Mg(NO3)2·6H2O-LiNO3 eutectic/expanded graphite composite phase change material for thermal energy storage applications

Wang, Hui; Ci, Enda; Li, Xiaoqing; Zhang, Ying; Zhang, Zhenying; Li, Jianqiang

doi:10.1016/j.est.2022.103979

Cited by 13 publications

(6 citation statements)

References 35 publications

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“…Melting enthalpies were 234.5, 240 and 235.7 J/g, respectively. When mass fractions of KBr were 15% and 25%, there were two endothermic peaks appeared in the DSC curve of samples, indicating that the mixture does not form a eutectic PCM 27 . Therefore, the KBr‐DM eutectic with mass ratio of 20%, which has suitable phase transition temperature (141.85°C) and a high enthalpy (240 J/g) was selected in the following work.…”

Section: Resultsmentioning

confidence: 99%

D‐mannitol‐based eutectic composite phase change materials with high thermal conductivity and solar‐thermal conversion

Bai

Qiu

Wang

2022

Intl J of Energy Research

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Summary At present, there are few kinds of phase change materials that suitable for medium temperature heat storage. Among them, sugar alcohols have broad application prospects in the heat storage at medium temperature due to their suitable phase transition temperature. In this work, eutectic phase change material (PCM) was prepared with D‐mannitol as PCM and KBr as melting point modifier. Expanded graphite (EG) was used as thermally conductive support network to prepare shape‐stable composite phase change material (CPCM). The prepared CPCM—10% EG/PCM has an appropriate phase transition temperature (136.88°C), high phase melting enthalpy (215.7 J/g), and good photothermal conversion (81.9%). The thermal conductivity of 10% EG/PCM reached 6.01 W/(m K), which is approximately 10 times higher than D‐mannitol (0.603 W/(m K)). Because of its excellent thermal properties, the applications of CPCM in energy storage and photothermal conversion can be further broadened.

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Section: Resultsmentioning

confidence: 99%

D‐mannitol‐based eutectic composite phase change materials with high thermal conductivity and solar‐thermal conversion

Bai

Qiu

Wang

2022

Intl J of Energy Research

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“…Hydrated salts are stable hydrated salts and unstable hydrated salts. [ 42 ] Unstable hydrated salts lose their crystalline water when they melt, forming hydrated salts with less crystalline water or completely dehydrated inorganic salts. A precipitate will form if the newly generated substance is insoluble in the system.…”

Section: Pcms and Lhtes Technologymentioning

confidence: 99%

Recent Advances in Photovoltaic and Photovoltaic Thermal Technologies of Integrated Phase‐Change Materials: A Review

Fang,

Zhang,

Liu

et al. 2024

Solar RRL

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Photovoltaic (PV) cells convert solar energy into electricity is currently the cleanest and most economical way to generate electricity. Nevertheless, just a portion of the solar power can be transformed into electrical energy, while the remaining portion is converted into heat, leading to an increase in the temperature of the PV cells. The rise in temperature will not only cause a decrease in the electrical efficiency of PV cells, but it may also impact their lifespan. By placing phase change materials (PCMs) on the back of the PV cells, it is possible to decrease the temperature increase and enhance the electrical efficiency. The heat collected by PCMs can also be taken away using liquid cooling and put to use. In this paper, the classification, performance evaluation and composite modification technology of PCMs are introduced in detail. The practical application requirements of PCMs in thermal management of PV cells are discussed, and some new ideas of applying PCMs to PV cells are prospected. Moreover, the prior investigations regarding the incorporation of PCMs with PV systems and PV/T systems have also been compiled, encompassing the various research perspectives and methodologies employed. In addition, the possible development direction in the future is prospected.This article is protected by copyright. All rights reserved.

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“…Energy conversion and storage is an essential way to effectively utilize renewable and clean energy sources [ 4 , 5 ]. Heat energy storage technology which can store the heat from low electricity price periods, solar energy and so on, and release the heat as needed can solve the mismatch between the supply and need of renewable and clean energy [ 6 , 7 ]. Heat energy storage usually can be divided into three ways, which include sensible heat, latent heat and thermo-chemical energy storage [ [8] , [9] , [10] ].…”

Section: Introductionmentioning

confidence: 99%

Preparation and performance of solid thermal energy storage materials based on low-grade pyrophyllite minerals

Wang,

Hu,

et al. 2024

Heliyon

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Mg(NO3)2·6H2O-LiNO3 eutectic/expanded graphite composite phase change material for thermal energy storage applications

Cited by 13 publications

References 35 publications

D‐mannitol‐based eutectic composite phase change materials with high thermal conductivity and solar‐thermal conversion

D‐mannitol‐based eutectic composite phase change materials with high thermal conductivity and solar‐thermal conversion

Recent Advances in Photovoltaic and Photovoltaic Thermal Technologies of Integrated Phase‐Change Materials: A Review

Preparation and performance of solid thermal energy storage materials based on low-grade pyrophyllite minerals

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