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首页> 外文期刊>Energy Conversion & Management >Effect of Al2O3 nanoparticle dispersion on the specific heat capacity of a eutectic binary nitrate salt for solar power applications
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Effect of Al2O3 nanoparticle dispersion on the specific heat capacity of a eutectic binary nitrate salt for solar power applications

机译：Al2O3纳米颗粒分散体对太阳能应用中低共熔二硝酸盐的比热容的影响

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摘要

Molten salts can be used as heat transfer fluids or thermal storage materials in a concentrated solar power plant. Improving the thermal properties can influence the utilization efficiency of solar energy. In this study, the effect of doping eutectic binary salt solvent with Al2O3 nanoparticles on its specific heat capacity (c(p)) was investigated. The effects of the mass fraction of nanoparticles on the c(p) of the composite nanofluid were analyzed, using both differential scanning calorimetry measurements and molecular dynamics simulations. The specific heat capacity of the nanocomposites was enhanced by increasing the nanoparticle concentration. The maximum enhancement was found to be 8.3%, at a nanoparticle concentration of 2.0%. A scanning electron microscope was used to analyze the material morphology. It was observed that special nanostructures were formed and the specific heat capacity of the nanocomposites was enhanced by increasing the quantity of nanostructures. Simulation results of c(p) agreed well with the experimental data, and the potential energy and interaction energy in the system were analyzed. The change in Coulombic energy contributed to most of the large change in c(p), which explains the discrepancy in values between conventional nanofluids and molten salt-based nanofluids. (C) 2017 Elsevier Ltd. All rights reserved.
机译：熔融盐可用作集中式太阳能发电厂中的传热流体或储热材料。改善热性能会影响太阳能的利用效率。在这项研究中，研究了用Al2O3纳米颗粒掺杂共晶二元盐溶剂对其比热容（c（p））的影响。使用差示扫描量热法测量和分子动力学模拟，分析了纳米颗粒质量分数对复合纳米流体c（p）的影响。纳米复合材料的比热容通过增加纳米颗粒的浓度来提高。发现在2.0％的纳米颗粒浓度下最大增强为8.3％。使用扫描电子显微镜分析材料形态。观察到，通过增加纳米结构的数量，形成了特殊的纳米结构，并且提高了纳米复合材料的比热容。 c（p）的仿真结果与实验数据吻合良好，并对系统中的势能和相互作用能进行了分析。库仑能的变化促成了c（p）的大部分大变化，这解释了常规纳米流体与基于熔融盐的纳米流体之间的值差异。 （C）2017 Elsevier Ltd.保留所有权利。

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