用于储热新型低熔点二元无机盐特性研究

doi:10.11962/1006-4990.2019-0504

Abstract

Abstract:

Through the analysis of the thermal properties of molten salt,a new type of low-melting molten salt for heat storage was researched and many problems such as environmental pollution caused by traditional coal-fired heating could be solved effectively by the molten salt.Molten salt materials have become a research hotspot combined with new energy due to their high stability at low temperature,low cost and good electrical conductivity etc..Since the commonly used binary mixed molten salt has a melting point of about 221 ℃,and the heating system has a low heat transfer medium temperature,the high melting point molten salt is not suitable for the heating system,so the development of a molten salt having a lower melting point for the heating system has become a research hot spot.A new type of molten salt with a lower melting point was developed by adjusting the molten salt mixture ratio by test method,and the effectiveness was verified by the application in the large temperature difference energy storage heating system.

Key words: inorganic molten salt, new energy, energy storage, large temperature difference, heating method

CLC Number:

TB34

Du Zhiqiang,Yao Guangyuan. Study on characteristics of novel low-melting binary inorganic salts for heat storage[J]. Inorganic Chemicals Industry, 2020, 52(1): 63-67.

Figures/Tables 14

References 16

[1]	郑天新, 梁精龙, 李慧 , 等. 熔盐技术在新能源中的应用现状[J]. 无机盐工业, 2018,50(3):11-15.
[2]	闫全英, 刘超 . 二元混合氯化盐的配制及热物性研究[J]. 无机盐工业, 2019,51(6):25-28.
[3]	胡宝华, 丁静, 魏小兰 , 等. 高温熔盐的热物性测试及热稳定性分析[J]. 无机盐工业, 2010,42(1):22-24.
[4]	吴鸣, 梁国强 . 储热技术在太阳能工程领域的应用研究[J]. 节能与环保, 2016,34(11):60-62.
[5]	Hallquist M, Wenger J C, Baltensperger U , et al. The formation,properties and impact of secondary organic aero-sol:current and emerging issues[J]. Atmos.Chem.Phys., 2009,9(14):5155-5236.
[6]	吴玉庭, 朱建坤, 张丽娜 , 等. 高温熔盐的制备及实验研究[J]. 北京工业大学学报, 2007,33(1):62-66.
[7]	孙德强, 张涵奇, 卢玉峰 , 等. 我国天然气供需现状、存在问题及政策建议[J]. 研究与探讨, 2018,40(3):41-43,47.
[8]	鞠文杰, 王志梁, 梁慧媛 , 等. 电采暖技术在山东省的应用及效益分析[J]. 电力需求侧管理, 2018,20(2):41-43.
[9]	何军 . 熔盐储能技术的研究及熔盐供暖技术的应用前景[J]. 节能, 2019(3):123-124.
[10]	姚俊彬, 赵峥峥 . 单罐熔盐蓄热供暖系统研究及其应用[J]. 西部皮革, 2017,18(2):18-20.
[11]	姚吉, 杜志强 . 电热辅助型单罐熔盐蓄热集中供暖系统的应用[J]. 暖通空调, 2019,49(7):111-114.
[12]	陈玉和 . 储能技术发展概况研究[J]. 能源研究与信息, 2012,28(3):147-152.
[13]	侯德席, 张健, 王曼莉 . 蓄热式电供暖技术经济性分析[J]. 煤气与热力, 2010,30(10):21-23.
[14]	GB 50736—2012 民用建筑供暖通风与空气调节设计规范[S].
[15]	彭强, 丁静, 魏小兰 , 等. 硝酸熔盐体系在能源利用中的研究进展[J]. 现代化工, 2009,29(6):17-22.
[16]	李平阳 . 溴化锂制冷技术在低温热回收利用中的应用[J]. 中外能源, 2010,15(2):96-99.

样品	熔点/ ℃	峰值点/ ℃	终止点/ ℃	初晶点/ ℃	熔化潜热/ （J·g^-1）	分解温度/℃
1	113.0	164.3	171.5	153.2	28.8	551.5
2	118.8	163.5	174.6	152.2	28.4	569.7
3	111.7	164.2	173.1	146.3	32.8	552.7
4	122.4	165.0	174.9	146.1	30.0	569.1
5	119.5	165.1	173.7	147.3	31.3	559.5
6	116.0	162.9	173.4	151.2	28.4	563.9
平均值	116.9	164.2	173.5	149.4	30.0	561.1

样品	比热/[ J·（g·℃）^-1]
样品	180 ℃	200 ℃	250 ℃	300 ℃	350 ℃	400 ℃	450 ℃	500 ℃
1	1.401 5	1.414 5	1.423 1	1.458 0	1.487 8	1.515 4	1.538 6	1.562 3
2	1.392 7	1.422 6	1.445 4	1.467 1	1.498 0	1.516 9	1.542 9	1.561 1
3	1.393 1	1.409 5	1.440 5	1.475 5	1.490 7	1.503 2	1.524 9	1.572 6
4	1.394 2	1.417 8	1.428 6	1.462 3	1.486 5	1.506 0	1.534 4	1.560 2
5	1.388 8	1.421 1	1.456 7	1.458 7	1.489 6	1.514 9	1.544 2	1.558 2
6	1.391 9	1.414 3	1.450 6	1.468 5	1.482 1	1.523 6	1.539 7	1.556 0
平均值	1.393 7	1.416 6	1.440 8	1.465 0	1.489 1	1.513 3	1.537 5	1.561 7

