新型低熔点混合熔盐储热材料的开发

doi:10.19799/j.cnki.2095-4239.2020.0204

储能科学与技术 ›› 2020, Vol. 9 ›› Issue (6): 1755-1759.doi: 10.19799/j.cnki.2095-4239.2020.0204

新型低熔点混合熔盐储热材料的开发

罗海华¹(), 沈强², 林俊光¹, 张艳梅³(), 徐云柯²

^1.浙江浙能技术研究院有限公司，浙江杭州 311100
^2.浙江浙能嘉兴发电有限公司，浙江嘉兴 314000
^3.上海电气集团股份有限公司中央研究院，上海 200070

收稿日期:2020-06-05 修回日期:2020-07-21 出版日期:2020-11-05 发布日期:2020-10-28
通讯作者: 张艳梅 E-mail:chdluo@126.com;zhangym8@shanghai-electric.com
作者简介:罗海华（1983—），男，高级工程师，主要从事综合能源技术研究；E-mail：chdluo@126.com；

Development of new low melting point mixed molten salt heat storage material

Haihua LUO¹(), Qiang SHEN², Junguang LIN¹, Yanmei ZHANG³(), Yunke XU²

^1.Zhejiang Zheneng Technology Research Institute Co. , Ltd. , Hangzhou 311100, Zhejiang, China
^2.Zhejiang Zheneng Jiaxing Power Generation Co. , Ltd. , Jiaxing 314000, Zhejiang, China
^3.Central Research Institute of Shanghai Electric Group Co. , Ltd. , Shanghai 200070, China

Received:2020-06-05 Revised:2020-07-21 Online:2020-11-05 Published:2020-10-28
Contact: Yanmei ZHANG E-mail:chdluo@126.com;zhangym8@shanghai-electric.com

摘要/Abstract

摘要：

硝酸盐作为储热介质具有使用温度高、传热性能好、比热容大等优势，开发新型多元低熔点熔盐储热材料可以解决传统二元盐存在的储能效率低和管道冻堵等问题。本文基于相图热力学计算CALPHAD方法，利用PANDAT软件开展NaNO₃-NaNO₂-KNO₂三元体系相图热力学计算并获得该三元体系的共晶点成分配比，经测试实验结果和理论结果基本一致。在三元共晶点成分配比基础上添加LiNO₃制备了NaNO₃-KNO₂-NaNO₂-LiNO₃四元熔盐，通过实验优化筛选获得四元低熔点熔盐成分配比，其组成为w（NaNO₃）=21.57%，w（KNO₂）=41.27%，w（NaNO₂）=17.16%，w（LiNO₃）=20%，经DSC和TG测试该低熔点熔盐熔点为84.2 ℃，上限使用温度为583.3 ℃，步冷曲线实验测试其固-液相变温度为78.9 ℃。研究结果表明该低熔点熔盐作为储热传热介质可广泛应用于光热发电、工业储热等领域。

关键词: 熔盐, 储热材料, 热物性

Abstract:

As a heat storage medium, nitrate molten salt has the advantage of high use temperature, good heat transfer performance, and large specific heat capacity. The development of a new low-melting point mixed molten salt heat storage material can solve the problems of low energy storage efficiency and pipeline freezing and blocking in binary solar salt. This study accurately predicts that the composition of the ternary eutectic point and the experimental results are basically consistent with the theoretical results based on the CALPHAD method and the results from PANDAT for the phase diagram of the NaNO₃-NaNO₂-KNO₂ ternary system. We add LiNO₃ on the basis of the ternary eutectic point composition ratio and prepare NaNO₃-KNO₂-NaNO₂-LiNO₃ quaternary molten salt. The quaternary low-melting point molten salt composition ratio is obtained through experimental optimization screening, resulting to 21.57% NaNO₃, 41.27% KNO₂, 17.16% NaNO₂, and 20% LiNO₃. The melting point of the low-melting molten salt is 84.2 °C, as obtained from the DSC test. The upper limit of temperature usage is 583.3 °C by the TG test. The step cooling curve test shows a solid-liquid phase transition temperature of 78.9 °C. The results show that the low-melting point molten salt can be widely used as a heat storage and heat transfer medium in CSP and industrial heat storage, among others.

