abelard Wrote:
-------------------------------------------------------
> >> This is wrong?
> >
> >
> >
http://www.boeing.com/boeing/commercial/cabinair/
>
>
> With respect, Vexxxed, the information on this
> page doesn't speak directly to whether or not the
> air quality on planes has gotten better. It says
> something about how the air systems have changed
> but not whether airlines could improve air quality
> if they wanted to.
>
> And I may have misspoke about air being
> 'recirculated', Morbo, but is it sounds possible
> that I might still be right, or at least not
> totally wrong. Any chance that they've dialed
> back the air coming in to increase fuel economy?
> Or are the compressors just too trivial a part of
> the energy used to run the engines? I'm honestly
> curious - this really isn't my area of expertise.
More here:
https://en.wikipedia.org/wiki/Cabin_pressurization
Turns out some air is recurculated depending on the system, but in general the engines provide more air than you need to pressurize the cabin, and the outflow vent regulates it.
Those engines gulp enormous amounts of air, I doubt the amount they bleed off for cabin air makes much of a difference. They are also using the engines to generate electricity.
Given that the pilot is breathing the same air you air, I don't think they'd want to cut back on the oxygen content. Might be bad for business.
In any case I remember being on an international flight where smoking was allowed years after they banned it in the US, and I can vouch for the fact that not having cigarette smoke in the cabin is way better. For the first half hour smoking wasn't allowed, and then when we were over water they let people light up and was instant misery.