Fabrication and heat storage properties of stearyl alcohol/expanded graphite composite phase change materials

被引：0
|
作者：
Kuai Z. [1 ,2 ]
Yan T. [1 ,2 ]
Wu S. [1 ,2 ]
Zhou Y. [1 ,2 ]
Pan W. [1 ,2 ]
机构：
[1] College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai
[2] Key Laboratory of Clean Power Generation and Environmental Protection Technology in Mechanical Industry, Shanghai
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2021年 / 40卷 / S1期
关键词：
expanded graphite; heat storage capacity; phase change material (PCM); stearyl alcohol; thermal conductivity;
D O I：
10.16085/j.issn.1000-6613.2020-0750
中图分类号：
学科分类号：
摘要：
The technology of phase change heat storage is one of the effective means to solve the heat imbalance in time and space. The development of high-performance composite phase change material (PCM) has become the focus of current researchers. At present, the low thermal conductivity and poor cyclic stability of stearyl alcohol(SAL) and other organic PCM limit their practical application. Herein, SAL was used as PCM and expanded graphite(EG) as porous matrix of high thermal conductivity. Sixteen kinds of SAL/EG composite PCMs (EG content was 7%, 14%, 21%, 28%(mass), sample density was 700kg/m3, 800kg/m3, 900kg/m3, 1000kg/m3) were prepared by adsorption form-stable process. The microstructure, thermal storage capacity, thermal conductivity, cycle stability and heat storage/release properties of the composite PCMs were studied and analyzed. The results show that SAL is completely filled in the porous network of EG. The horizontal thermal conductivity of the sample with sample density of 900kg/m3 and EG content of 28%(mass) is the highest, with a value as high as 28.58W/(m · K), which is 74 times higher than pure SAL[0.38W/(m · K)], which is about 4.8 times of the corresponding vertical thermal conductivity[5.99W/(m·K)]. In addition, the heat storage/release performance at the center of the sample was studied on the heat storage experiment system. The results show that the sample density is 900kg/m3 and the sample with the EG content of 28%(mass) has the maximum heat storage/release rate. The time of latent heat storage and release stages is 53minutes and 20minutes. At the same time, the thermal conductivity and melting-solidification characteristics of the samples are verified, which shows that SAL/EG composite PCMs has stable and reliable heat storage/release performance. © 2021, Chemical Industry Press Co., Ltd.. All rights reserved.
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页码：301 / 310
页数：9
相关论文
共 37 条
  • [1] XIE B., Theoretical and experimental study on energy storage and thermal control of composite phase change materials, (2016)
  • [2] FARAJ K, KHALED M, FARAJ J, Et al., Phase change material thermal energy storage systems for cooling applications in buildings: a review, Renewable and Sustainable Energy Reviews, 119, (2020)
  • [3] LAMIDI R O, JIANG L, PATHARE P B, Et al., Recent advances in sustainable drying of agricultural produce: a review, Applied Energy, 233, 234, pp. 367-385, (2019)
  • [4] SHENG N, RAO Z, ZHU C, Et al., Enhanced thermal performance of phase change material stabilized with textile-structured carbon scaffolds, Solar Energy Materials and Solar Cells, 205, (2020)
  • [5] WENG Y C, CHO P H, CHANG C C, Et al., Heat pipe with PCM for electronic cooling, Applied Energy, 88, pp. 1825-1833, (2011)
  • [6] BEHI H, GHANBARPOUR M, BEHI M., Investigation of PCM-assisted heat pipe for electronic cooling, Applied Thermal Engineering, 127, pp. 1132-1142, (2017)
  • [7] GUO Q L., Preparation and thermal properties of expanded graphite/ erythritol phase change composite, (2015)
  • [8] YU H T., Preparation and application of stearic acid/expanded graphite phase change heat Storage material [D], (2016)
  • [9] ZHAO Y Q., Study on the preparation and shaping effect of shaped phase change materials [D], (2011)
  • [10] MAN Y H., Study on latent heat mechanism of phase change and its application technology, (2010)
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