储能科学与技术 ›› 2018, Vol. 7 ›› Issue (4): 692-697.doi: 10.12028/j.issn.2095-4239.2018.0072

• 研究及进展 • 上一篇    下一篇

十四烷-正辛酸有机复合相变材料的制备和性能

周孙希1,2, 章学来1, 刘升2   

  1. 1. 上海海事大学蓄冷技术研究所, 上海 201306;
    2. 北京市农林科学院蔬菜研究中心, 北京 100097
  • 收稿日期:2018-05-07 修回日期:2018-05-29 出版日期:2018-07-01 发布日期:2018-07-01
  • 通讯作者: 章学来,教授,研究方向为蓄能技术,E-mail:xlzhang@shmtu.edu.cn
  • 作者简介:周孙希(1994-),男,硕士研究生,研究方向为冷链物流,1373988947@qq.com
  • 基金资助:
    国家自然科学基金项目(51376115),上海市科委项目(16040501600)。

Preparation and thermal property of a tetradecane-octanoic acid eutectic phase change material

ZHOU Sunxi1,2, ZHANG Xuelai1, LIU Sheng2   

  1. 1. Cool Storage Technology Institute, Shanghai Maritime University, Shanghai 201306, China;
    2. Vegetable Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
  • Received:2018-05-07 Revised:2018-05-29 Online:2018-07-01 Published:2018-07-01

摘要: 采用低共熔法研制了一种相变温度在0~3℃的二元有机相变蓄冷材料,该材料由十四烷和正辛酸按一定比例混合组成。首先通过理论计算预测二元最低共熔混合物的比例,确定其理论最低共熔点温度以及潜热值,然后围绕共晶点配制了5种不同比例的混合物。通过差示热量扫描仪、步冷曲线、Hot disk热常数分析仪测量其热物性,并利用高低温交变箱进行循环稳定性实验。当十四烷和正辛酸的摩尔质量比为51:49时,有最低共熔点温度为1.0℃,相变潜热为191.8 J/g,热导率为0.379 W/(m·K)。对其进行100次充放冷实验,循环后相变温度为0.9℃,相变潜热为191.5 J/g,相变蓄冷时间缩短了24.3%,热稳定性良好。实验结果表明,十四烷-正辛酸有机复合相变材料在低温储能中有可观的应用价值。

关键词: 相变材料, 蓄冷, 热物性, 循环稳定性

Abstract: A new binary organic phase change material with a phase change temperature of 0~3℃ was developed. The material was mad by mixing tetradecane and octanoic acid around their eutectic point predicted by a theoretical calculation, which also gave the latent heat. A differential scanning calorimeter, a step cooling curve measurement device, and a hot disk thermal analyzer were used to measure the thermal properties of the formulations. A cyclic thermal testing box was used for understanding the cycle stability of the formulations. The results showed that the eutectic point was 1.0℃ at a molar mass ratio of tetradecane to octanoic acid of 51:49 with a latent heat of 191.8 J·g-1, and a thermal conductivity of 0.3790 W·(m·K)-1. The phase change material was shown to have a good cycle stability:the phase change temperature was 0.9℃ and the latent heat was 191.5 J·g-1, after 100 cycles.

Key words: phase change material, cold storage, thermal properties, cyclic stability

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