Browse Topic: Cabin pressurization

Items (55)

8/11/2021

This slash document collects general reference material related to gaseous oxygen system flow requirements and sizing calculations. This document will assist oxygen system equipment designers and operators to establish systems and equipment requirements. The document consists of charts, tables, system schematics, system requirements, and sample calculations for system sizing.

A-10 Aircraft Oxygen Equipment Committee

Air Conditioning of Aircraft Cargo

AIR806B (Current)5/12/2020

The report presents air conditioning data for aircraft cargo which is affected by temperature, humidity, ventilation rate and atmospheric pressure. The major emphasis is on conditioning of perishable products and warm-blooded animals. The report also covers topics peculiar to cargo aircraft or which are related to the handling of cargo.

AC-9 Aircraft Environmental Systems Committee

Energy Recovery Rate from an Electric Air-Cycle System under the Cruising Altitude and Speed

2019-01-19059/16/2019

A new electric air-cycle system of aircrafts is investigated focusing on energy recovery from the exhaust air. The working fluid of air has the higher energy level in the cabin than in the outside during the cruise because the outside air is at low pressure and low temperature. In the system, by setting a recovery turbine behind the cabin, the discharged energy can be collected, although the working fluid through the system has been only discharged from the cabin into the outside. We perform a thermodynamic cycle-analysis, where the temperature, pressure, entropy, etc. are calculated at each position of the cycle by considering the two pressure ratios of the compressors as variable parameters to show T-s diagram. In addition, we obtain an energy recovery rate of the recovery energy to the necessary power for the electric compressor. The energy recovery rate is roughly estimated 40-80% under the reasonable practical operating conditions.

Adachi, Takahiro, Seki, Naoki, Oyori, Hitoshi, Muraoka, Mikio

Exits and Their Operation - Air Transport Cabin Emergency

ARP488F (Current)3/14/2018

This SAE Aerospace Recommended Practice (ARP) provides design and performance recommendations for emergency exits in the passenger cabin.

S-9B Cabin Interiors and Furnishings Committee

Using Paraffin Phase Change Material to Make Optical Communication-Type Payloads Thermally Self-Sufficient for Operation in Orion Crew Module

TBMG-23208

11/1/2015

The Orion Crew Module has a pressurized cabin of approximately 20 m3 in volume. There are a number of cold plates within the Crew Module for thermal management. An optical communication type of payload consists of electronics boxes and modems that dissipate a significant amount of heat during science operation. Generally, such payloads operate for a short term (e.g., up to one hour). If these heat-dissipating components are flown inside the Crew Module, they require heat rejection to the cold plates in the Crew Module. The waste heat is transported from the cold plate to thermal radiators located outside the Orion spacecraft. This makes such a payload thermally dependent on the Crew Module cold plates.

Cabin Pressure Monitors Notify Pilots to Save Lives

TBMG-20979

11/1/2014

Typical cruising altitudes for business and commercial aircraft are up to 50,000 feet or more. Occupants could not survive in this environment without pressure inside the aircraft being controlled to maintain oxygen concentrations consistent with those at lower altitudes. A cabin pressure warning system typically lets pilots and crews know when pressure becomes dangerously low, but these can malfunction or be accidentally switched off. The result can be insidious and deadly, as those on the plane become slowly incapacitated by hypoxia — oxygen deprivation — without being aware of it.