Research on heat transfer performance of composite phase change materials based on expanded graphite

被引：0
|
作者：
Wu T. [1 ]
Hu Y. [1 ]
Rong H. [1 ]
Wang C. [1 ]
机构：
[1] School of Materials and Energy, Guangdong University of Technology, Guangzhou
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2021年 / 52卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Composite phase change material; Expanded graphite; Heat transport performance; Visualization;
D O I：
10.11817/j.issn.1672-7207.2021.01.020
中图分类号：
学科分类号：
摘要：
Pure paraffin was used as phase change medium, and expanded graphite was added to reinforce the heat-conducting skeleton. Subsequently, a composite phase change material(CPCM) with excellent thermal conducting property was prepared. A visualized testing platform was set up to analyze the influence of adding material mass fraction on the melting process of composite phase change materials under constant heat flux condition. The difference in heat transfer performance and regularity of the composite phase change material with various mass fractions were investigated. In addition, the evolution of the temperature distributions was visualized by using the infrared thermal imager at specified points during the melting process. The results show that the thermal performance of CPCM can be furtherly enhanced by adding EG-100. When the mass fraction is 5%, the thermal diffusion coefficient of the CPCM based on EG-100 is increased by 42% compared with that of the CPCM based on EG-80. When 2% or 4% heat conduction enhancement material is added, the natural convection inside the material is weakened in the later stage of melting, resulting in a decrease in the overall heat transfer effect. Adding 6% of thermal conductivity enhancement material improves the overall heat transfer performance. As the mass fraction of thermally enhanced materials increases, the heat transfer along the y-direction inside the composite phase change material is basically unaffected, but the thermal stratification along the direction of gravity(z-direction) gradually decreases. © 2021, Central South University Press. All right reserved.
引用
收藏
页码：200 / 209
页数：9
相关论文
共 20 条
  • [11] JIANG Zhao, OUYANG Ting, YANG Yang, Et al., Thermal conductivity enhancement of phase change materials with form-stable carbon bonded carbon fiber network, Materials & Design, 143, pp. 177-184, (2018)
  • [12] WANG Wei, WANG Chongyun, WANG Teng, Et al., Enhancing the thermal conductivity of n-eicosane/silica phase change materials by reduced graphene oxide, Materials Chemistry and Physics, 147, 3, pp. 701-706, (2014)
  • [13] NGO Q, CRUDEN B A, CASSELL A M, Et al., Thermal interface properties of Cu-filled vertically aligned carbon nanofiber arrays, Nano Letters, 4, 12, pp. 2403-2407, (2004)
  • [14] HU Jinyan, Theoretical and experimental research on thermal storage heat sink based on solid-liquid phase change, pp. 48-58, (2017)
  • [15] ZHOU D, ZHAO C Y., Experimental investigations on heat transfer in phase change materials(PCMs) embedded in porous materials, Applied Thermal Engineering, 31, 5, pp. 970-977, (2011)
  • [16] HUXTABLE S T, CAHILL D G, SHENOGIN S, Et al., Interfacial heat flow in carbon nanotube suspensions, Nature Materials, 2, 11, pp. 731-734, (2003)
  • [17] WU Tingting, Shape-stabilized phase change materials based on SEBS for batterie thermal management, pp. 21-25, (2020)
  • [18] WANG Zichen, ZHANG Zhuqian, JIA Li, Et al., Paraffin and paraffin/aluminum foam composite phase change material heat storage experimental study based on thermal management of Li-ion battery, Applied Thermal Engineering, 78, pp. 428-436, (2015)
  • [19] YAO Yuanpeng, WU Huiying, Thermal transport process of metal foam/paraffin composite(MFPC) with solid-liquid phase change: an experimental study, Applied Thermal Engineering, 179, (2020)
  • [20] ZHENG Huanpei, WANG Changhong, LIU Qingming, Et al., Thermal performance of copper foam/paraffin composite phase change material, Energy Conversion and Management, 157, pp. 372-381, (2018)
12