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Environmental Control System(ECS)

Design Class PresentationAIAA Team 2Ryan Fortier

Greg Costanzo9/12/2006

http://www.boeing.com/commercial/cabinair/ecs.pdfhttp://www.boeing.com/commercial/cabinair/ecs.pdf

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Outline

• Pneumatic Subsystem

• Air Conditioning

• How it works

• Cabin Pressure

• Emergency Oxygen

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http://www.boeing.com/commercial/cabinair/ecs.pdf

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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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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

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http://www.boeing.com/commercial/cabinair/ecs.pdf

5http://www.boeing.com/commercial/cabinair/avi/1newintake.avi

How it Works

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Air enters engine

6http://www.boeing.com/commercial/cabinair/avi/5newpackanim.avi

How it Works

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Passes through a catalytic ozone converter

7http://www.boeing.com/commercial/cabinair/avi/6newpak2statmix.avi

How it Works

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Enters the air-conditioning packs

8http://www.boeing.com/commercial/cabinair/avi/8mixmanifold.avi

How it Works

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Enters the mixing manifold

9http://www.boeing.com/commercial/cabinair/avi/10maindistribution.avi

How it Works

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Outside air and re-circulated air mix

10http://www.boeing.com/commercial/cabinair/avi/12cabinvents.avi

How it Works

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Air is supplied to cabin

11http://www.boeing.com/commercial/cabinair/avi/13exhaust.avi

How it Works

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Air is exhausted from the airplane

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Emergency Oxygen

• Incase of a sudden drop in pressure• Types of systems

– Gaseous (crew)– Chemical (passengers)– Liquid oxygen (military)

• weight • volume

• 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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http://www.studio2f.com/misc/images/oxygen_masks_deployed.jpg

13http://www.carletonls.com/productsbu/aviationo2/ADV10572.pdf

ExampleAIAA Team 2 ECS

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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.

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http://www.boeing.com/commercial/cabinair/ecs.pdf

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Future

• Lower Cabin Pressure (~6000 ft)

http://www.boeingcapital.com/p2p/techredefinesjoy.htm

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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/aircraft/c-130-car.htm

• http://www.boeing.com/commercial/cabinair/ecs.pdf

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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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