Preliminary study on molten silicon velocity distribution during the directional solidification into i-DSS furnaceReport as inadecuate




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1 Laboratory of Electroheat LEP

Abstract : The induction Directional Solidification System i-DSS is a furnace designed to cast solar grade silicon ingots that makes use of induction heating in the Directional Solidification process for the production of multi-crystal silicon. The isostatic graphite, that envelopes the quartz crucible where the silicon is melted, is heated by induction, so in i-DSS the isostatic graphite acts as susceptor.The Alternative Magnetic Field AMF, which frequency and intensity have been chosen in order to maximize the efficiency of the heating, is not completely shielded by the graphite and it affects the flow of silicon fluid. In this paper, the fluid motion is investigated taking into account various position of the solidification front.The study is applied to the lab-scale i-DSS installed at Laboratory of Electroheat LEP of University of Padova.The electromagnetic and fluid problems have been studied by numerical models developed using the commercial FEM code COMSOL Multiphysics.

Keywords : Coupled problems Directional Solidification System Silicon Casting mc-silicon





Author: F Dughiero - M Forzan - N Sempreboni - A Tolomio -

Source: https://hal.archives-ouvertes.fr/



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