Thermal and energetic behaviour of solid-solid-liquid phase change materials storage unit: Experimental and numerical comparative study of the top, bottom and horizontal configurations

Harmen, Yasser; Chhiti, Younes; Alaoui, Fatima Ezzahrae M’hamdi; Bentiss, Fouad; Khouakhi, Mohamed El; Jama, Charafeddine; Duquesne, Sophie; Bensitel, M.; Deshayes, Laurent

doi:10.1016/j.est.2020.102025

Cited by 19 publications

(10 citation statements)

References 41 publications

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“…When describing the reaction kinetics problem (1), 31,32 (1) 𝐴 ′ (𝑠) →𝐵 ′ (𝑠) + 𝐶 ′ (𝑔) two commonly forms of equations are used, differential (2) and integral (3) form ( 2)…”

Section: R a F Tmentioning

confidence: 99%

“…For example, Djalal Trache et al used four isoconversion models (Kissinger-Akahira-Sunose, Flynn-Wall-Ozawa, Trache-Abdelaziz-Siwani, and Vyazovkin) to accurately evaluate the kinetics triplets 33-35, 52, 56-57 . And many scholars use the model matching method to study energetic materials' thermal dynamic 32,[58][59] . In this paper, the model matching method is used to conduct thermal analysis on the typical ammonium perchlorate-based molecular perovskite energetic materials.…”

Section: R a F Tmentioning

confidence: 99%

“…As we all know, the thermal behavior of energetic materials will directly affect its safe production, storage and use. It is one of the most important properties of energetic materials, and thermal analysis kinetics can quickly and easily evaluate the thermal behavior of energetic materials [28][29][30][31][32][33][34][35][36] . In the past few decades, CL-20 [37][38][39] , HMX 40-43 , 1,1diamino-2,2-dinitroethene (FOX-7) [44][45] , Dihydroxylammonium 5,5 ′ -bistetrazole-1,1 ′diolate (TKX-50) [46][47][48][49] , and 2,6-Diamino-3,5-dinitropyrazine-1-oxide (LLM-105) [50][51] are mainly studied to understand the intrinsic properties of their thermal decomposition progresses of explosives.…”

Section: Introductionmentioning

confidence: 99%

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Thermal kinetics, thermodynamics, decomposition mechanism, and thermal safety performance of typical ammonium perchlorate-based molecular perovskite energetic materials

Chen

et al. 2022

Can. J. Chem.

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In this work, we report the thermal kinetics, thermodynamics, and decomposition mechanism of AP-based molecular perovskite energetic materials and estimate their thermal safety performance. Typical AP-based molecular perovskite energetic materials, (H2dabco)[NH4(ClO4)3] (DAP-4), (H2pz)[NH4(ClO4)3](PAP-4), (H2mpz)[NH4(ClO4)3](PAP-M4), and (H2hpz)[NH4(ClO4)3] (PAP-H4), were synthesized and characterized. These were studied using differential scanning calorimetry (DSC). The results show that all of the obtained AP-based molecular perovskite energetic materials have higher thermal decomposition temperatures, and the peak temperatures are more than 360 °C. All follow random nucleation and growth models. Other thermodynamic parameters, such as the reaction enthalpy (ΔH), entropy change (ΔS), and Gibbs free energy (ΔG), show that they are generally thermodynamically stable. Moreover, their adiabatic induced temperatures were obtained; TD24 of DAP-4, PAP-4, PAP-M4, and PAP-H4 were 246.6, 201.2, 194.5, and 217.5 °C, respectively. This study offers an important and in-depth understanding of the thermal decomposition characteristics of AP-based molecular perovskite energetic materials and their potential applications.

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Section: R a F Tmentioning

confidence: 99%

Section: R a F Tmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal kinetics, thermodynamics, decomposition mechanism, and thermal safety performance of typical ammonium perchlorate-based molecular perovskite energetic materials

Chen

et al. 2022

Can. J. Chem.

