hyperthermia therapy, microfluidic devices used chemical synthesis, etc. quantiles dimensional equations converted into dimensionless ones by adopting similarity transformations solve highly coupled nonlinear numerically, built-in bvp5c MATLAB tool is utilized. effect few revealed factors, velocity temperature distributions, examined via visualization. Furthermore, streamlined plots also visualized. outcomes produced showed excellent agreement with those made literature same direction assuming some exceptional cases on gradients. Further, outstanding results reported as; permeability surface produces suction velocity, enhanced attenuates fluid either pure nanofluid. increase thermal radiation boosts up transfer rate whereas augmentation Eckert number retards it significantly.

Language: Английский

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Heat transfer during discharging of NEPCM through the finned container

Case Studies in Thermal Engineering, Journal Year: 2024, Volume and Issue: 57, P. 104287 - 104287

Published: March 24, 2024

To maximize the efficiency of freezing, combinations using nanoparticles and fins have been utilized in current work. Incorporating nanofluids into solidification processes provides a refined efficient approach to transitioning materials from liquid solid state. Triangular container involving has implemented. The shape fraction were varied this research. derived equations solved via finite element method associated code validated based on prior article. reduction freezing time was presumed as main goal research resource utilization various industries. As greater amount nano-powders is utilized, conduction becomes stronger rate improves about 27%. Also, altering particles applying powders with bigger m can lead by 7%.

Language: Английский

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Numerical investigation with sensitivity study of MHD mixed convective hexagonal heat exchanger using TiO2–H2O nanofluid

Results in Engineering, Journal Year: 2023, Volume and Issue: 18, P. 101136 - 101136

Published: April 28, 2023

This ongoing study is carried out to analyze the thermal performance with sensitivity of a mixed convective hexagonal heat exchanger containing TiO2–H2O nanofluid. Magnetic force regarded be horizontal while all surrounding walls are adiabatic. The finite element method used simulate regulatory equations. For first time, response surface methodology independent factors on exchanger. findings depicted for four parameters, Reynolds number (10 ≤ Re 200), Richardson (0.01 Ri 10), Hartmann (0 Ha 100), and nanoparticle volume fraction φ 0.1) against velocity distribution, average Nusselt (Nuav), streamlines, isotherm lines, heatlines. results indicate that growing value strengthen nanofluid whereas increasing causes it decrease. Moreover, have positive Nuav has negative sensitivity. When maintained at 0, optimal reaches when = 200 0.1. use improves water's transmission ability 17.69%. Finally, this may offer advice creating an effective

Language: Английский

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Management of period of solidification with loading nanoparticles simulating unsteady heat transfer

Case Studies in Thermal Engineering, Journal Year: 2023, Volume and Issue: 53, P. 103928 - 103928

Published: Dec. 20, 2023

This article explores the acceleration of discharge speed through introduction nanoparticles. Utilizing simulations based on Galerkin method, study has developed and examined effects various variables. The utilized tank been equipped with fin additives shape factor (m) volume fraction (ϕ) have dispersed into water. denser mesh near ice front was considered in each time stage involving adaptive grid approach. Also, a validation test presented to illustrate precision modeling. Contours curves for different ranges parameters were exemplified results. quickest process takes 641.19s while longest 877.17s. Increasing m causes conductivity increase enhances about 6.96 %. Moreover, augmenting value ϕ makes period reduce 26.9

Language: Английский

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Designed nanoarchitectonics and fabrication of Ni(OH)2/MWCNT/CNF electrode for asymmetric hybrid supercapacitor applications

Journal of Energy Storage, Journal Year: 2023, Volume and Issue: 72, P. 108532 - 108532

Published: Aug. 2, 2023

Language: Английский

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A numerical investigation of a photovoltaic thermal system contained a trapezoidal channel with transport of silver and titanium oxide using the water as base fluids

Case Studies in Thermal Engineering, Journal Year: 2023, Volume and Issue: 47, P. 103056 - 103056

Published: May 17, 2023

This article presents a numerical investigation of forced convection in PV/T system to reduce the temperature caused by solar radiation, which can decrease its electrical energy production. The study uses two types nanoparticles, namely titanium oxide and silver, combined with water as base fluid. features trapezoidal flow channel, Navier-Stokes equations are solved using COMSOL Multiphysics 6.0 finite element-based computer code obtain an approximate solution. tests range Reynolds number, aspect ratio, volume fraction both nanoparticles (100–1000), (0.4–1), (0.01–0.25), respectively, analyze various impacts selected variables on percentage change cell efficiency varying number ratio between inlet outlet height channel. results indicate that increasing from 100 1000 50% increase 4.4%. Similarly, changing 0.4 1 due 26.2% 1.6%. reveals while fixing channel improve performance. Additionally, fluid enhance system.

Language: Английский

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Acceleration the solidification process of cold-thermal storage/nanoparticles using finned container: A numerical study

Case Studies in Thermal Engineering, Journal Year: 2023, Volume and Issue: 51, P. 103647 - 103647

Published: Oct. 20, 2023

To expedite discharging rate, the curved container is equipped with fin in present study and base PCM (phase change material) was mixed Al2O3 nano-powders. Galerkin based numerical approach applied to model mathematical which includes two equations. The grid adapted location of solid front. homogeneous mixture nanomaterial has been utilized. validated according published work. solidification process primarily relies on pure conduction, a reasonably accurate approximation confirmed during validation step using empirical data. Introducing nanoparticles expedites due enhanced conduction capabilities. It crucial monitor processing time, meticulously recorded for each scenario. A comparative graph presented illustrate this. Contours have depicted at different time intervals demonstrate influence loading additives system. As diameter nano-powders rises, period alters from 2.19s 1.8s 2.28s. water 2.48s reduced about 27.52% nanoparticles.

Language: Английский

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Effects of environmental temperature on the thermal runaway of lithium-ion batteries during charging process

Journal of Loss Prevention in the Process Industries, Journal Year: 2023, Volume and Issue: 83, P. 105084 - 105084

Published: May 11, 2023

Language: Английский

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