纳米TiO2增强NaNO3-KNO3-NaNO2熔盐的中温储热特性

王义豪; 许茜; 唐忠锋; 张鹏; 安学会; 阴慧琴; 李想

doi:10.11889/j.0253-3219.2018.hjs.41.060603

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纳米TiO₂增强NaNO₃-KNO₃-NaNO₂熔盐的中温储热特性

核能科学与工程 | 更新时间：2021-05-19

- 纳米TiO₂增强NaNO₃-KNO₃-NaNO₂熔盐的中温储热特性
- Heat storage characteristics of NaNO₃-KNO₃-NaNO₂ ternary molten salt enhanced by nano-TiO₂ at medium temperature
- 核技术 2018年41卷第6期文章编号：060603
- 作者机构：
  
  1.上海大学材料科学与工程学院上海 200072
  2.中国科学院上海应用物理研究所嘉定园区上海 201800
- 作者简介：
  
  [ "王义豪, 男, 1992年出生, 2015年毕业于湖北科技学院, 现为硕士研究生, 研究领域为熔盐传蓄热技术", "WANG Yihao, male, born in 1992, graduated from Hubei University of Science and Technology in 2015, master student, focusing on thermos-physical property of molten salt" ]
  许茜, E-mail:qianxu@shu.edu.cn XU Qian, E-mail: qianxu@shu.edu.cn
  唐忠锋, E-mail:tangzhongfeng@sinap.ac.cn TANG Zhongfeng, E-mail:tangzhongfeng@sinap.ac.cn
- 基金信息：
  
  中国科学院战略性先导科技专项(XDA02002400);国家自然科学基金(11505268);国家自然科学基金(21406256);上海市自然科学基金(15ZR1448600);青海省重大科技专项(2017-GX-A3)
- DOI：10.11889/j.0253-3219.2018.hjs.41.060603
  中图分类号： TL99
- 收稿日期：2017-11-20，
  
  修回日期：2018-01-19，
  
  纸质出版日期：2018-06-10
- 稿件说明：
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王义豪, 许茜, 唐忠锋, 等. 纳米TiO₂增强NaNO₃-KNO₃-NaNO₂熔盐的中温储热特性[J]. 核技术, 2018,41(6):060603

Yihao WANG, Qian XU, Zhongfeng TANG, et al. Heat storage characteristics of NaNO₃-KNO₃-NaNO₂ ternary molten salt enhanced by nano-TiO₂ at medium temperature[J]. Nuclear techniques, 2018, 41(6): 060603
王义豪, 许茜, 唐忠锋, 等. 纳米TiO₂增强NaNO₃-KNO₃-NaNO₂熔盐的中温储热特性[J]. 核技术, 2018,41(6):060603 DOI： 10.11889/j.0253-3219.2018.hjs.41.060603.

Yihao WANG, Qian XU, Zhongfeng TANG, et al. Heat storage characteristics of NaNO₃-KNO₃-NaNO₂ ternary molten salt enhanced by nano-TiO₂ at medium temperature[J]. Nuclear techniques, 2018, 41(6): 060603 DOI： 10.11889/j.0253-3219.2018.hjs.41.060603.

摘要

NaNO

-KNO

-NaNO

（Hitec）熔盐作为一种理想的中高温传储热介质，未来有望在太阳能热利用等领域展开广泛应用。但其作为中温储热介质而言，其比热和导热性能相对较低，若能提高其比热和导热系数无疑将在太阳能热利用等实际应用中具有很重要的意义。采用水法技术制备了纳米TiO

/Hitec熔盐复合储热介质，采用不同的表征技术研究了不同粒径、不同添加量纳米TiO

颗粒对复合储热介质的比热、导热系数和热稳定性的影响。结果表明：与Hitec熔盐相比，纳米TiO

颗粒明显提高了熔盐复合储热介质的储热特性。其中25 nm粒径，添加质量分数为0.062 5%纳米TiO

对Hitec熔盐复合储热介质的比热（提高12%）和导热系数（增大15%）增强显著，同时热稳定性也得到改善。

Abstract

Background

NaNO

-KNO

-NaNO

(7%-53%-40% in mass fraction) Hitec molten salt is considered as one of the promising candidate materials for heat transfer and thermal storage media in concentrated solar power (CSP)

due to wide work temperature

low vapor pressure and so on. However

the specific thermal capacity of molten salt is relatively low. It will be significant in practical applications by improving the species thermal capacity with some addition into molten salt.

Purpose

The study aims to investigate the effect of various size (25 nm

40 nm and 100 nm) and addition amount (0.062 5%

0.5% and 1% in mass fraction) of TiO

nanoparticle on the thermal storage properties of Hitec molten salt.

Methods

Differential scanning calorimetry

thermal gravity and laser flash analyzer were used to determine the effect of TiO

nanoparticle on the species heat capacity

thermal stability and thermal conductivity of Hitec.

Results & Conclusion

The TiO

nanoparticle improves the thermal storage properties of Hitec

compared to origin Hitec. Furthermore

0.062 5% (mass fraction) addition of TiO

nanoparticle with 25 nm size showed the best enhancement of the thermal storage properties of Hitec

where the specific heat capacity and thermal conductivity increased by 12% and 15%

respectively. Moreover

the upper working temperature of NaNO

-KNO

-NaNO

increased a lot.

关键词

Keywords

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