化工进展 ›› 2019, Vol. 38 ›› Issue (03): 1494-1500.DOI: 10.16085/j.issn.1000-6613.2018-0616

• 研究开发 • 上一篇    下一篇

80#石蜡/膨胀石墨定形复合相变材料的特性表征与分析

尹少武1,2(),李鸿坤1,王立1,2,童莉葛1,2,刘传平1,2   

  1. 1. 北京科技大学能源与环境工程学院,北京 100083
    2. 北京科技大学冶金工业节能减排北京市重点实验室,北京 100083
  • 收稿日期:2018-03-26 修回日期:2018-08-17 出版日期:2019-03-05 发布日期:2019-03-05
  • 作者简介:尹少武(1979—),男,副教授,主要研究方向为能量转换、储存与利用。E-mail:yinsw@ustb.edu.cn
  • 基金资助:
    国家重点研发计划(2016YFB0601100);国家自然科学基金(51106008)

Characteristics and analysis of 80# paraffin/expanded graphite composite phase change material

Shaowu YIN1,2(),Hongkun LI1,Li WANG1,2,Lige TONG1,2,Chuanping LIU1,2   

  1. 1. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
    2. Key Laboratory of Energy Saving and Emission Reduction, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2018-03-26 Revised:2018-08-17 Online:2019-03-05 Published:2019-03-05

摘要:

以80#石蜡为相变材料,利用不同粒径膨胀石墨的多孔隙结构,以多层吸附、模压法压制方式制备了80#石蜡/膨胀石墨定形复合相变材料。通过循环融冻实验分析了80#石蜡的热稳定性和循环稳定性,滴定滤纸渗漏实验确定了不同组分复合相变材料的渗漏率。采用差示扫描量热仪(DSC)、扫描电子显微镜(SEM)、Hot Disk热常数分析仪等仪器对所制备复合相变材料的相变潜热、多孔基吸附结构、热导率、渗漏率等特性进行了分析。结果表明:当膨胀石墨的添加质量分数达到整体组分的8%时,复合定形相变材料的相变温度为80.86℃(吸热)和76.08℃(放热),相变潜热为130.12kJ/kg,且渗漏率小于0.3%。制备的复合定形相变材料具有形状稳定、渗漏率低、蓄热密度高的特点,且具有较长的使用寿命。

关键词: 石蜡, 膨胀石墨, 相变, 吸附, 载体

Abstract:

Taking 80# paraffin as the phase change material and expanded graphite with network structure as the framework, we have prepared the 80# paraffin/expanded graphite composite phase change material by using the multi-layer adsorption and pressing die method. The thermal stability and cycle stability of 80# paraffin were analyzed by cyclic thawing experiment. The leakage rate of the composite phase change material with different components was determined through the titration filter paper leakage test. The latent heat, adsorption structure, thermal conductivity and leakage rate of the composite phase change materials were analyzed by using differential scanning calorimeter(DSC), scanning electron microscope(SEM), Hot Disk thermal constant analyzer and other instruments. The results show that when the amount of the added expanded graphite reaches 8% of the total component, the transformation temperature of the composite phase change material is 80.86℃ (endothermic) and 76.08℃ (exothermic), the latent heat is 130.12kJ/kg, and the leakage rate is less than 0.3%. The composite phase change material has the features of stable shape, low leakage rate, high heat storage density, and long life.

Key words: paraffin, expanded graphite, phase change, adsorption, support

中图分类号: 

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