GasVue and the Magnesium Industry: Advanced SF6 Leak Detection
نویسنده
چکیده
Concerns about atmospheric emissions of greenhouse gases and operation costs are converging to increase incentives for both the electric utility and magnesium industries to rapidly locate and repair equipment leaks (Irwin, 1997). The primary culprit is sulfur hexafluoride (SF6), an invisible, non-hazardous, inert gas with near-perfect dielectric properties that is used as an insulating gas in high-voltage switchgear and circuit breakers, as well as a cover gas during magnesium processing. It is also an extremely efficient absorber of infrared radiation, making it one of the most potent of all known greenhouse gases. Although its atmospheric concentration is less than 0.1% of that of the major greenhouse gas (CO2), SF6 was among the six greenhouse gases targeted for emissions reduction at the 1997 Kyoto Japan Summit. On an equivalent basis of global warming potential, SF6 accounts for 14% of the greenhouse gas emission reductions that the U.S. and 150 other nations agreed to make by 2012. It is commonly estimated that, directly or indirectly, the electric power industry purchases about 80% of all SF6 produced. Although the magnesium processing industry uses much less SF6 than the electric power industry, its use as a melt protection gas means an inevitable release into the atmosphere.
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