Heat and mass transportation properties of binary chloride salt as a high-temperature heat storage and transfer media
Heat and mass transportation properties of binary chloride salt as a high-temperature heat storage and transfer media
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二元氯化盐作为高温储热和传热介质的传热和传质特性
DOI：
10.1016/j.solmat.2020.110415
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发表时间：
2020-06
影响因子：
6.9
通讯作者：
Wang Weilong
中科院分区：
文献类型：
--
作者：
Xie Wenjun;Ding Jing;Pan Gechuanqi;Fu Qianmei;Wei Xiaolan;Lu Jianfeng;Wang Weilong
熔融二元氯化物盐被认为是聚光太阳能发电（CSP）站中有前途的传热和储存介质。需要计算它们在整个工作温度下的性能，因为它们在高温条件下难以测量。可靠的数值方法是从微观结构角度准确预测熔盐热物性的一种替代工具。基于有效Born-Mayer-Huggins（BMH）对势模型，采用分子动力学（MD）方法计算了锂-氯化钾体系的局域结构和热力学性质，计算结果与文献实验数据吻合较好.模拟结果表明，BMH力场适用于预测各种氯化物熔盐及其混合物的性质。上述热物性参数的最小误差均在11.1%以内，准确可靠。结果表明，Li+有效地促进了体系的扩散.此外，随着Li+含量的增加，材料的比热容和热导率显著提高。本工作建立的热物性数据库和热结构数据库，对准确设计材料结构和调节储热系统性能具有重要意义。
Molten binary chloride salts are considered as promising heat transfer and storage mediums in a Concentrating Solar Power (CSP) Station. The properties of them over the entire operating temperature are required to be calculated, since they are difficult to be measured under high-temperature conditions. Reliable numerical method is an alternative tool to accurately predict thermal properties of molten salts from the viewpoint of micro-structure. Based on the effective Born-Mayer-Huggins (BMH) pair potential model, the local structures and thermodynamic properties of lithium-potassium chloride were computed by using Molecular Dynamics simulations (MD) and the results are consistent with available experimental literature data. The simulation results prove that BMH force field is reasonable to be adopted to predict the properties of various molten chloride salts and their mixtures. The minimum errors of thermal properties above are all within 11.1%, which is accurate and reliable. The results show that Li+promotes the diffusion of the system efficiently. In addition, the specific heat capacity and thermal conductivity are significantly improved with the increase of Li+. The database of thermal properties and structures of this work are significant for accurate design of material structure and regulation of thermal storage system performance.
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用于高温热能储存的碱金属氯化物盐的热和传输特性的分子模拟
DOI：
10.1016/j.ijheatmasstransfer.2016.07.042
发表时间：
2016
影响因子：
5.2
作者：
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DOI：
10.1021/j150560a027
发表时间：
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期刊：
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影响因子：
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影响因子：
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