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Fabrication of Heat Storage Pellets Consisting of a Metallic Latent Heat Storage Microcapsule and an Al2O3 Matrix

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Title: Fabrication of Heat Storage Pellets Consisting of a Metallic Latent Heat Storage Microcapsule and an Al2O3 Matrix
Authors: Sakai, Hiroki Browse this author
Kurniawan, Ade Browse this author
Akiyama, Tomohiro Browse this author
Nomura, Takahiro Browse this author →KAKEN DB
Keywords: steelmaking
high temperature waste heat recovery
phase change material
Issue Date: 15-Oct-2020
Publisher: 一般社団法人 日本鉄鋼協会 (The Iron and Steel Institute of Japan)
Journal Title: ISIJ international
Volume: 60
Issue: 10
Start Page: 2152
End Page: 2156
Publisher DOI: 10.2355/isijinternational.ISIJINT-2019-827
Abstract: Energy efficiency is fundamental in the steel industry. Latent heat storage (LHS) systems with phase change materials (PCM) are attractive technologies for the recovery and utilization of heat, especially for the development of high-temperature thermal energy storage system. This paper describes fabrication of LHS pellets for high-temperature applications using metallic microencapsulated PCM (MEPCM). The LHS pellets consist of Al-Si PCM parts and an Al2O3 matrix. The pellets were fabricated by mixing MEPCM with sinterable alumina. The powder mixture was then pelletized and sintered at different pressures and atmospheric conditions, respectively. Some MEPCM in the pellets remained spherical after being sintered at 1 000 degrees C, a high-temperature condition above the PCM melting temperature. All fabricated pellets exhibited latent heat of PCM at the melting point of the PCM, about 577 degrees C. The maximum value of latent heat was 73.5 J g(-1). This was observed for the LHS pellet pelletized at 20 MPa and sintered under O-2 atmosphere. Therefore, this study presents a great material for high-temperature thermal energy storage systems in the steel industry.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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