The Most Powerful Greenhouse Gas Known to Man
This one is worse than methane. Methane is known to be 30 times more potent as a greenhouse gas then CO2. But sulphur hexafluoride, or SF6, beats it out of the park, it is 23,500 times more warming than CO2.
It is colourless, odourless, synthetic gas. It makes a hugely effective insulating material for medium and high-voltage electrical installations. It is widely used in the electrical industry to prevent short circuits and accidents.
Compared to the past, there are more connections to the electricity grid, and a rise in the number of electrical switches and circuit breakers that are needed to prevent serious accidents. Collectively, these safety devices are called switchgear. The vast majority use SF6 gas to quench arcs and stop short circuits.
"As renewable projects are getting bigger and bigger, we have had to use it within wind turbines specifically ... " says engineer in the post above.
Since the 1950’s, the U.S. electric power industry has used SF6 in circuit breakers, gas-insulated substations and other switchgear used in the transmission system to manage the high voltages carried between generating stations and customer load centers. Disconnectors and ground switches use SF6 primarily for insulation, and individually, they contain only slightly less SF6 than a circuit breaker. These devices are used to isolate portions of the transmission system where current flow has been interrupted (using a circuit breaker). Gas-insulated substations also use a significant amount of SF6, and GIS installations house SF6-insulated circuit breakers, busbars and monitoring equipment. The largest use of SF6 occurs in high-voltage circuit breakers, where, in addition to providing insulation, SF6 is used to quench the arc formed when an energized circuit breaker is opened.