| 研究実績の概要 |
To develop a lab scale thermochemical reactor/storage system and analyze thermal performance of the moving/packed bed of iron-manganese oxide particles, Fe/Mn particles with different molar ratios (2:1) and (1:3) have been synthesized. The synthesized materials were characterized by X-ray diffraction. Thermogravimetric analyzer (TGA) was used to study the reaction kinetics. Then, to obtain detailed heat transfer characteristics between the bed and heat transfer fluid to analyze reaction rate and apply shrinking core model, an 1D numerical model has been developed. Temperature distribution from the core to the outer surface of the particle and heat transfer rate have been analyzed for various operating conditions. Moreover, a kinetic analysis of the charging mode has been conducted at different heating rates to derive the kinetic equation and describe the reaction mechanism by determining the appropriate reaction model. The activation energy of iron-manganese oxide has been obtained using four isoconversion methods(KAS, OFW, Starink, Friedman) and Arrhenius plots. Furthermore, using the optimized numerical model, an upscaled receiver has been designed for solar demonstration
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