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Cabin Pressurization  
User currently offlineCOexpress From United States of America, joined May 2001, 32 posts, RR: 0
Posted (11 years 6 months 2 weeks 3 days 4 hours ago) and read 2866 times:

Can someone explain to me "in a nutshell" exactly how cabin pressurization is achieved?

7 replies: All unread, jump to last
 
User currently offlineDoug_or From United States of America, joined Mar 2000, 3414 posts, RR: 3
Reply 1, posted (11 years 6 months 2 weeks 3 days 4 hours ago) and read 2853 times:

bleed air is taken off the engines somewhere in the compressor section, routed through an a/c unit (not like what you have in yuor window), and dumped into the cabin. holes in the fuesalage called outflow vavles open and close to maintain the correct cabin preasure.


When in doubt, one B pump off
User currently offlineOPNLguy From , joined Dec 1969, posts, RR:
Reply 2, posted (11 years 6 months 2 weeks 3 days 4 hours ago) and read 2829 times:

In 25 words or less,

The aircraft's air-conditioning packs pump air in to pressurize the cabin, and the outflow valve(s) open enough to keep the cabin from over-pressurizing.



User currently offlineCdfmxtech From United States of America, joined Jul 2000, 1341 posts, RR: 27
Reply 3, posted (11 years 6 months 2 weeks 3 days 3 hours ago) and read 2802 times:

OPNL

I love how u made "air conditioning" one word to keep withing the 25-word threshold!!!  Big thumbs up


User currently offlineJETPILOT From United States of America, joined May 1999, 3130 posts, RR: 29
Reply 4, posted (11 years 6 months 2 weeks 3 days 2 hours ago) and read 2809 times:

AC packs dont pump air into the cabin.

High pressure air bled from the engines seeks lower pressure, the path the air takes to the cabin is routed through an AC pack.

The AC pack is there to provide cold, warm, and hot air to a temp mixing valve to supply the cabin with for pressurization and temp control.

The AC pack is an air cycle machine as opposed to a vapor cycle machine that uses refrigerant.

JET


User currently offlineOPNLguy From , joined Dec 1969, posts, RR:
Reply 5, posted (11 years 6 months 2 weeks 3 days 2 hours ago) and read 2776 times:

>>>OPNL I love how u made "air conditioning" one word to keep withing the 25-word threshold!!!

We dispatchers have been known to get creative...  Big grin


JETPILOT,

I was just trying to keep it as simple as possible for the gent...


User currently offlineJETPILOT From United States of America, joined May 1999, 3130 posts, RR: 29
Reply 6, posted (11 years 6 months 2 weeks 3 days 2 hours ago) and read 2770 times:

OPNLguy... I was trying to keep it as accurate as possible....

 Big thumbs up

JET


User currently offlineOPNLguy From , joined Dec 1969, posts, RR:
Reply 7, posted (11 years 6 months 2 weeks 3 days 2 hours ago) and read 2777 times:

>>>I was trying to keep it as accurate as possible....

Roger that..


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