Key words: molten salt, heat storage material, thermal properties

中图分类号:

TK 514

罗海华, 沈强, 林俊光, 张艳梅, 徐云柯. 新型低熔点混合熔盐储热材料的开发[J]. 储能科学与技术, 2020, 9(6): 1755-1759.

Haihua LUO, Qiang SHEN, Junguang LIN, Yanmei ZHANG, Yunke XU. Development of new low melting point mixed molten salt heat storage material[J]. Energy Storage Science and Technology, 2020, 9(6): 1755-1759.

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参考文献 13

1	朱教群, 陈维, 周卫兵, 等. 三元硫酸熔盐的制备及其热稳定性能[J]. 储能科学与技术, 2016, 5(4): 498-502.
	ZHU Jiaoqun, CHEN Wei, ZHOU Weibing, et al. Preparation and thermal stability of a ternary sulfate molten salt[J]. Energy Storage Science and Technology, 2016, 5(4): 498-502.
2	何峰, 李延贤, 姚金煜, 等. 基于相变储热的太阳能多模式采暖系统及应用[J]. 储能科学与技术, 2019, 8(2): 311-318.
	HE Feng, LI Yanxian, YAO Jinli, et al. Solar multi-mode heating system based on latent heat thermal energy storage and its application[J]. Energy Storage Science and Technology, 2019, 8(2): 311-318.
3	程晓敏, 朱石磊, 向佳纬, 等. 利用SiO₂纳米颗粒增强硝酸盐储热材料比热容的实验研究[J]. 储能科学与技术, 2016, 5(4): 492-497.
	CHEN Xiaomin, ZHU Shilei, XIANG Jiawei, et al. Enhancement of specific heat capacity of nitrate salts using SiO₂ nanoparticles[J]. Energy Storage Science and Technology, 2016, 5(4): 492-497.
4	REN Nan, WU Yuting, MA Chongfang, et al. Preparation and thermal properties of quaternary mixed nitrate with low melting point[J]. Solar Energy Materials & Solar Cells, 2014, 127: 6-13.
5	PENG Qiang, YANG Xiaoxi, DING Jing, et al. Design of new molten salt thermal energy storage materials for solar thermal power plant[J]. Applied Energy, 2013, 112: 682-689.
6	WEI Xiaolan, SONG Ming, WANG Weilong, et al. Designand thermal properties of a novel ternary chloride eutectics for high-temperature solar energy storage[J]. Applied Energy, 2015, 156(1): 306-310.
7	赵倩, 王俊勃, 宋宇宽, 等. 熔融盐高储热材料的研究进展[J]. 无机盐工业, 2014, 46(11): 5-8.
	ZHAO Qian, WANG Junbo, SONG Yukuan, et al. Research progress in high heat storage material of molten salt[J]. Inorganic Chemicals Industry, 2014, 46(11): 5-8.
8	WANG T, MANTHA D, REDDY R G. Novel low melting point quaternary eutectic system for solar thermal energy storage[J].Applied Energy, 2013, 102: 1422-1429.
9	WEI X, SONG M, WANG W, et al. Design and thermal properties of anovel ternary chloride eutectics for high-temperature solar energy storage[J]. Applied Energy, 2015, 156(1): 306-310.
10	MANTHA D, WANG T, REDDY RG. Thermodynamic modeling of eutectic point in the LiNO₃-NaNO₃-KNO₃-NaNO₂ quaternary system[J]. Solar Energy Materials and Solar Cells, 2013, 118: 18-21.
11	李想. 多元熔盐储能材料的相图热力学计算及热物性研究[D]. 上海: 中国科学院上海应用物理研究所, 2019.
	LI Xiang. Study on phase diagram thermodynamic and thermal-physical properties of thermal energy storage materials of multicomponent molten salt[D]. Shanghai: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 2019.
12	SAUNDERS N, MIODOWNIK A P. CALPHAD (Calculation of phase diagrams): A comprehensive guide[M]. Amsterdam:Elsevier Science Ltd, 1998.
13	闫全英, 孙相宇, 王立娟, 等. 三元碳酸盐混合物的制备及热物性研究[J]. 化工新型材料, 2017, 45(9): 190-192.
	YAN Quanying, SUN Xiangyu, WANG Lijuan, et al. Research on preparation and thermal property of high temperature carbonate molten salt[J]. New Chemical Materials, 2017, 45(9): 190-192.

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新型低熔点混合熔盐储热材料的开发

Development of new low melting point mixed molten salt heat storage material

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