材料科学
热能储存
复合数
共晶体系
热稳定性
相变材料
储能
复合材料
潜热
热的
化学工程
微观结构
热力学
物理
工程类
功率(物理)
作者
Guanghui Leng,Gang Qiao,Jianhua Zhu,Guizhi Xu,Yue Qin,Chun Chang,Yulong Ding
出处
期刊:Applied Energy
[Elsevier]
日期:2018-05-01
卷期号:217: 212-220
被引量:123
标识
DOI:10.1016/j.apenergy.2018.02.064
摘要
Chloride molten salts are promising candidates for high temperature thermal storage applications, owing to their energy storage density and thermal stability. Nevertheless, the main disadvantage of them is their corrosive behaviour with metal containers, which narrows down the range of applications. Encapsulation is considered a favourable method to prevent the corrosion. In this work, composite thermal storage materials consist of a phase change material (PCM) and a encapsulation material are studied, where the PCM is a mixture of sodium and potassium eutectic salts and the encapsulation material is diatomite. The composite materials which consist of PCMs & encapsulation materials are fabricated using a micro encapsulation method which is a combination of mixing and sintering. After applying the aforementioned method, it is observed that the PCMs are distributed homogeneously in the composite materials. With the help of XRD, it is found that the compounds stay unchanged after the encapsulation process, which indicates that the materials are compatible to each other. In this study, the composite material containing 70 wt% PCM exhibits the most favourable thermal energy storage properties, stability and capsule integrity as it is shown that the latent heat of the aforementioned composite material is observed 179.3 J/g and no significant decline or salt leakage is found after hundreds of heating-cooling cycles.
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