Energy storage hydrothermal and entropy analysis of micro-polar Nano-encapsulated phase change materials under the effect of exothermic reaction and external magnetic field

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2025-03-11 DOI:10.1016/j.csite.2025.106010

Ahmed M. Hassan , Mohammed Azeez Alomari , Abdalrahman Alajmi , Abdellatif M. Sadeq , Faris Alqurashi , Mujtaba A. Flayyih

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引用次数: 0

Abstract

In recent years, the growing demand for electricity has underscored the need for efficient energy storage solutions. This study investigates the energy storage, hydrothermal performance, and entropy analysis of micro-polar nano-encapsulated phase change materials (NEPCMs) under the influence of an exothermic reaction and an external magnetic field. The novelty of this work, which focuses on energy storage applications, lies in the use of a novel geometry and a range of highly effective parameters. The numerical study explores the physical interactions between heat and mass transfer, considering a wide range of parameters, including the Rayleigh number (10³ ≤Ra≤ 10⁵), Lewis number (0.1 ≤ Le ≤ 10), buoyancy ratio (1 ≤ Nz ≤ 5), Hartmann number (0 ≤ Ha ≤50), magnetic field inclination angle (0^o ≤ γ ≤ 90^o), Frank-Kamenetskii number (0 ≤ FK ≤ 2.5), NEPCM concentration (0.01 ≤ ϕ ≤ 0.035), fusion temperature (0.01 ≤ θ_f ≤ 0.035), Stefan number (0.1 ≤ Ste ≤0.9), and aspect ratio (0.5≤AR≤1.5). The results demonstrate that increasing Ra enhances the average Nusselt number (Nu_av) by up to 429.9 % and the average Sherwood number (Sh_av) by up to 206 %, while increasing the total entropy generation (S_total) by up to 13,014 %. Increasing FK reduces Nu_av by up to 27.8 % but increases Sh_av by up to 42.7 %. The Le, Nz, and ϕ significantly impact the hydrothermal performance and entropy generation, with Nu_av increasing by up to 36.3 % and Sh_av decreasing by up to 5.6 % as ϕ increases. The Ha substantially reduces Nu_av and Sh_av by up to 62.3 % and 31.2 %, respectively, while the γ exhibits a non-monotonic behavior with an optimal angle around 60°. The most prominent conclusions highlight the complex interplay between various parameters, with Ra, Le, Nz, and Ha having substantial effects on the hydrothermal performance and entropy generation. The findings provide valuable insights for optimizing the design and operation of energy storage systems based on micro-polar NEPCMs.

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来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.