GE Audio & Video: Podcasts, Stream GE, On Demand
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[GE's always been on the cutting edge of conversion technology,]
[but quite simply- with the introduction of GE TAPS technology and the GNex engine--]
[we've changed the game when it comes to NOx emissions.]
[Although not as well known as greenhouse gases like carbon dioxide,]
[NOx--or oxides of nitrogen produced at high altitudes--can also effect climate change.]
[Aircraft are only a very minor source of the world's NOx,]
[a fraction of the leading contributors, such as cars, trucks, farm machinery, ]
[International regulations set standards for acceptable levels of emissions ]
[produced by aircraft during landing and takeoff, but this accounts]
[for only a small part of emissions produced during a flight.]
[En route, or cruise NOx, make up the vast majority of the total emissions.]
[Until the introduction of TAPS technology, designers focused on]
[ the regular equal altitude landing and takeoff emissions.]
[and accepted the resulting cruise emissions.]
[GE TAPS enables the designers to minimize both the low altitude emissions]
[and the high altitude cruise emissions.]
[In fact, GE TAPS reduces cruise NOx emissions by more than half. ]
[compared to the prior Best in Class combustors.]
[Also, consider this--NOx is produced in the engine's combustor ]
[when the fuel is burned at high temperatures.]
[Quite simply, the higher the temperature, the more NOx is produced.]
[Efforts to reduce the amount of fuel burned during a flight]
[have resulted in increase in temperature at the inlet to the combustor.]
[While this has reduced carbon emissions, which is good,]
[It's had an adverse effect on NOx emissions, which is bad.]
[GE TAPS technology has enabled reduction in cruise carbon emissions]
[while at the same time reducing NOx emissions--]
[the best of both worlds, as it were.]
[The secret to success of the GE TAPS combustion system]
[are the TAPS fuel air mixer and the computer controlled fuel system.]
[The fuel air mixer creates 2 different flame zones within the combustor,]
[while a controller calculates the amount of fuel and air that needs to be burned,]
[measures the temperature of air entering the combustor, then precisely controls]
[the distribution of fuel within the 2 TAPS combustion zones]
[to keep each flame just hot enough for clean burning,]
[but cool enough to prevent the production of high levels of NOx.]
[[GEnx emissions certification testing]]
[ These features quite simply revolutionize the combustion process,]
[much like the fuel injection system that we placed in traditional carburator]
[to produce much lower emissions in your car.]
[The combination of the GE TAPS combustion system--along with other technology]
[on the GEnx engine--results in one of the most advanced engines available today.]
