Ice thermal energy storage enhancement using aligned carbon nanotubes under external magnetic field
Ice thermal energy storage enhancement using aligned carbon nanotubes under external magnetic field
复制标题
外部磁场下定向碳纳米管增强冰热能储存
DOI：
10.1016/j.est.2022.105931
复制
发表时间：
2022-12
影响因子：
9.4
通讯作者：
Ruixiang Wang
中科院分区：
文献类型：
--
作者：
Meibo Xing;Dongliang Jing;Hongbing Chen;Hongfa Zhang;Ruixiang Wang
本工作制备了磁化强度为27.6-55.6×emu/g的磁性多壁碳纳米管(MWCNTs)。结果表明，取向的多壁碳纳米管沿磁场方向分布，可以充分利用其在轴向的超高导热系数。此外，还研究了磁场对定向多壁碳纳米管冰蓄能性能的影响。具体地，对不同磁场强度下的凝固特性，包括形核和凝固相变过程进行了实验和理论研究。结果表明，取向多壁碳纳米管相变材料(PCM)存在一个最佳磁场强度，在该磁场强度下，PCM具有最低的过冷度，最短的凝固相变时间，并通过生长的固液界面吞噬多壁碳纳米管。最佳磁场强度分别为150mT、100mT、75mT、75mT，MWCNTs壁上Fe3O4的质量比由1：1增加到4：1，其过冷度分别比纯水降低了36.0%、46.5%、70.0%、65.1%。结果表明，在凝固相变过程中，近50%的定向MWCNTs相变相变材料在25%的凝固时间内固化。结果表明，在最佳磁场强度下，取向的多壁碳纳米管在相变材料中均匀分布，充分发挥了成核作用和强化换热的作用。
In this work, the magnetic Multi-walled Carbon Nanotubes (MWCNTs) with the magnetization range of 27.6–55.6 emu/g were prepared. It is indicated the aligned MWCNTs are distributed along with the magnetic field direction, and their ultra-high thermal conductivity at the axial direction could be fully utilized. Furthermore, the effect of magnetic field on ice thermal energy storage using aligned MWCNTs was studied. Specifically, the solidification characteristics including nucleation and solidification phase change process under various magnetic field intensities were investigated experimentally and theoretically. The results showed the optimal magnetic field intensity exists for aligned MWCNTs Phase Change Material (PCM), at which PCM has the lowest supercooling degree, the shortest solidification phase change time, and phagocytosed MWCNTs by growing solid-liquid interface. The optimal magnetic field intensities are 150 mT, 100 mT, 75 mT, 75 mT with increased mass ratios of Fe3O4on the wall of MWCNTs from 1:1 to 4:1, and their supercooling degree are decreased by 36.0 %, 46.5 %, 70.0 %, 65.1 % compared with pure water. For solidification phase change process, the results showed that nearly 50 % of the aligned MWCNTs PCM is solidified in 25 % of the total solidification time. It is concluded aligned MWCNTs fully exhibited nucleating agent and the heat transfer enhancement as they uniformly distributed in the PCM under optimal magnetic field intensity.
登录
查看更多内容
DOI：
10.1080/1536383x.2021.1879056
发表时间：
2021-02
期刊：
Fullerenes, Nanotubes and Carbon Nanostructures
影响因子：
--
作者：
V. Kumaresan;K. S. Raghavan;M. Vikram;J. Iyyappan
通讯作者：
V. Kumaresan;K. S. Raghavan;M. Vikram;J. Iyyappan
影响因子：
15.9
作者：
Jin Wang;Yanxin Li;Dan Zheng;H. Mikulčić;M. Vujanovic;B. Sundén
通讯作者：
Jin Wang;Yanxin Li;Dan Zheng;H. Mikulčić;M. Vujanovic;B. Sundén
影响因子：
6.4
作者：
Zhenxing Han;C. Wickramaratne;D. Yogi Goswami;C. Jotshi
通讯作者：
Zhenxing Han;C. Wickramaratne;D. Yogi Goswami;C. Jotshi
DOI：
10.1016/0956-7151(91)90065-9
发表时间：
1991-11
期刊：
Acta Metallurgica Et Materialia
影响因子：
--
作者：
R. Sasikumar;M. Kumar
通讯作者：
R. Sasikumar;M. Kumar
影响因子：
4.4
作者：
J. Basha;Montaha Al Balushi;M. Soudagar;M. Safaei;M. Mujtaba;T. Khan;Nazia Hossain;A. Elfasakhany
通讯作者：
J. Basha;Montaha Al Balushi;M. Soudagar;M. Safaei;M. Mujtaba;T. Khan;Nazia Hossain;A. Elfasakhany