化工新型材料

化工新型材料 ›› 2019, Vol. 47 ›› Issue (4) : 175-179.

科学研究

纳米SiO₂对三元硝酸盐热物性的影响

胡繁昌,李德英,熊亚选,王振宇

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Influence of SiO₂ nanoparticle on the thermal property of ternary nitrate

Hu Fanchang, Li Deying, Xiong Yaxuan, Wang Zhenyu

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摘要

为改善混合熔盐的性能,以分析纯LiNO₃、NaNO₃、KNO₃配制出摩尔比为38∶15∶47的三元硝酸盐,并分别将质量分数为0.3%、0.5%、0.7%、1.0%、1.3%、1.5%的纳米SiO₂(10nm)加入其中,制备出6种不同的纳米熔盐。利用同步热分析仪对三元硝酸盐和纳米熔盐的熔点、熔化潜热、比热和分解温度进行实验研究,结果表明添加纳米SiO₂能够显著增强三元硝酸盐的熔化潜热、比热和分解温度,但对其熔点的影响不明显。与三元硝酸盐相比,添加SiO₂纳米材料后的纳米熔盐的熔点最大降低1.2℃,熔化潜热最高增加17.5J/g,分解温度增大9.3～19.6℃,比热平均提高14.7%～24.5%。

Abstract

In order to improve the performance of mixed molten salts,ternary nitrate salt was prepared by analytical reagent LiNO₃,NaNO₃ and KNO₃(38∶15∶47 by molar ratio),and added SiO₂ nanoparticles (10nm) with mass fraction of 0.3%,0.5%,0.7%,1.0%,1.3% and 1.5%,respectively,6 different nano-molten salts were prepared.Experimental study on the melting point,fusion latent heat,specific heat and decomposition temperature of ternary nitrate and nano-molten salt used simultaneous thermal analysis(STA).The results showed that the addition of SiO₂ nanoparticles can significantly enhance the latent heat of fusion,specific heat and decomposition temperature of ternary nitrate,and its effect on melting point was not obvious.Compared with ternary nitrate,the melting point of nano-molten salt was decreased by a maximum 1.2℃,the latent heat of fusion was increased by up to 17.5J/g,increased 9.3～19.6℃ of decomposition temperature,and the specific heat increased by 14.7～24.5%.

关键词

纳米SiO₂ / 硝酸盐 / 熔点 / 熔化潜热 / 比热 / 分解温度

Key words

SiO₂ nanoparticle / nitrate salt / melting point / fusion latent heat / specific heat / decomposition temperature

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纳米SiO₂对三元硝酸盐热物性的影响[J]. 化工新型材料, 2019, 47(4): 175-179 DOI:

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参考文献

原文顺序 | 出版日期 | 本文引用

[1] Kenisarin M M.High-temperature phase change materials for thermal energy storage[J].Renewable & Sustainable Energy Reviews,2010,14(3):955-970.
[2] Khanafer K,Tavakkoli F,Vafai K,et al.A critical investigation of the anomalous behavior of molten salt-based nanofluids[J].International Communications in Heat & Mass Transfer,2015,69:51-58.
[3] Vignarooban K,Xu X,Wang K,et al.Vapor pressure and corrosivity of ternary metal-chloride molten-salt based heat transfer fluids for use in concentrating solar power systems[J].Applied Energy,2015,159:206-213.
[4] Cheng W J,Chen D J,Wang C J.High-temperature corrosion of Cr-Mo steel in molten LiNO₃-NaNO₃-KNO₃,eutectic salt for thermal energy storage[J].Solar Energy Materials & Solar Cells,2015,132(132):563-569.
[5] Cingarapu S,Singh D,Timofeeva E V,et al.Use of encapsulated zinc particles in a eutectic chloride salt to enhance thermal energy storage capacity for concentrated solar power[J].Renewable Energy,2015,80(1):508-516.
[6] Liu M,Gomez J C,Turchi C S,et al.Determination of thermo-physical properties and stability testing of high-temperature phase-change materials for CSP applications[J].Solar Energy Materials and Solar Cells,2015,139:81-87.
[7] Wu M,Xu C,He Y.Cyclic behaviors of the molten-salt packed-bed thermal storage system filled with cascaded phase change material capsules[J].Applied Thermal Engineering,2016,93:1061-1073.
[8] Bauer T,Pfleger N,Breidenbach N,et al.Material aspects of Solar Salt for sensible heat storage[J].Applied Energy,2013,111:1114-1119.
[9] Peng Q,Ding J,Wei X,et al.The preparation and properties of multi-component molten salts[J].Applied Energy,2010,87(9):2812-2817.
[10] Wu Y,Li Y,Ren N,et al.Improving the thermal properties of NaNO₃-KNO₃ for concentrating solar power by adding additives[J].Solar Energy Materials and Solar Cells,2017,160:263-268.
[11] Khodadadi J M,Fan L,Babaei H.Thermal conductivity enhancement of nanostructure-based colloidal suspensions utilized as phase change materials for thermal energy storage:a review[J].Renewable and Sustainable Energy Reviews,2013,24:418-444.
[12] Seo J,Shin D.Enhancement of specific heat of ternary nitrate (LiNO₃-NaNO₃-KNO₃) salt by doping with SiO₂ nanoparticles for solar thermal energy storage[J].Micro & Nano Letters,2014,9(11):817-820.
[13] Devaradjane R,Shin D.Nanoparticle dispersions on ternary nitrate salts for heat transfer fluid applications in solar thermal power[J].Journal of Heat Transfer,2016,138(5):051901.
[14] Chieruzzi M,Miliozzi A,Crescenzi T,et al.A new phase change material based on potassium nitrate with silica and alumina nanoparticles for thermal energy storage[J].Nanoscale Research Letters,2015,10(1):273.
[15] Seo J,Shin D.Size effect of nanoparticle on specific heat in a ternary nitrate (LiNO₃-NaNO₃-KNO₃) salt eutectic for thermal energy storage[J].Applied Thermal Engineering,2016,102:144-148.
[16] Myers Jr P D,Alam T E,Kamal R,et al.Nitrate salts doped with CuO nanoparticles for thermal energy storage with improved heat transfer[J].Applied Energy,2016,165:225-233.
[17] Coscia K,Nelle S,Elliott T,et al.Thermophysical properties of LiNO₃-NaNO₃-KNO₃ mixtures for use in concentrated solar power[J].Journal of Solar Energy Engineering,2013,135(3):034506.
[18] Coscia K,Elliott T,Mohapatra S,et al.Binary and ternary nitrate solar heat transfer fluids[J].Journal of Solar Energy Engineering,2013,135(2):021011.
[19] Shin D,Banerjee D.Enhancement of specific heat capacity of high-temperature silica-nanofluids synthesized in alkali chloride salt eutectics for solar thermal-energy storage applications[J].International Journal of Heat and Mass Ttransfer,2011,54(5-6):1064-1070.
[20] Dudda B,Shin D.Effect of nanoparticle dispersion on specific heat capacity of a binary nitrate salt eutectic for concentrated solar power applications[J].International Journal of Thermal Sciences,2013,69:37-42.
[21] Kearney D,Herrmann U,Nava P,et al.Assessment of a molten salt heat transfer fluid in a parabolic trough solar field[J].Journal of Solar Energy Engineering,2003,125(2):170-176.