Densities of component salts in low-temperature eutectic region

Qingguo ZHAO; Jianru FENG; Yuting WU; Hang GUO

doi:10.11949/0438-1157.20190596

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Densities of component salts in low-temperature eutectic region

Thermodynamics | 更新时间：2020-06-24

- Densities of component salts in low-temperature eutectic region
- CIESC Journal Vol. 70, Issue S2, Pages: 37-43(2019)
- 作者机构：
  
  北京工业大学环境与能源工程学院，北京 100124
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20190596
  CLC： TK 124
- Received：30 May 2019，
  
  Revised：2019-06-04，
  
  Published：05 September 2019
- 稿件说明：
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赵庆国, 冯建茹, 吴玉庭, 郭航. 混合熔融盐低温共熔区的密度计算[J]. 化工学报, 2019, 70(S2): 37-43

ZHAO Qingguo, FENG Jianru, WU Yuting, GUO Hang. Densities of component salts in low-temperature eutectic region[J]. CIESC Journal, 2019, 70(S2): 37-43
赵庆国, 冯建茹, 吴玉庭, 郭航. 混合熔融盐低温共熔区的密度计算[J]. 化工学报, 2019, 70(S2): 37-43 DOI： 10.11949/0438-1157.20190596.

ZHAO Qingguo, FENG Jianru, WU Yuting, GUO Hang. Densities of component salts in low-temperature eutectic region[J]. CIESC Journal, 2019, 70(S2): 37-43 DOI： 10.11949/0438-1157.20190596.

摘要

通过建立理论模型，计算熔融盐的密度并与实验数据做比较，进行误差分析得出二次多项式模型是最佳的计算方法。混合熔融盐熔点到各组分盐熔点之间的温度区域

称之为“低温共熔区”。其熔融盐是固液共存状态，热物性无法直接测量，必须采用理论研究与实验验证相结合的方法来获取。采用二次多项式模型，利用外插法对混合熔融盐低温共熔区的密度进行计算，得到了全温度范围内的密度并且误差很小，证明此理论计算方法是可行的。在研究混合熔融盐密度时，为了减小误差，实验数据均来自同一文献或者同一研究组。

Abstract

By establishing a theoretical model

the density of the molten salt is calculated and compared with the experimental data. The error analysis shows that the quadratic polynomial model is the best calculation method. Low-temperature eutectic region (LTER) of mixed molten salts is defined as the temperature range between the melting temperature of mixed salts and the highest melting temperature of component salts. The molten salt is a solid-liquid coexistence state in LTER

and the thermal properties cannot be directly measured. It must be obtained by a combination of theoretical research and experimental verification. Using the quadratic polynomial model

the density of the mixed molten salts in LTER is calculated by extrapolation method. The density in the whole temperature range is obtained with little error

which proves that the theoretical calculation method is feasible. In order to reduce the error in the molten salt density

the experimental data are from the same literature or the same research group.

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references

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