11th World Congress on Industrial Process Tomography
Normalized Resistance Measurement of Molten Salt During Crystallization Process by 3D Electrical Resistance Spectroscopy (3D-ERS)
Alief Avicenna Luthfie1,2, So Segawa3, Yosephus Ardean Kurnianto Prayitno1,4,*, Noritaka Saito5, Masahiro Takei1
1 Department of Mechanical Engineering, Chiba University, Chiba, Japan
2 Department of Mechanical Engineering, Universitas Mercu Buana, Jakarta, Indonesia
3 Division of Mechanical Engineering, Chiba University, Chiba, Japan
4 Department of Mechanical Engineering, Universitas Gadjah Mada, Yogyakarta, Indonesia
5 Department of Materials, Kyushu University, Fukuoka, Japan
*Email: yosephus.ardean@ugm.ac.id
ABSTRACT
Normalized resistance ExpR of molten salt during crystallization process inside a crucible has been measured by 3D electrical resistance spectroscopy (3D-ERS) under high temperature condition. In 3D-ERS, the R of 2D planar was measured in three different heights (z=15 mm, 10 mm, and 5 mm from the bottom of the crucible) in order to get the influence of height to the ExpR during crystallization process. In measuring ExpR, melt-resistive sensor consists of two electrodes in each height was utilized. The electrodes are made of platinum-rhodium alloy and covered by aluminium oxide (Al2O¬¬3). The (_ ^Exp)R measurement was performed under three constant frequencies of f=100 Hz, 10 kHz, 20 kHz. As the results, the ExpR slightly increased at the beginning of molten salt crystallization. Then, the R rapidly increased once solid phase emerged. The solid phase emerged earlier at z=15 mm, followed by z=10 mm and z=5 mm. Furthermore, the ExpR slightly higher at f=100 Hz than at f=10 kHz and 20 kHz before solid phase emerged. After solid phase emerged, the ExpR is independent to frequency difference. In addition, the phase change enthalpy porosity (PCEP) model was utilized in order to provide contour visualization of molten salt during crystallization process.
Keywords: Normalized resistance, molten salt, crystallization process, 3D electrical resistance spectroscopy (3D-ERS), phase change enthalpy porosity (PCEP) model
Industrial Application: Latent Heat Storage (LHS)
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