Thermal diffusivity and adiabatic limit temperature characterization of consolidate granular expanded perlite using the flash method

2nd International Conference on Energy Materials and Applications

材料科学;能源学

Raefat, Saad^1 ; Garoum, Mohammed^1 ; Laaroussi, Najma^1 ; Thiam, Macodou^2 ; Amarray, Khaoula^1

Materials Energy and Acoustics TEAM, Higher School of Technology Salé, Mohammed v University in Rabat, 227 Avenue Prince Héritier, 11060, Morocco^1

University Institute of Technology of the University of Thiès, Senegal^2

关键词: Characteristic grain;    Estimated parameter;    Expanded perlite;    Experimental investigations;    Global minimization;    Inverse estimation;    Temperature characterization;    Temperature rise;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/222/1/012004/pdf
DOI  :  10.1088/1757-899X/222/1/012004

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this work experimental investigation of apparent thermal diffusivity and adiabatic limit temperature of expanded granular perlite mixes has been made using the flash technic. Perlite granulates were sieved to produce essentially three characteristic grain sizes. The consolidated samples were manufactured by mixing controlled proportions of the plaster and water. The effect of the particle size on the diffusivity was examined. The inverse estimation of the diffusivity and the adiabatic limit temperature at the rear face as well as the heat losses coefficients were performed using several numerical global minimization procedures. The function to be minimized is the quadratic distance between the experimental temperature rise at the rear face and the analytical model derived from the one dimension heat conduction. It is shown that, for all granulometry tested, the estimated parameters lead to a good agreement between the mathematical model and experimental data.