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Estimation of Optimal Insulation Thickness for a Cylindrical Ceramic Crucible

Ndubuisi, A. O. and Ogunrinola, I. E. and Aizebeokhai, A. P. and Inegbenebor, A.O. and Boyo, H.O. (2019) Estimation of Optimal Insulation Thickness for a Cylindrical Ceramic Crucible. International Journal of Engineering Research and Technology, 12 (9). pp. 1389-1393. ISSN 0974-3154

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High temperature thermal energy storage (TES) systems have the capacity to achieve high thermal efficiencies due to their high operating temperatures. However, they tend to experience higher thermal losses which adversely affect their thermal cycles. This paper focuses on heat loss estimation from a TES system operating at 800 ℃, insulated in a cylindrical ceramic crucible, and the determination of the optimal insulation thickness of the crucible. Parameters affecting heat loss such as thermal conductivity of the ceramic material and convective heat transfer coefficient were simulated. It was observed that the thermal conductivity of the crucible had a greater effect on the rate of heat loss than the convective heat transfer coefficient. Furthermore, an increase in the length of the crucible increased the thermal mass of the crucible causing it to lose heat at higher rate. The deduced optimal radial thickness for the operating temperature range was 0.075 m. In conclusion, addition of more refractories beyond the optimal radius will not significantly reduce the rate of heat loss and will make the insulating crucible bulkier.

Item Type: Article
Uncontrolled Keywords: Thermal energy storage, heat loss estimation, optimal insulation thickness, cylindrical ceramic crucible
Subjects: Q Science > QC Physics
Divisions: Faculty of Engineering, Science and Mathematics > School of Physics
Depositing User: Mrs Patricia Nwokealisi
Date Deposited: 13 Nov 2020 12:28
Last Modified: 13 Nov 2020 12:28

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