Study on thermal conductivity of paraffin-expanded graphite composite phase change materials

被引：0
|
作者：
Lin K. [1 ]
Xu X. [1 ]
Li Q. [1 ]
Hu D. [1 ]
机构：
[1] School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing
来源：
Huagong Xuebao/CIESC Journal | 2021年 / 72卷 / 08期
关键词：
Composite phase change materials; Expanded graphite; Heat transfer; Paraffin; Phase change;
D O I：
10.11949/0438-1157.20201769
中图分类号：
学科分类号：
摘要：
It is a common method to improve the thermal conductivity of paraffin-based phase change materials that adding expanded graphite (EG) to paraffin (PA). It is valuable for the application of PA-EG composite to predict its thermal conductivity accurately. Through the analysis of the microstructure characteristics of PA-EG composite phase change materials with EG mass fraction less than 20%, a micro model based on the uniform dispersion of EG fibers in PA was established, the phase change process of uniformly dispersed structural units was numerically simulated, the influence of EG mass fraction and its particle size on the equivalent thermal conductivity of uniform dispersion unit was analyzed, and a prediction model was proposed for the thermal conductivity of the PA-EG phase change materials suitable for different preparation methods. The experimental results of PA-EG composite phase change materials with EG mass fraction less than 20% are in good agreement, with the maximum error of 15.1%. © 2021, Chemical Industry Press Co., Ltd. All right reserved.
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页码：4425 / 4432
页数：7
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共 36 条
  • [1] Li X., Design and test of a thermal energy storage device in missile electronics, Electro-Mechanical Engineering, 34, 2, pp. 13-16, (2018)
  • [2] Tomizawa Y, Sasaki K, Kuroda A, Et al., Experimental and numerical study on phase change material (PCM) for thermal management of mobile devices, Applied Thermal Engineering, 98, pp. 320-329, (2016)
  • [3] Sun S B, Yao H, Liu C P, Et al., Characteristics analysis of the phase change thermal storage equipment for medium and low temperature flue gas from steel industry, Energy Storage Science and Technology, 9, 3, pp. 730-734, (2020)
  • [4] Elefsiniotis A, Becker T, Schmid U., Thermoelectric energy harvesting using phase change materials (PCMs) in high temperature environments in aircraft, Journal of Electronic Materials, 43, 6, pp. 1809-1814, (2014)
  • [5] Zhang W., Research on heat storage and release performance of phase change heat storage and heating device based on spherical package, (2020)
  • [6] Li Z Y, Fu X Y, Pan D, Et al., Research on thermal storage performance of solar phase change thermal storage integrated device, Procedia Engineering, 205, pp. 1357-1363, (2017)
  • [7] Sun W C, Feng J X, Zhang Z G, Et al., Research progress of phase change heat storage technology for passive energy conservation in buildings, Chemical Industry and Engineering Progress, 39, 5, pp. 1824-1834, (2020)
  • [8] Wang Z H, Wang F H, Ma Z J, Et al., Performance evaluation of a novel frost-free air-source heat pump integrated with phase change materials (PCMs) and dehumidification, Energy Procedia, 121, pp. 134-141, (2017)
  • [9] Zhou H L., Melting and solidification heat transfer characteristics of paraffin in rectangular unit and structure optimization, (2020)
  • [10] Liu Z H, Zhang X S, Wang C L, Et al., Experimental study on melting performance of paraffin and paraffin/expanded graphite, CIESC Journal, 71, 7, pp. 3362-3371, (2020)
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