Effect of filler size on thermal properties of paraffin/silver nanoparticle composites

Kim, In-Hyun; Sim, Hyo-Won; Hong, Hee-Hyeon; Kim, Dongwoo; Lee, Wonjoo; Lee, Dong-Koo

doi:10.1007/s11814-019-0282-2

Cited by 23 publications

(13 citation statements)

References 46 publications

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“…Kim et al investigated the effect of three different sizes of Ag NPs loaded to paraffin. They found that the process of increasing the thermal conductivity of their NePCMs had no logical relationship with the size of the nanoparticles used 42 …”

Section: Resultsmentioning

confidence: 99%

Enhancing thermophysical properties of phase change material via alumina and copper nanoparticles

Jafarian

Gracia

Omid

et al. 2021

Intl J of Energy Research

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Summary The usage of phase change materials (PCMs) in thermal energy storage (TES) systems has been a promising approach in recent years. An accurate estimation of their thermophysical properties is a key factor in their optimal and efficient performance in TES systems. In this study, aluminum oxide (Al2O3) and copper (Cu) nanoparticles were incorporated in paraffin wax as a PCM to enhance its thermophysical properties. The effects of the nanoparticle type, mass fraction, and its size on the specific heat, density, thermal conductivity, and TES density of the nanocomposites, were investigated. A field emission scanning electron microscope (FESEM) was used to study their morphology. The experiments were based on three factors, nanoparticle type (Al2O3 and Cu), nanoparticle mass fraction (1%, 3%, and 6%), and nanoparticle size (30, 70, and 110 nm), while pure paraffin wax was applied as the control sample. The addition of nanoparticles to paraffin has been proven to be a promising technique. The results showed that the specific heat changes of the NePCMs have not been influenced by the factors under consideration. Also, higher mass fractions and smaller sizes of nanoparticles resulted in higher densities in NePCMs. Moreover, the thermal energy storage density of NePCMs increased at higher loading and smaller size of the nanoparticles. The improvement in thermal conductivity is especially significant if the smallest nanoparticle size with mass fractions of 3% and 6% is used. An improvement in thermal conductivity of up to 72% has been achieved at a mass fraction of 6% of 30 nm copper nanoparticles. Finally, the NePCM containing 6% mass fraction and 30 nm size of the nanoparticle (A6S and C6S) were selected as optimal NePCMs.

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Section: Resultsmentioning

confidence: 99%

Enhancing thermophysical properties of phase change material via alumina and copper nanoparticles

Jafarian

Gracia

Omid

et al. 2021

Intl J of Energy Research

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“…Kim et al [ 156 ] prepared composite PCM by blending Ag nanoparticles (AgNPs) with molten PW under ultra-sonication. The results show that the introduction of AgNPs can improve the thermal conductivity of Ag/PW composites.…”

Section: Thermally Conductive Pcm (Thermal-storage Thermal Management Material)mentioning

confidence: 99%

Recent Advances in Design and Preparation of Polymer-Based Thermal Management Material

Zhang

Shi

2021

Polymers

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The boosting of consumer electronics and 5G technology cause the continuous increment of the power density of electronic devices and lead to inevitable overheating problems, which reduces the operation efficiency and shortens the service life of electronic devices. Therefore, it is the primary task and a prerequisite to explore innovative material for meeting the requirement of high heat dissipation performance. In comparison with traditional thermal management material (e.g., ceramics and metals), the polymer-based thermal management material exhibit excellent mechanical, electrical insulation, chemical resistance and processing properties, and therefore is considered to be the most promising candidate to solve the heat dissipation problem. In this review, we summarized the recent advances of two typical polymer-based thermal management material including thermal-conduction thermal management material and thermal-storage thermal management material. Furtherly, the structural design, processing strategies and typical applications for two polymer-based thermal management materials were discussed. Finally, we proposed the challenges and prospects of the polymer-based thermal management material. This work presents new perspectives to develop advanced processing approaches and construction high-performance polymer-based thermal management material.

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“…The properties of NePCM are recalculated when the nanoparticles are added. The density and the specific heat for the NePCM are determined using Equations (9) and (10) 33,34 :…”

Section: Nano-enhanced Pcmmentioning

confidence: 99%

Numerical analysis of a built‐in thermal storage system of metal hydride and nanoparticles enhanced phase change material and nanofluid

Elarem

Alqahtani

Mellouli

et al. 2020

Intl J of Energy Research

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This study presents the numerical investigation of the performance improvement of Metal Hydride (MH) bed equipped with nano-enhanced phase change material (NePCM) jacket for heat reaction recovery via U-tube heat exchanger using Nanofluid. In this study, Mg 2 NiH 6 is used as an MH bed, sodium nitrate (NaNO₃) as heat storage medium (PCM), and sodium-potassium nitrate (60% NaNO₃-40% KNO₃) as a heat transfer fluid (HTF). A computational model for this system is developed and validated. Furthermore, the hydriding of the MH bed, the melting of NePCM, and the overall heat transfer characteristics are simulated. With this model, the effect of a few types of nanoparticle additives on the hydriding process is investigated. The nanoparticles of iron oxide (Fe 2 O 3) and copper oxide (CuO) are dispersed at various concentrations (to a range of 0-1.5 wt.%) in the HTF. Further, CuO and graphene nanoparticles are added to the PCM to a range of 0 to 5 wt.%. The simulation shows that a reduction of hydriding process time by 33.5% is possible by using this MH-Nanofluid-NePCM system in comparison with a conventional MH bed system. The use of nanoparticles in the HTF, at an optimum flow rate, did not show a significant effect on the enhancement of the hydriding process. Also, the results show that CuO-PCM composite has a greater impact in decreasing the time of complete hydriding relative to graphene-PCM composite.

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Effect of filler size on thermal properties of paraffin/silver nanoparticle composites

Cited by 23 publications

References 46 publications

Enhancing thermophysical properties of phase change material via alumina and copper nanoparticles

Enhancing thermophysical properties of phase change material via alumina and copper nanoparticles

Recent Advances in Design and Preparation of Polymer-Based Thermal Management Material

Numerical analysis of a built‐in thermal storage system of metal hydride and nanoparticles enhanced phase change material and nanofluid

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