1. Environmental Control System (ECS)

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

3. ECS- Introduction

4. Engine Bleeds

5. B737 Air-conditioning Panel

6. B737 Pneumatics panel

8. Digital Cabin Pressure Control System (DCPCS)

9. 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)

10. Air Conditioning Control temperature
AIAA Team 2
ECS
Air Conditioning
Control temperature
Takes air from the engine bleed and cools it
Air is filtered through purification systems
20 ft3 of air per min per passenger
Avionics equipment require a direct line

11. Air Conditioning

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

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

14. Enters the air-conditioning packs
AIAA Team 2
ECS
How it Works
Enters the air-conditioning packs
Packs = Pneumatic Air Conditioning Kit

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

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

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

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

19. Emergency Oxygen In case of a sudden drop in pressure Types of systems
AIAA Team 2
ECS
Emergency Oxygen
In case 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

20. Example
AIAA Team 2
ECS

21. 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 (0.6 Bar).
Current cabin pressure max out at 8,500 ft.

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

24. Other Aircraft Systems
APU
Emergency Equipment
Fire Protection
Ice & Rain Protection
Warning Systems

25. 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