含石墨烯纳米片的熔融硝酸盐基纳米流体的储热特性

Thermal Storage Properties of Molten Nitrate Salt-Based Nanofluids with Graphene Nanoplatelets.

作者信息

Xie Qiangzhi, Zhu Qunzhi, Li Yan

机构信息

College of Energy and Mechanical Engineering, Shanghai University of Electric Power, No. 2103 Pingliang Road, Yangpu District, 200090, Shanghai, China.

出版信息

Nanoscale Res Lett. 2016 Dec;11(1):306. doi: 10.1186/s11671-016-1519-1. Epub 2016 Jun 21.

DOI:10.1186/s11671-016-1519-1

PMID:27325522

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4916131/

Abstract

In this study, the effect of concentration of nanoparticles on the thermal storage properties of molten nitrate salt-based nanofluids with graphene nanoplatelets (GNPs) was investigated. Solar salt consisting of sodium nitrate and potassium nitrate was utilized as the base material for the nanofluids. Homogeneous dispersion of GNPs within the solar salt was observed through scanning electron microscopy analysis. For both solar salt and resultant nanofluids, differential scanning calorimetry was employed to measure the thermal storage properties, including characteristic temperatures of phase change, startup heat, and specific heat capacity (SHC). A maximum increase of 16.7 % in SHC at the liquid phase was found at an optimal concentration of 1 wt% of GNPs. At the same concentration, the onset temperature decreased by 10.4 °C, the endset temperature decreased by 4.7 °C, and the startup heat decreased by 9 %.

摘要

在本研究中，研究了纳米颗粒浓度对含石墨烯纳米片（GNPs）的熔融硝酸盐基纳米流体储热性能的影响。由硝酸钠和硝酸钾组成的太阳盐被用作纳米流体的基础材料。通过扫描电子显微镜分析观察到GNPs在太阳盐中的均匀分散。对于太阳盐和所得纳米流体，采用差示扫描量热法测量储热性能，包括相变特征温度、起始热和比热容（SHC）。在GNPs的最佳浓度为1 wt%时，发现液相中的SHC最大增加了16.7%。在相同浓度下，起始温度降低了10.4°C，结束温度降低了4.7°C，起始热降低了9%。