The Effects of Graphene on Microstructural and Thermal Properties of Calcium Chloride Hexahydrate PCM

Jesbains Kaur, Nurfatihah Jamil, S. Shahabuddin, A. Pandey, R. Saidur, Fitwi Yohaness, Baljit Singh
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引用次数: 2

Abstract

Phase change materials (PCMs) are the excellent option used to store thermal energy as latent heat which substantially contribute to the efficient use and conservation of waste heat and solar energy. There are very few studies on nano enhanced inorganic PCM especially calcium chloride hexahydrate. Therefore, the aim of this paper is to examine the effects of graphene on the microstructural and thermal properties of calcium chloride hexahydrate. The thermal conductivity and morphology of pure PCM and nanoenhanced graphene PCM was investigated using Field emission scanning electron microscope (FESEM), Transmission electron microscope (TEM), 3D Laser microscope (LEXT), KD2 Pro thermal property analyser and Differential scanning calorimeter (DSC) methods. From the microstructural observation, a sharp single lattice fringe proved that graphene has uniformly dispersed with PCM and removed the stacking effect and agglomeration. The thermal conductivity and increased by 20% when 2wt% of graphene were mixed with calcium chloride hexahydrate. This nanoenhanced PCM is suitable for energy storage in solar thermal and photovoltaic thermal applications.
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石墨烯对六水氯化钙PCM微观结构和热性能的影响
相变材料(PCMs)是用于储存热能作为潜热的极好选择,它大大有助于废热和太阳能的有效利用和保护。目前对纳米增强无机PCM特别是六水氯化钙的研究还很少。因此,本文的目的是研究石墨烯对六水氯化钙微观结构和热性能的影响。采用场发射扫描电镜(FESEM)、透射电镜(TEM)、三维激光显微镜(LEXT)、KD2 Pro热性能分析仪和差示扫描量热仪(DSC)等方法研究了纯PCM和纳米增强石墨烯PCM的热导率和形貌。从微观结构观察来看,石墨烯具有清晰的单晶格条纹,证明石墨烯与PCM均匀分散,消除了堆积效应和团聚现象。当2wt%的石墨烯与六水氯化钙混合时,其导热系数和导热系数提高了20%。这种纳米增强型PCM适用于太阳能热能和光伏热能的储能应用。
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