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“…Sustainable chemistry has emerged as a new concept aimed at developing efficient chemical products and services with natural resources. It includes different areas such as bio-renewable resources, alternative energies, and energy storage [3,4].…”

Section: Introductionmentioning

confidence: 99%

Cactus Cladode Juice as Bioflocculant in the Flocculation-Thickening Process for Phosphate Washing Plant: A Comparative Study with Anionic Polyacrylamide

et al. 2022

Self Cite

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In the phosphate industry, the thickening process is vital to increasing the solid slurry concentration and to recovering water that is as clear as possible. The performance of the thickening process depends mainly on the coagulation–flocculation effect. The thickening process is based on flocculant agents to concentrate particles: flotation and washing plant rejects as large flocs, which accelerate their sedimentation velocity. The phosphate industry worldwide uses synthetical flocculants such as polyacrylamides. These flocculants are non-biodegradable, limiting the process efficiency regarding cost and harmful effects on the environment. This study proposes cactus cladodes juice as an eco-friendly alternative to industrial flocculants. The particle size of the phosphate samples ranges from 0 μm to 160 μm, with a solid concentration of 8%. This bioflocculant allowed for an increase in sedimentation velocity of 95% compared with the case without flocculant. The optimal amount of cactus bioflocculant for decanting 1 tonne of phosphate pulp at pH 7–8 is 1.12 kg. Special attention is paid to understanding the flocculation mechanism. The results of the physicochemical characterization show that the flocculant biopolymers have similar characteristics to anionic polyacrylamide. This work indicates the promising application of the cactus juice bioflocculant in phosphate washing plants.

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“…Nowadays some researchers used PCMs for thermal energy storage. They increased of cooling system performance with latent heat storage methods (Harmen et al , 2021; Gürel, 2020; Nejad, 2020; Soliman et al , 2021; Rezaei et al , 2021; Jenifer et al , 2021; Oudina et al , 2021). In addition, PCMs have recently been used frequently in some research and special applications such as in battery (Putra et al , 2020; Heyhat et al , 2020; Joshy et al , 2020; Verma et al , 2019; Kong et al , 2020), in electronic cooling (Hu and Gong, 2021; Kalbasi, 2021; Gharbi et al , 2015; Kinkelin et al , 2017; Behi et al , 2017) and in convective heat transfer applications with different simulation methods (Akbal et al , 2021; Kousksou et al , 2014; Ben Salah and Ben Hamida, 2019; Lewis, 1987; Comini et al , 1974; Hamdeh et al , 2021; Selimefendigil and Öztop, 2020; Lewis et al , 2004; Nithiarasu et al , 2016).…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis for thermal management of data center with phase change material

Öztop

Özgul

Selimefendigil

2022

HFF

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Purpose The purpose of this paper is to analyze the performance of a data center and thermal management by using phase change material (PCM). Numerical studies were conducted for two dimensional model of data center and installation of PCM at different locations. Design/methodology/approach Finite volume method was used for the unsteady problem, while impacts of air velocity and PCM location on the flow field, thermal pattern variations and phase change dynamics were evaluated. Three different locations of the PCM were considered while air velocity was also varied during the simulation. Thermal field variations and cooling performance of the system for different PCM location scenarios were compared. Findings It was observed that the installation of the PCM has significant impacts on the vortex formation, thermal field variation within the system and its performance. The left, right and top wall installation of the PCM changed the thermal patterns near the heat cell of the data centre. The phase change process is fast for the upper wall installation of the PCM, while the discrepancy of the melt fraction dynamics between different air flow at this position is minimum. The case where PCM placed in the upper wall at the highest air velocity is the best configuration in terms of heat storage. The utilization of PCM and changing its locations provide an excellent tool for thermal management and cooling performance of data centre. Originality/value Results of this study can be used for initial design and optimization of cooling systems for thermal management of data centers while the importance of the high-performance computing becomes very crucial for the advanced simulations in different technological applications.

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Thermal and energetic behaviour of solid-solid-liquid phase change materials storage unit: Experimental and numerical comparative study of the top, bottom and horizontal configurations

Cited by 19 publications

References 41 publications

Thermal kinetics, thermodynamics, decomposition mechanism, and thermal safety performance of typical ammonium perchlorate-based molecular perovskite energetic materials

Thermal kinetics, thermodynamics, decomposition mechanism, and thermal safety performance of typical ammonium perchlorate-based molecular perovskite energetic materials

Cactus Cladode Juice as Bioflocculant in the Flocculation-Thickening Process for Phosphate Washing Plant: A Comparative Study with Anionic Polyacrylamide

Numerical analysis for thermal management of data center with phase change material

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