論文

査読有り 最終著者 責任著者 国際誌
2020年5月

Fabrication of heat storage pellets composed of microencapsulated phase change material for high-temperature applications

Applied Energy
  • Hiroki Sakai
  • ,
  • Nan Sheng
  • ,
  • Ade Kurniawan
  • ,
  • Tomohiro Akiyama
  • ,
  • Takahiro Nomura

265
開始ページ
114673
終了ページ
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.apenergy.2020.114673
出版者・発行元
Elsevier BV

Latent heat storage using a metallic phase change material (PCM) is an attractive option for high-temperature thermal energy storage. However, there are serious technical barriers to applying a metallic PCM to practical applications, mainly caused by its high corrosivity. This study reports the fabrication of a pellet-type PCM composite, mainly composed of a microencapsulated metallic PCM, as a potentially viable solution to this issue. This microencapsulated PCM (MEPCM) has a core composed of Al-25 mass% Si, which acts as a PCM. Its shell is composed of Al2O3 (or a precursor of Al2O3), and grass frit was used as a sinter agent. The composites were fabricated by mixing the MEPCM with a sintering agent, pelletizing, and sintering. The PCM composites exhibited a melting point of similar to 577 degrees C and a latent heat of 108-122 J g(-1). The thermal conductivities of the PCM composites were in the range of 2.16-3.20 W m(-1) K-1. The cycling performance demonstrated the good durability of the composites. There were no significant changes in the shape and chemical composition of the pellets, even after 300 cycles of melting and freezing tests. These results indicate that the concept of pellet-type composites using MEPCM developed in this study will overcome the technical barriers to utilizing metallic PCMs. Thermal energy storage structures in various shapes could be fabricated via the method for fabricating PCM composites proposed in this study. This concept therefore shows substantial promise for application in high-temperature thermal energy storage systems.

リンク情報
DOI
https://doi.org/10.1016/j.apenergy.2020.114673
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000522639500019&DestApp=WOS_CPL
ID情報
  • DOI : 10.1016/j.apenergy.2020.114673
  • ISSN : 0306-2619
  • eISSN : 1872-9118
  • Web of Science ID : WOS:000522639500019

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