Environmental Control System
(ECS)
http://www.boeing.com/commercial/cabinair/ecs.pdf
http://www.boeing.com/commercial/cabinair/ecs.pdf
Design Class Presentation
AIAA Team 2
Ryan Fortier
Greg Costanzo
9/12/2006
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AIAA Team 2
ECS
Outline
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•
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Pneumatic Subsystem
Air Conditioning
How it works
Cabin Pressure
Emergency Oxygen
http://www.boeing.com/commercial/cabinair/ecs.pdf
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AIAA Team 2
ECS
Pneumatic Subsystem
• Cabin
pressurization
• Air conditioning
• Ice Protection
• Cross engine
starting
Courtesy: Airplane Design Part IV: Layout Design of Landing Gear and Systems (Pg. 334)
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AIAA Team 2
ECS
Air Conditioning
• Control temperature
• Takes air from the engine
bleed and cools it
• Air is filter through
purification systems
• 20 ft3 of air per min per
passenger
• Avionics equipment
require a direct line
http://www.boeing.com/commercial/cabinair/ecs.pdf
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AIAA Team 2
ECS
How it Works
Air enters engine
http://www.boeing.com/commercial/cabinair/avi/1newintake.avi
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AIAA Team 2
ECS
How it Works
Passes through a catalytic ozone converter
http://www.boeing.com/commercial/cabinair/avi/5newpackanim.avi
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AIAA Team 2
ECS
How it Works
Enters the air-conditioning packs
http://www.boeing.com/commercial/cabinair/avi/6newpak2statmix.avi
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AIAA Team 2
ECS
How it Works
Enters the mixing manifold
http://www.boeing.com/commercial/cabinair/avi/8mixmanifold.avi
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AIAA Team 2
ECS
How it Works
Outside air and re-circulated air mix
http://www.boeing.com/commercial/cabinair/avi/10maindistribution.avi
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AIAA Team 2
ECS
How it Works
Air is supplied to cabin
http://www.boeing.com/commercial/cabinair/avi/12cabinvents.avi
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AIAA Team 2
ECS
How it Works
Air is exhausted from the airplane
http://www.boeing.com/commercial/cabinair/avi/13exhaust.avi
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AIAA Team 2
ECS
Emergency Oxygen
• Incase of a sudden drop in pressure
• Types of systems
– Gaseous (crew)
– Chemical (passengers)
– Liquid oxygen (military)
• weight
• volume
http://www.studio2f.com/misc/images/oxygen_masks_deployed.jpg
• C-130 has a 25 liter liquid oxygen type system
– provides for 96 man-hours of oxygen at 25,000 feet
– portable units are also available
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AIAA Team 2
Example
http://www.carletonls.com/productsbu/aviationo2/ADV10572.pdf
ECS
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AIAA Team 2
ECS
Cabin Pressure
• 300 ft/min cabin pressure descending
• 500 ft/min cabin pressure ascending
• Don’t exceed a
cabin-to-outside
pressure
differential of
8.60 psi.
• Current cabin
pressure max out
at 8,500 ft.
http://www.boeing.com/commercial/cabinair/ecs.pdf
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AIAA Team 2
ECS
Future
• Lower Cabin Pressure (~6000 ft)
http://www.boeingcapital.com/p2p/techredefinesjoy.htm
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AIAA Team 2
ECS
References
• Jackson, Scott. “Systems Engineering for
Commercial Aircraft.” Ashgate Publishing
Limited. 1997.
• Roskam, Dr. Jan. “Airplane Design Part IV:
Layout Design of Landing Gear and Systems.”
Roskam Aviation and Engineering Corporation.
1986.
• http://www.globalsecurity.org/military/systems/air
craft/c-130-car.htm
• http://www.boeing.com/commercial/cabinai
r/ecs.pdf
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AIAA Team 2
ECS
Questions?
• For more detailed information:
“Fundamentals of Aircraft Environmental
Control.” by Alvin Ebeling.
Constrain of aircraft design is for the airflow
to travel lateral not longitudinally? Why?
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