Mxsmanic wrote:
> Mike Hunt writes:
>
>
>>Are you sure about this? That isn't how Boeing describes it.
>
>
> It depends on the aircraft; not all aircraft handle cabin air
> conditioning and pressurization in the same way. How does Boeing
> describe it?
>
Currently there is about one nonstop flight from Darwin to SYD.
That QF 828, which uses a 737. While the document below describes a
typical flight on a 767, the basics are the similar. Perhaps you are
referring to other types of aircraft, so I will excuse your ignorance on
how this works on aircraft like the 737 and 767. I really haven't
studied how AB does it, but I would guess it isn't too much differnt.
In a nutshell
1. Outside air enters the engine. Outside it is cold and has very low
pressure.
It is compressed to 32 psi with a temperature of 330 degrees F.
(I would guess you probably studied the relationship of pressure and
temperature in school)
2. This air must be cooled before entering the cabin (You don't want to
breath 330 degree air, do you?)
Here is a nice doc for you to look at:
http://www.boeing.com/commercial/cabinair/ecs.pdf
Please contact Boeing, if you disagree.
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