1. Environmental Control System (ECS)
Design Class Presentation
AIAA Team 2
Ryan Fortier
Greg Costanzo
9/12/2006

2. Outline Pneumatic Subsystem Air Conditioning How it works
AIAA Team 2
ECS
Outline
Pneumatic Subsystem
Air Conditioning
How it works
Cabin Pressure
Emergency Oxygen

3. Pneumatic Subsystem Cabin pressurization Air conditioning
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)

4. Air Conditioning Control temperature
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

5. How it Works AIAA Team 2 ECS Air enters engine

6. Passes through a catalytic ozone converter
AIAA Team 2
ECS
How it Works
Passes through a catalytic ozone converter

7. Enters the air-conditioning packs
AIAA Team 2
ECS
How it Works
Enters the air-conditioning packs

8. Enters the mixing manifold
AIAA Team 2
ECS
How it Works
Enters the mixing manifold

9. Outside air and re-circulated air mix
AIAA Team 2
ECS
How it Works
Outside air and re-circulated air mix

10. Air is supplied to cabin
AIAA Team 2
ECS
How it Works
Air is supplied to cabin

11. Air is exhausted from the airplane
AIAA Team 2
ECS
How it Works
Air is exhausted from the airplane

12. Emergency Oxygen Incase of a sudden drop in pressure Types of systems
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
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

13. Example
AIAA Team 2
ECS

14. Cabin Pressure 300 ft/min cabin pressure descending
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.

15. Future Lower Cabin Pressure (~6000 ft) AIAA Team 2 ECS

16. References http://www.boeing.com/commercial/cabinair/ecs.pdf
AIAA Team 2
ECS
References
Jackson, Scott. “Systems Engineering for Commercial Aircraft.” Ashgate Publishing Limited
Roskam, Dr. Jan. “Airplane Design Part IV: Layout Design of Landing Gear and Systems.” Roskam Aviation and Engineering Corporation

17. Questions? For more detailed information:
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?