Environmental Control System (ECS)

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

ECS- Introduction

Engine Bleeds

B737 Air-conditioning Panel

B737 Pneumatics panel

Digital Cabin Pressure Control System (DCPCS)

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)

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

Air Conditioning

How it Works AIAA Team 2 ECS Air enters engine http://www.boeing.com/commercial/cabinair/avi/1newintake.avi

Passes through a catalytic ozone converter AIAA Team 2 ECS How it Works Passes through a catalytic ozone converter http://www.boeing.com/commercial/cabinair/avi/5newpackanim.avi

Enters the air-conditioning packs AIAA Team 2 ECS How it Works Enters the air-conditioning packs Packs = Pneumatic Air Conditioning Kit http://www.boeing.com/commercial/cabinair/avi/6newpak2statmix.avi

Enters the mixing manifold AIAA Team 2 ECS How it Works Enters the mixing manifold http://www.boeing.com/commercial/cabinair/avi/8mixmanifold.avi

Outside air and re-circulated air mix AIAA Team 2 ECS How it Works Outside air and re-circulated air mix http://www.boeing.com/commercial/cabinair/avi/10maindistribution.avi

Air is supplied to cabin AIAA Team 2 ECS How it Works Air is supplied to cabin http://www.boeing.com/commercial/cabinair/avi/12cabinvents.avi

Air is exhausted from the airplane AIAA Team 2 ECS How it Works Air is exhausted from the airplane http://www.boeing.com/commercial/cabinair/avi/13exhaust.avi

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

Example AIAA Team 2 ECS http://www.carletonls.com/productsbu/aviationo2/ADV10572.pdf

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.

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

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

References http://www.boeing.com/commercial/cabinair/ecs.pdf 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/aircraft/c-130-car.htm http://www.boeing.com/commercial/cabinair/ecs.pdf