样品	密度/（g·mL^-1）
样品	200 ℃	250 ℃	300 ℃	350 ℃	400 ℃	450 ℃	500 ℃
1	2.060 1	2.015 5	1.986 9	1.942 3	1.917 7	1.881 9	1.845 6
2	2.051 3	2.026 9	1.965 6	1.954 8	1.921 8	1.881 1	1.852 9
3	2.049 8	2.012 6	2.009 8	1.942 1	1.912 5	1.892 5	1.859 4
4	2.044 6	2.027 4	1.995 2	1.940 8	1.911 9	1.872 1	1.835 1
5	2.061 2	2.018 5	1.994 3	1.964 8	1.920 9	1.880 8	1.857 6
6	2.056 3	2.016 5	1.960 2	1.961 4	1.915 1	1.886 3	1.838 7
平均值	2.053 9	2.019 6	1.985 3	1.951 0	1.916 7	1.882 5	1.848 2

样品	热扩散系数/（mm²·s^-1）
样品	200 ℃	250 ℃	300 ℃	350 ℃	400 ℃	450 ℃
1	0.178 2	0.184 5	0.193 8	0.202 8	0.211 3	0.181 2
2	0.178 3	0.185 6	0.193 1	0.201 9	0.209 7	0.180 7
3	0.181 4	0.185 2	0.194 5	0.201 3	0.212 4	0.182 9
4	0.179 1	0.190 4	0.192 2	0.202 5	0.210 8	0.181 3
5	0.179 1	0.187 1	0.192 8	0.202 1	0.211 0	0.183 5
6	0.180 5	0.184 7	0.192 6	0.203 0	0.213 8	0.180 6
平均值	0.179 4	0.186 3	0.193 2	0.202 3	0.211 5	0.181 7

样品	导热系数/[W·（m·℃）^-1]
样品	200 ℃	250 ℃	300 ℃	350 ℃	400 ℃	450 ℃
1	0.551 2	0.570 7	0.599 5	0.627 3	0.653 6	0.560 5
2	0.551 5	0.574 1	0.597 3	0.624 5	0.648 7	0.559 0
3	0.561 1	0.572 9	0.601 6	0.622 7	0.657 0	0.565 8
4	0.554 0	0.589 0	0.594 5	0.626 4	0.652 1	0.560 8
5	0.554 0	0.578 7	0.596 4	0.625 1	0.652 7	0.567 6
6	0.558 3	0.571 3	0.595 8	0.627 9	0.661 3	0.558 6
平均值	0.555 0	0.576 1	0.597 5	0.625 7	0.654 2	0.562 0

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Study on characteristics of novel low-melting binary inorganic salts for heat storage

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 14

References 16

Related Articles 4

Metrics

Comments

Recommended 10

项目	储能介质/ t	储罐体积/ m³	加热循环泵功率/kW	放热循环泵功率/kW
大温差换热机组系统	385	403	17	4.4
无大温差换热机组系统	471	492	21	5.6
性能提升/%	18.3	18.1	19.1	21.4

[1]	Wang Xiaofeng,Sun Xiaohong. Development status and prospect of China inorganic salts industry [J]. Inorganic Chemicals Industry, 2020, 52(4): 1-6.
[2]	XU Chun-He, ZHANG Hua, XU Wang-Sheng- . Study on preparation of nano-sized zirconia by heating of alcohol-aqueous salt solutions [J]. INORGANICCHEMICALSINDUSTRY, 2012, 44(3): 57-.
[3]	Zhang Tao;Zeng Liang;Zhang Dong. Improvement of thermal properties of hybrid inorganic salt phase change materials by expanded graphite and graphene [J]. INORGANICCHEMICALSINDUSTRY, 2010, 0(5): 0-0.
[4]	Zhang Tao;Zhang Dong. Application and study progress of inorganic salt high temperature phase change energy storage materials [J]. INORGANICCHEMICALSINDUSTRY, 2008, 0(4): 0-0.

样品	黏度/（mPa·s）
样品	200 ℃	250 ℃	300 ℃	350 ℃	400 ℃	450 ℃	500 ℃
1	5.184 3	4.496 5	3.901 7	3.258 1	3.018 7	2.865 1	2.494 3
2	5.185 4	4.504 1	3.914 8	3.256 9	2.989 2	2.864 8	2.493 5
3	5.191 1	4.480 9	3.951 5	3.242 5	2.954 3	2.861 1	2.496 8
4	5.190 2	4.436 2	3.854 2	3.248 2	3.017 1	2.863 4	2.497 9
5	5.182 6	4.473 7	3.923 7	3.276 4	3.013 9	2.871 9	2.494 2
6	5.184 3	4.495 5	3.856 3	3.258 9	3.014 8	2.866 2	2.493 7
平均值	5.186 3	4.481 2	3.900 4	3.256 8	3.001 3	2.865 4	2.495 1