Effect of multi-walled carbon nanotubes on thermal properties of nitrate molten salts

Hamdy, Esraa; Ebrahim, Shaker; Abulfotuh, Fuad; Soliman, Mohamed S.

doi:10.1109/irsec.2016.7983997

Cited by 12 publications

(6 citation statements)

References 12 publications

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“…To address this problem, particles with high thermal conductivity are dispersed into the PCM . This mixture is called composite phase change material (CPCM). − The effects of adding different nanoparticles (such as mica, SiO 2 , Al 2 O 3 , TiO 2 , SiO 2 –Al 2 O 3 , carbon nanotubes, graphene, and fullerene) to molten salts to explore their influence on the thermophysical properties of PCMs were reported. − …”

Section: Introductionmentioning

confidence: 99%

Enhancement of Molten Nitrate Thermal Properties by Reduced Graphene Oxide and Graphene Quantum Dots

et al. 2020

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Eutectic molten salts are the most studied medium-high temperature thermal energy storage material due to their potential use in concentrated solar power plants. The aim of this work is to investigate the effect of using reduced graphene oxide (RGO) and graphene quantum dots (GQDs) on the thermal properties of eutectic molten salts. A binary nitrate eutectic mixture of NaNO 3 and KNO 3 was selected as a base material (BM) for nitrate/carbon-derivative composites. RGO and GQDs were individually mixed with the BM with different fractions ranged from 0.1 to 1.5 wt %. The results showed that RGO enhanced the thermal conductivity, heat of fusion, and total thermal energy storage capacity by 52.10%, 44.48%, and 10.44%, respectively. GQDs slightly improved the specific heat capacity for both solid and liquid phases by 2.53% and 3.13%, respectively. In addition, GQDs promoted the heat of fusion by 31.72% and raised the total TES capacity by 12.26%.

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Section: Introductionmentioning

confidence: 99%

Enhancement of Molten Nitrate Thermal Properties by Reduced Graphene Oxide and Graphene Quantum Dots

et al. 2020

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“…The thermal conductivity was found to increase with the weight fraction of MWCNTs and the testing temperature. Hamdy et al [70] mixed Solar Salt with 0.1-1.5 wt% MWCNTs and enhanced the thermal conductivity by 21.9-50.9%. Wu et al [71] prepared Solar Salt/MWCNTs composites with smaller MWCNT amounts by Hamdy's method and showed that 0.3 wt% MWCNTs could increase the thermal conductivity by a factor of 3.…”

Section: Incorporating Highly Thermal Conductive Particlesmentioning

confidence: 99%

Medium- and high-temperature latent and thermochemical heat storage using metals and metallic compounds as heat storage media: A technical review

et al. 2020

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“…The GNPs concentration of 1 wt% achieved the maximum enhancement of 16.7% for the liquid specific heat capacity of solar salt. Hamdy et al dispersed the composites of multi‐walled carbon nanotubes (MWCNTs) into solar salt at four different weight fractions, 0.1%, 0.5%, 1.0%, and 1.5%. The measurement results showed that the heat capacity and thermal conductivity were both significantly enhanced due to the dispersion of the MWCNTs.…”

Section: Introductionmentioning

confidence: 99%

Characterization of molten salt doped with different size nanoparticles of Al ₂ O ₃

et al. 2019

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Summary This paper aims to study the effect on the characteristics of molten salt because of the dispersion of different size nanoparticles of Al2O3. The eutectic mixture of 54 wt% KNO3 and 46 wt% NaNO3 was selected as the base salt. Five different size nanoparticles of Al2O3, 80, 135, 200, 300, and 1000 nm, were dispersed into the base salt at a mass concentration of 1% to make the nanomaterials by a two‐step method, respectively. Thermal properties of the base salt and the samples with Al2O3 nanoparticles, including the melting point temperature, fusion heat, specific heat capacity, and thermal diffusivity, were measured with differential scanning calorimeter (DSC) and Xenon Flash Apparatus (XFA). On the basis of the measured specific heat capacities and thermal diffusivities, their thermal conductivities in the solid state were calculated at discrete specified temperatures. The results showed that the dispersions of 200‐ and 135‐nm Al2O3 nanoparticles could enhance the average solid and liquid specific heat capacities by up to 17.2% and 19.7%, respectively. The research on thermal diffusivity and thermal conductivity also verified that the influences of different size nanoparticles were different. Although no new strong intensity peaks or peak position variations were found in the diffraction patterns of the two samples with 80‐ and 1000‐nm nanoparticles of Al2O3, the larger deviations in the lower wavenumber region still meant possible crystalline structure variation because of the dispersion of Al2O3 nanoparticles. Scanning electronic microscope (SEM) images showed the inhomogeneity and the agglomeration of dispersed nanoparticles in the base salt, and the formation of a nanolayer around the nanoparticles could be a possible explanation to the thermal‐physical property variation.

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Effect of multi-walled carbon nanotubes on thermal properties of nitrate molten salts

Cited by 12 publications

References 12 publications

Enhancement of Molten Nitrate Thermal Properties by Reduced Graphene Oxide and Graphene Quantum Dots

Enhancement of Molten Nitrate Thermal Properties by Reduced Graphene Oxide and Graphene Quantum Dots

Medium- and high-temperature latent and thermochemical heat storage using metals and metallic compounds as heat storage media: A technical review

Characterization of molten salt doped with different size nanoparticles of Al ₂ O ₃

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Effect of multi-walled carbon nanotubes on thermal properties of nitrate molten salts

Cited by 12 publications

References 12 publications

Enhancement of Molten Nitrate Thermal Properties by Reduced Graphene Oxide and Graphene Quantum Dots

Enhancement of Molten Nitrate Thermal Properties by Reduced Graphene Oxide and Graphene Quantum Dots

Medium- and high-temperature latent and thermochemical heat storage using metals and metallic compounds as heat storage media: A technical review

Characterization of molten salt doped with different size nanoparticles of Al 2 O 3

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Characterization of molten salt doped with different size nanoparticles of Al ₂ O ₃