成核剂对相变材料Ba(OH)2·8H2O储热特性的影响

doi:10.16085/j.issn.1000-6613.2017-1648

化工进展 ›› 2018, Vol. 37 ›› Issue (07): 2727-2733.DOI: 10.16085/j.issn.1000-6613.2017-1648

成核剂对相变材料Ba(OH)₂·8H₂O储热特性的影响

韩兴超, 章学来, 华维三, 袁维烨, 汪翔

上海海事大学蓄冷技术研究所, 上海 201306

收稿日期:2017-08-07 修回日期:2017-10-19 出版日期:2018-07-05 发布日期:2018-07-05
通讯作者: 章学来,教授,研究方向为相变储能技术。
作者简介:韩兴超(1991-),男,硕士研究生。
基金资助:
上海市科委项目（16040501600）及上海海事大学研究生创新基金项目（2017ycx033）。

Influence of nucleating agents on the heat storage characteristics of phase change material Ba(OH)₂·8H₂O

HAN Xingchao, ZHANG Xuelai, HUA Weisan, YUAN Weiye, WANG Xiang

Institute of Cool Storage Technology, Shanghai Maritime University, Shanghai 201306, China

Received:2017-08-07 Revised:2017-10-19 Online:2018-07-05 Published:2018-07-05

摘要/Abstract

摘要： Ba（OH）₂·8H₂O作为一种中低温区间理想的相变材料，具有高潜热、性能稳定的优点，但成核过程中过冷严重。本文基于科学法和爱迪生法，用3种钡盐和3种常用成核剂进行了实验，结果表明，质量分数4%的Ba（OH）₂·H₂O效果最好，可以将过冷减小至1℃以内，其他成核剂减小过冷度效果不稳定或者会增大过冷度。4% Ba（OH）₂·H₂O成核剂的加入对基材Ba（OH）₂·8H₂O的储热性能影响不大，通过DSC测试，潜热为267.7kJ/kg，相变温度为77.9℃。通过100次循环实验，4% Ba（OH）₂·H₂O＋ 96% Ba（OH）₂·8H₂O复合相变材料的相变温度和相变潜热变化很小，最大影响幅度分别为0.63%和3.81%，热物性较为稳定。因此，4% Ba（OH）₂·H₂O可以作为Ba（OH）₂·8H₂O理想的成核剂在工业中应用。

关键词: 水合盐, 复合材料, 相变, 成核, 过冷度

Abstract: Barium hydroxide octahydrate, as a phase change material used in medium-low temperature, is widely used in industries due to its high stability and high latent heat. However, there's serious supercooling during its phase change process. Based on the scientific method and Edison method, experiments for two frequently used kinds of nucleating agents including barium salt and three others were conducted. The addition of 4% of Ba(OH)₂·H₂O as the nucleating agent showed the best supercooling degree of <1℃ with little influence on thermal properties of main material, while other nucleating agents either were not stable or increased the degree of supercooling. The latent heat and the phase change temperature are 267.7kJ/kg and 77.9℃ respectively as determined from the DSC test. After 100 times cyclic experiments, the phase change temperature and phase change latent heat of the composite PCM approximately remained constant, only changed 0.63% and 3.81% respectively, indicating the thermal physical properties are stable. Therefore, 4% Ba(OH)₂·H₂O can be considered as an ideal nucleating agent to be applied in industry.

Key words: hydrous salt, composites, phase change, nucleation, supercooling

中图分类号:

TK02

韩兴超, 章学来, 华维三, 袁维烨, 汪翔. 成核剂对相变材料Ba(OH)₂·8H₂O储热特性的影响[J]. 化工进展, 2018, 37(07): 2727-2733.

HAN Xingchao, ZHANG Xuelai, HUA Weisan, YUAN Weiye, WANG Xiang. Influence of nucleating agents on the heat storage characteristics of phase change material Ba(OH)₂·8H₂O[J]. Chemical Industry and Engineering Progress, 2018, 37(07): 2727-2733.

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成核剂对相变材料Ba(OH)₂·8H₂O储热特性的影响

Influence of nucleating agents on the heat storage characteristics of phase change material Ba(OH)₂·8H₂O

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