Investigation of magnesium nitrate hexahydrate based phase change materials containing nanoparticles for thermal energy storage

Wang, Hui; Guo, Lijiang; Liu, Kaiqi; Song, Zichen; Wu, Liu; Fang, Minghao; Li, Jianqiang

doi:10.1088/2053-1591/ab386f

Cited by 6 publications

(2 citation statements)

References 39 publications

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“…The heat storage capacity of the Al 2 (SO 4 ) 3 ·18H 2 O–FeSO 4 ·7H 2 O–CNT composite is compared with the reported salt hydrates in Table . Since this material combines the desorption and vaporization of water molecules, it offers a much higher energy storage capacity than current salt hydrates for thermal storage. ,− …”

Section: Resultsmentioning

confidence: 99%

Facile Preparation of Binary Salt Hydrates/Carbon Nanotube Composite for Thermal Storage Materials with Enhanced Structural Stability

Zhou¹,

Jiang

Wu³

et al. 2021

ACS Appl. Energy Mater.

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Large-scale distributed thermal storage requires high-energy-density and low-cost thermal storage materials. Here, a concocted composite composed of Al 2 (SO 4 ) 3 •18H 2 O and FeSO 4 •7H 2 O salts, as well as carbon nanotubes (CNTs) as a thermal conductive agent has been proposed for the applications of large-scale distributed thermal storage. The composite was physically mixed but displayed enhanced structural stability due to the use of carbon nanotubes that formed networks in the composite. The use of CNTs could restrain the volume change of the salt mixture in thermal charge/discharge. The detailed thermophysical properties and thermal energy storage performance were studied, including latent heat, thermal conductivity, and thermal cycling stability. A differential scanning calorimeter (DSC) revealed that the largely endothermic temperature and absorbed heat of the composite were 118.43 °C and 422.40 J g −1 , and it also delivered a high stability of ca. almost no capacity fading in exampled 100 cycles. The introduction of the carbon nanotube creates thermal conductivity networks in the composite, endowing the composite material with enhanced thermal conductivities. This can provide rapid thermal storage while retaining the storage density. This study can give insights into the rational design of salt hydrates for thermal storage.

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Section: Resultsmentioning

confidence: 99%

Facile Preparation of Binary Salt Hydrates/Carbon Nanotube Composite for Thermal Storage Materials with Enhanced Structural Stability

Zhou¹,

Jiang

Wu³

et al. 2021

ACS Appl. Energy Mater.

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“…Phase change materials (PCMs) for storing and releasing energy represent promising energy storage media to solve the mismatch between energy supply and demand [1][2][3][4][5][6]. In recent years, it has been widely used in the field of thermal energy storage, such as industrial waste heat recovery [7,8], building heating [9][10][11][12], as well as solar energy systems [13][14][15]. Inorganic salt hydrate PCMs are considered as promising candidates owing to their merits of high latent heat, non-flammability, constant phase change temperature, and low cost [16,17].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Mechanism of Latent Heat Reduction of Sodium Acetate Trihydrate Phase Change Materials

Wang

et al. 2020

Materials

Self Cite

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Sodium acetate trihydrate (SAT) phase change material (PCM) has been well known for thermal energy storage due to its high latent heat and resource abundance. However, SAT suffers from severe latent heat reduction after heating and cooling cycles. Although a few of previous researches showed the reduction could be effectively inhibited by using thickeners, the mechanisms of the reduction process and thickeners’ inhibition have not been deeply explored till now. In this work, SAT modified by 5 wt.% nucleating agent of disodium hydrogen phosphate dodecahydrate (SAT/5 wt.% DSP) was prepared and 200 thermal cycles were carried out. The differential scanning calorimeter, Rheometer, X-ray diffractometry, and scanning electron microscope were used to investigate the extent of latent heat reduction, viscosity, phase composition and microstructure, respectively, and the infrared thermal imaging method was used to evaluate heat storage capacity. It was found that the latent heat of SAT/5 wt.% DSP dropped dramatically and the relative decrease in latent heat was measured to be 22.44%. The lower layer of SAT/5 wt.% DSP contained 24.1 wt.% CH3COONa, which was quantitatively consistent with the reduction extent. Furthermore, the phase change endothermic time of the lower layer was only 44.1% of that of the upper. SAT/5 wt.% DSP was further modified by 3 wt.% thickener of carboxymethyl cellulose (SAT/5 wt.% DSP/3 wt.% CMC) and endured 200 thermal cycles. The extent of the latent heat reduction of SAT/5 wt.% DSP/3 wt.% CMC was only 9.29%, and phase compositions were more homogeneous. The 3 wt.% CMC increased viscosity by 14 times, which effectively prevented the Stokes sedimentation velocity of CH3COONa in melts and inhibited the final macroscopic phase separation.

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Lightweight Metallic Nanocomposites in Energy Applications

Chakraborty

Pramanik

2022

Energy, Environment, and Sustainability

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Investigation of magnesium nitrate hexahydrate based phase change materials containing nanoparticles for thermal energy storage

Cited by 6 publications

References 39 publications

Facile Preparation of Binary Salt Hydrates/Carbon Nanotube Composite for Thermal Storage Materials with Enhanced Structural Stability

Facile Preparation of Binary Salt Hydrates/Carbon Nanotube Composite for Thermal Storage Materials with Enhanced Structural Stability

Experimental Investigation on Mechanism of Latent Heat Reduction of Sodium Acetate Trihydrate Phase Change Materials

Lightweight Metallic Nanocomposites in Energy Applications

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