新型混合硝酸熔盐的制备及热物性研究

doi:10.19799/j.cnki.2095-4239.2020.0237

储能科学与技术 ›› 2021, Vol. 10 ›› Issue (1): 170-176.doi: 10.19799/j.cnki.2095-4239.2020.0237

新型混合硝酸熔盐的制备及热物性研究

盛鹏¹(), 徐丽¹, 赵广耀¹, 韩燕², 吴玉庭²

^1.全球能源互联网研究院有限公司，先进输电技术国家重点实验室，电工新材料技术联合实验室，北京 102209
^2.北京工业大学环境与能源工程学院，传热强化与过程节能教育部重点实验室及传热与能源利用北京市重点实验室，北京 100124

收稿日期:2020-07-03 修回日期:2020-08-03 出版日期:2021-01-05 发布日期:2021-01-08
作者简介:盛鹏（1986—），男，博士，高级工程师，从事储能材料与器件研究，Email：shpjob@163.com。
基金资助:
国家电网有限公司总部科技项目(SGRI-DL-71-16-018)

Preparation and thermophysical properties of novel mixed nitrate molten salts

Peng SHENG¹(), LI XU¹, Guangyao ZHAO¹, Yan HAN², Yuting WU²

^1.State Key Laboratory of Advanced Transmission Technology, Joint Laboratory of Electrician New Material Technology, Global energy Internet research institute Co. Ltd. , Beijing 102209, China
^2.Key Laboratory of Ministry of Education of Heat Transfer Enhancement and Process Energy Conservation, Key Laboratory of Beijing of Heat Transfer and Energy Utilization, School of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China

Received:2020-07-03 Revised:2020-08-03 Online:2021-01-05 Published:2021-01-08

摘要/Abstract

摘要：

本工作通过在47%Ca(NO₃)₂-53%KNO₃(质量分数)二元熔盐中添加不同比例添加剂B或A，经过筛选得到了5种混合熔盐样品，分别对其进行了热物性参数的测试分析。测试结果表明，相比最为常用的太阳盐熔盐，混合熔盐的上下限温度得到拓展，混合熔盐样品中，凝固点最低可达135.2 ℃，分解温度最高可达639.1 ℃。当添加34%(质量分数)添加剂B时，混合熔盐样品的综合性能最优，其储热密度可达734 kJ/kg，导热系数高达0.74 W/(m·K）。综合考虑不同热物性参数的测试结果，相比传统Solar Salt及Hitec熔盐，本文开发的混合熔盐配方综合性能有较大提升，在光热发电中作为传热蓄热介质具有良好的应用前景。

关键词: 光热发电, 熔盐, 传热蓄热介质, 热物性

Abstract:

Five mixed nitrate molten salts were prepared via the addition of either Additive A or Additive B into the binary formula, i.e. 47% Ca(NO₃)₂-53% KNO₃, and the thermophysical properties were measured. The results indicated that the working temperature range of the mixed molten salts was extended compared to solar salt, with the lowest freezing point at 135.2 ℃ and the highest decomposition temperature at 639.1 ℃. The optimum formula containing 34% Additive B demonstrates a thermal energy density and a thermal conductivity as high as 734 kJ/kg and 0.74 W/(m·K), respectively. A comprehensive analysis of the various thermophysical properties of mixed molten salts indicate that compared to traditional solar salt and Hitec salt, the developed salts demonstrate superior performance and are good candidates for application as a heat transfer and storage medium in concentrating solar power technologies.

Key words: concentrating solar power, molten salt, heat transfer and storage medium, thermophysical property

中图分类号:

TQ 11

盛鹏, 徐丽, 赵广耀, 韩燕, 吴玉庭. 新型混合硝酸熔盐的制备及热物性研究[J]. 储能科学与技术, 2021, 10(1): 170-176.

Peng SHENG, LI XU, Guangyao ZHAO, Yan HAN, Yuting WU. Preparation and thermophysical properties of novel mixed nitrate molten salts[J]. Energy Storage Science and Technology, 2021, 10(1): 170-176.

图/表 1

参考文献 17

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新型混合硝酸熔盐的制备及热物性研究

Preparation and thermophysical properties of novel mixed nitrate molten salts

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