Numerical analysis of solidification of PCM in a closed vertical cylinder for thermal energy storage applications

İzgi, Burak; Arslan, Mevlüt

doi:10.1007/s00231-020-02911-z

Cited by 13 publications

(5 citation statements)

References 32 publications

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“…According to their results, adding 1 wt% of graphene and 4 wt% of fumed silica enhanced the thermal conductivity of the PCM composite by 55.4% and helped to eliminate the PCM leakage problem. Izgi et al [ 25 ] studied the solidification process of a PCM inside a three-dimensional cylinder. They focused on finding controlling parameters for this phenomenon.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Heat Transfer for NePCM-Melting-Based Thermal Energy of Finned Heat Pipe

et al. 2021

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Using phase change materials (PCMs) in energy storage systems provides various advantages such as energy storage at a nearly constant temperature and higher energy density. In this study, we aimed to conduct a numerical simulation for augmenting a PCM’s melting performance within multiple tubes, including branched fins. The suspension contained Al2O3/n-octadecane paraffin, and four cases were considered based on a number of heated fins. A numerical algorithm based on the finite element method (FEM) was applied to solve the dimensionless governing system. The average liquid fraction was computed over the considered flow area. The key parameters are the time parameter (100 ≤t≤600 s) and the nanoparticles’ volume fraction (0%≤φ≤8%). The major outcomes revealed that the flow structures, the irreversibility of the system, and the melting process can be controlled by increasing/decreasing number of the heated fins. Additionally, case four, in which eight heated fins were considered, produced the largest average liquid fraction values.

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Section: Introductionmentioning

confidence: 99%

Enhanced Heat Transfer for NePCM-Melting-Based Thermal Energy of Finned Heat Pipe

et al. 2021

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“…CFD methods have also been used to improve the performance of macroencapsulation PCM. Izgi and Arslan 265 suggested that the solidification time of the PCM could be reduced by 50% for a vertical capsule with a smaller diameter of 15 mm compared with 25 mm. Soodmand et al 266 assessed the melting and solidification properties of a PCM encapsulated in triangular, rectangular, and cylindrical closures in vertical or horizontal orientations.…”

Section: Thermal Enhancementmentioning

confidence: 99%

Recent Advances in CFD Simulations of Multiphase Flow Processes with Phase Change

Zhu

Zhang

et al. 2023

Ind. Eng. Chem. Res.

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Phase change is a phenomenon that has been extensively utilized in chemical engineering, energy, electronics, vehicle, and space exploration. From both the science and engineering perspectives, gaining a profound understanding of the intricacies of multiphase flow processes accompanied by heat and mass transfer due to phase change is of fundamental importance. Indeed, the computational fluid dynamics (CFD) has been increasingly applied as an effective tool to give an in-depth and efficient analysis of the phase change processes, thereby enhancing our understanding and capacity to control and optimize the phase change effects in these processes. This paper seeks to provide a comprehensive review of the utilization of CFD methodologies in the simulations of phase change flows across various applications, including temperature management, drying, separation and purification, and others. First, the CFD models at various scales that are developed to elucidate the phase change processes are summarized. Second, the noteworthy advances in the recent CFD simulation work on various phase change processes are presented, respectively. Finally, the challenges and potential prospects to facilitate the application of the phase change flow are discussed. The current review aims to offer insightful guidance for the CFD modeling of phase change processes in numerous engineering application scenarios.

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“…After t = 5 h, with the copper foam, the entire volume of the PCM was in the melting range; on the contrary, with the pure PCM, only 59.4% of the case volume was in that range. From t = 9 h to t = 13 h, the copper-foam-loaded PCM was completely involved in the melting process and after t = 13 h about 7.8% of the PCM volume was already in a super-heated liquid state (a liquid state with a temperature higher than the melting one [57]). On the contrary, in the presence of pure PCM, the more time that passes, the higher the thermal difference between the top and bottom layers becomes: after t = 9 h, the solid phase was still present on the case bottom; after t = 13 h, there was no more solid PCM, but the thermal distribution indicates how the PCM layers close to the heater were in a liquid state, while the bottom layers were still involved in the melting process.…”

Section: Comparison Between Pure Pcm and Copper-foam-loaded Pcmmentioning

confidence: 99%

Experimental Investigation on Latent Thermal Energy Storages (LTESs) Based on Pure and Copper-Foam-Loaded PCMs

et al. 2022

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In this work, a commercial paraffin PCM (RT35) characterized by a change range of the solid-liquid phase transition temperature Ts−l = 29–36 ∘C and the low thermal conductivity λSL = 0.2 W/m K is experimentally tested by submitting it to thermal charging/discharging cycles. The paraffin is contained in a case with a rectangular base and heated from the top due to electrical resistance. The aim of this research is to show the benefits that a 95% porous copper metal foam (pore density PD=20PPI) can bring to a PCM-based thermal storage system by simply loading it, due to the consequent increase in the effective thermal conductivity of the medium (λLOAD = 7.03 W/m K). The experimental results highlight the positive effects of the copper foam presence, such as the heat conduction improvement throughout the system, and a significant reduction in time for the complete melting of the PCM. In addition, the experimental data highlight that in the copper-foam-loaded PCM the maximum temperature reached during the heating process is lower than 20K with respect to the test with pure PCM, imposing the same heat flux on the top (P=3.5 W/m2).

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Numerical analysis of solidification of PCM in a closed vertical cylinder for thermal energy storage applications

Cited by 13 publications

References 32 publications

Enhanced Heat Transfer for NePCM-Melting-Based Thermal Energy of Finned Heat Pipe

Enhanced Heat Transfer for NePCM-Melting-Based Thermal Energy of Finned Heat Pipe

Recent Advances in CFD Simulations of Multiphase Flow Processes with Phase Change

Experimental Investigation on Latent Thermal Energy Storages (LTESs) Based on Pure and Copper-Foam-Loaded PCMs

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