Quantcast ONBOARD OXYGEN GENERATING SYSTEM

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
with steel taps or hobnails. Oxygen-permeated clothing will burn vigorously—a most painful way to die. 11. When servicing a liquid oxygen system, ensure that only oxygen conforming to specifica- tion MIL-0-27210D is used. Oxygen procured under Federal Specification BB-0-925A is intended for technical use and should NOT be used in air- craft oxygen systems. 12. After the completion of repairs, always perform an operational check of the system and make the required tests to ensure that the oxygen is safe for use by the pilot and crew. ONBOARD OXYGEN GENERATING SYSTEM Learning Objective: Identify the system components and operation of the onboard oxygen generating system. The onboard oxygen generating system (OBOGS) is an alternative to liquid oxygen (LOX). When compared to a LOX system, the OBOGS has several advantages. First, its availability y may be as high as 99 percent. There is no requirement for depot-level maintenance. The OBOGS has no daily service requirements, and scheduled preventive maintenance occurs at 2,000 hours. Incorporation of the OBOGS eliminates the need to store and transport LOX. Additionally, it eliminates the need for LOX support equipment. The potential for accidents related to LOX and high-pressure gases is greatly reduced. SYSTEM COMPONENTS The basic components of the OBOGS are the concentrator, oxygen monitor, and oxygen breathing regulator. The concentrator produces an oxygen-rich gas by processing engine bleed air through two sieve beds. The oxygen monitor senses the partial pressure of the gas and, if necessary, provides a low-pressure warning to the pilot. The oxygen regulator is a positive pressure regulator. SYSTEM OPERATION The OBOGS, shown in figure 4-16, receives engine bleed air from the outlet of the air- conditioning heat exchanger. The partially cooled air passes through an air temperature sensor to a pressure reducer assembly. The air is then routed Figure 4-16.—Onboard Oxygen Generating System (OBOGS) schematic. to the concentrator. The concentrator has a rotary valve that alternates the airflow over the molecular sieve beds. The sieve beds absorb the nitrogen and allow the oxygen and argon to pass through. TWO molecular sieve beds are used in the concentrator so that while one bed is absorbing, the other is desorbing (releasing) nitrogen. This method allows a continuous flow of oxygen to the system. After the concentrator, the oxygen flows to a plenum assembly that acts as a surge tank and an accumulator. The plenum also functions as a heat exchanger to heat or cool the oxygen to approximately cockpit temperature. Before the oxygen reaches the oxygen regulator, the oxygen performance monitor senses the partial pressure of the gas and, if necessary, provides a signal to the pilot whenever the pressure exceeds prescribed limits. The oxygen then flows through the regulator to the pilot’s mask. 4-25



Aviation News
VietJet Air celebrates delivery of first aircraft ordered from Airbus
Carrier embarks on major expansion with best-selling A320 Family Share...
airbus.com
Boeing Delivers Sixth Indian P-8I Maritime Patrol Aircraft
The Boeing P-8I maritime patrol aircraft. Photo: Boeing [Avionics Today...
aviationtoday.com
Temporary Flight Restriction (TFR) over Ferguson, Missouri
The Federal Aviation Administration activated a Temporary Flight Restriction (TFR)...
faa.gov
School-Company Agreement: Airbus and ENIT, working together
Future talents for an industry where excellence is key Share...
airbus.com
FAA's Holiday Travel Tips
November 24The U.S. Department of Transportations Federal Aviation Administration (FAA)...
faa.gov
Making a waste reduction difference at Airbus
Airbus’ significant efforts to help reduce waste at work are...
airbus.com
FAA Announces Contingency, Security Protocol Changes
FAA announces a series of changes that will lead to...
faa.gov
Frontier Airlines orders nine Airbus A321ceo aircraft
Deal marks customer’s first order for largest A320 Family member...
airbus.com
DC Airspace Gets Major NextGen Upgrade
FAA announces NextGen air routes for Washington airspace in time...
faa.gov
AGI Software Enhances Air Force AMC Tech for Humanitarian Relief
GLADS software solution. Photo: Analytical Graphics, Inc. [Avionics Today 11-21-2014]...
aviationtoday.com
Delta orders 50 Airbus widebody aircraft
25 A350-900 and 25 A330-900neo to join fleet of leading...
airbus.com
Airbus and UNESCO partner on global student challenge Fly Your Ideas
Empowering a new generation of young innovators Share this Read...
airbus.com
Airbus announces distinguished evaluation Jury for the 2nd GEDC Airbus Diversity Award
Leading Aircraft manufacturer, Airbus, announces the members of the prestigious...
airbus.com
Northrop Grumman New Open-Architecture DIRCM Laser Protects Crew and Cargo
Northrop Grumman offices. Photo: Northrop Grumman [Avionics Today 11-20-2014] Northrop...
aviationtoday.com
North Texas NextGen Procedures Deliver Benefits
NextGen project in North Texas to deliver more on-time flights,...
faa.gov
Eurocontrol and EDA Collaborate to Provide SESAR Military Perspective
[Avionics Today 11-19-2014] Eurocontrol and the European Defence Agency (EDA)...
aviationtoday.com
Innovative by nature: Airbus establishes a company-wide network for bionics projects
Airbus believes that much can be learned by studying the...
airbus.com
NTSB Rules Favorably on FAA UAS Appeal
November 18The National Transportation Safety Board today affirmed the FAAs...
faa.gov
Northrop Grumman Awarded $210 Million to Supply Joint STARS to US Air Force
Technicians demonstrating the Joint STARS system. Photo: Northrop Grumman [Avionics...
aviationtoday.com
BAE Systems Submits Proposal to Protect US Troops Against Infrared Threats
The Common Infrared Countermeasure (CIRCM) system. Photo: BAE Systems [Avionics...
aviationtoday.com


Privacy Statement - Copyright Information. - Contact Us

comments powered by Disqus

Integrated Publishing, Inc.
9438 US Hwy 19N #311 Port Richey, FL 34668

Phone For Parts Inquiries: (727) 755-3260
Google +