Manufacturing of uniformly-sized silicon particles for solar cell from molten metal jet by electromagnetic pinch force
Shimasaki, S., Imanishi, K., Taniguchi, S. and Bojarevics, Valdis (2009) Manufacturing of uniformly-sized silicon particles for solar cell from molten metal jet by electromagnetic pinch force. In: 6th International Conference on Electromagnetic Processing of Materials, EPM 2009. Forschungszentrum Dresden-Rossendorf, Dresden, Germany. ISBN Forschungszentrum Dresden-RossendorfFull text not available from this repository.
Spherical silicon solar cells are expected to serve as a technology to reduce silicon usage of photovoltaic (PV) power systems[1, 2, 3]. In order to establish the spherical silicon solar cell, a manufacturing method of uniformly sized silicon particles of 1mm in diameter is required. However, it is difficult to mass-produce the mono-sized silicon particles at low cost by existent processes now.
We proposed a new method to generate liquid metal droplets uniformly by applying electromagnetic pinch force to a
liquid metal jet. The electromagnetic force was intermittently applied to the liquid metal jet issued from a nozzle in order to fluctuate the surface of the jet. As the fluctuation grew, the liquid jet was broken up into small droplets according to a frequency of the intermittent electromagnetic force.
Firstly, a preliminary experiment was carried out. A single pulse current was applied instantaneously to a single turn
coil around a molten gallium jet. It was confirmed that the jet could be split up by pinch force generated by the current. And then, electromagnetic pinch force was applied intermittently to the jet. It was found that the jet was broken up into mono-sized droplets in the case of a force frequency was equal to a critical frequency, which corresponds to a natural disturbance wave length of the jet. Numerical simulations of the droplet generation from the liquid jet were then carried out, which consisted of an electromagnetic analysis and a fluid flow calculation with a free surface of the jet. The simulation results were compared with the experiments and the agreement between the two was quite good.
|Item Type:||Book Section|
|Additional Information:||This poster session paper forms part of the Proceedings of the 6th International Conference on Electromagnetic Processing of Materials, EPM2009, held 19-23 October 2009, in Dresden, Germany. EPM2009 was jointly coordinated by the Institute of Safety Research of the Forschungszentrum Dresden-Rossendorf (FZD), Germany and SIMaP/EPM Grenoble, France.|
|Uncontrolled Keywords:||photovoltaic (PV) power systems, silicon, solar cells, manufacturing method, electromagnetic pinch force, numerical simulation model|
|Subjects:||T Technology > TS Manufactures|
T Technology > TN Mining engineering. Metallurgy
Q Science > QA Mathematics
|Last Modified:||23 Apr 2010 12:04|
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