Polycrystalline Silicon Reactors
The viability of cost competitive photovoltaic power for large-scale electric production has been made possible by the use of new fluidized bed reactor technology. Previously, the production of ultra-high-purity silicon could only be done in a slow, batch mode process. However, new two-stage reactor technology has enabled continuous processing with tremendous cost savings, hence enabling wide spread PV usage. Barracuda has been successfully employed for both reactor types: the trichlorosilane (SiHCl3) reactor, and the 'deposition' reactor. In the deposition reactor a gas-phase reaction produces silicon (Si) as a solid - hence the Barracuda chemical reaction model of the fluidized bed causes the silicon particles to grow in size. The reactor is often a spouted bed design and Barracuda can therefore capture all of the important physics of gas-solids fluidization, mixing from side jets, quantify reaction zones and the growth rate of silicon particles, and predict the movement of Si solids from the vessel.