Specific heat of nanofluids synthesized by dispersing alumina nanoparticles in alkali salt eutectic
Specific heat of nanofluids synthesized by dispersing alumina nanoparticles in alkali salt eutectic
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DOI：
10.1016/j.ijheatmasstransfer.2014.02.066
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发表时间：
2014-07-01
影响因子：
5.2
通讯作者：
Banerjee, Debjyoti
中科院分区：
文献类型：
--
作者：
Shin, Donghyun;Banerjee, Debjyoti
在这项研究中，我们报告了以 1% 质量浓度分散氧化铝纳米颗粒后，低共熔盐混合物的比热容大幅提高。将碳酸锂和碳酸钾（摩尔比为62:38）的共晶与质量浓度为1.0%、公称直径接近10 nm的氧化铝纳米颗粒溶解在蒸馏水中。使用差示扫描量热计(DSC)进行比热容测量。提出了一种涉及原位相变的替代模型，该模型被发现与本研究中使用的不同类型纳米材料样品的实验数据中观察到的变化非常一致。这些盐纳米流体可以促进高效热能存储系统的开发，从而可以显着降低太阳能成本。 (C) 2014 Elsevier Ltd. 保留所有权利。
In this study, we report large enhancement in specific heat capacity of a eutectic salt mixture on dispersing alumina nanoparticles at 1% mass concentration. Eutectic of lithium carbonate and potassium carbonate (62:38 by molar ratio) was dissolved in distilled water with alumina nanoparticles at 1.0% mass concentration and with a nominal diameter of similar to 10 nm. The specific heat capacity measurement was performed using a differential scanning calorimeter (DSC). An alternate model involving in situ phase transformation was proposed which was found to be in good agreement with the variations observed in the experimental data for the different types of nanomaterial samples used in this study. These salt nanofluids can lead to the development of efficient thermal energy storage systems which in turn can enable significant reduction in the cost of solar power. (C) 2014 Elsevier Ltd. All rights reserved.