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Design and fabrication of cylindrical ceramic crucible as insulator for energy storage systems

Ndubuisi, A. O. and Ogunrinola, I. E. and Aizebeokhai, A. P. and Sanni, Samuel Eshorame and Boyo, H.O. (2021) Design and fabrication of cylindrical ceramic crucible as insulator for energy storage systems. In: International Conference on Energy and Sustainable Environment, 2021, Online.

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The ubiquitous demand for thermal energy in domestic and industrial applications, necessitates the need that heating systems, are effectively insulated, portable and occupy less space. This research focuses on the design and fabrication of a portable crucible for insulating a thermal energy storage system operating at high temperature. The insulating properties of the crucible were also investigated. Two ceramic crucibles, comprising of kaolin, and a mixture of kaolin and sand, were fabricated using the parameters obtained from simulation. When subjected to thermal treatment, the crucible comprising of kaolin and sand structurally failed at 75 ℃. However, the crucible comprising of only kaolin remained stable and attained steady state at a temperature of 200 ℃. The heating and cooling temperature curves of the kaolin crucibles were plotted and the estimated thermal conductivity of the kaolin crucible was 0.09 W/mK at 200 ℃; this is in good agreement with theoretical values of kaolin which range from 0.03 to 0.3 W/mK. The computed thermal diffusivity is 4.9x10-8 m2/s, which is much lower when compared with the thermal diffusivity of insulating materials like polystyrene, glass fibre and rock wool. Thus, the rate at which heat diffuses through the crucible is low, making it suitable for insulating a thermal energy storage material operating at 800 ℃. The results of this study will facilitate an efficient way of transporting stored thermal energy in portable insulating containers.

Item Type: Conference or Workshop Item (Paper)
Subjects: Q Science > QC Physics
T Technology > TP Chemical technology
Divisions: Faculty of Engineering, Science and Mathematics > School of Physics
Depositing User: Mrs Patricia Nwokealisi
Date Deposited: 12 Apr 2022 15:37
Last Modified: 12 Apr 2022 15:37

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