Download or read book On Board Oxygen Generating Systems Molecular Sieve written by A-10 Aircraft Oxygen Equipment Committee and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The information provided in SAE AIR825/6 applies to On Board Oxygen Generating Systems (OBOGS) - Molecular Sieve, that utilize the ability of molecular sieve materials by using Pressure Swing Adsorption Process (PSA) to separate and concentrate oxygen in the product gas from the surrounding air, respectively air provided by any compressor or by the aircraft engine (so called: Bleed Air), and to provide this oxygen enriched air or product gas as supplemental oxygen for breathing gas supply of crew and passengers onboard aircraft. The distribution system and the provided oxygen concentration have to fulfill the respective FAA/JAA regulations.Equipment using this technology to provide supplemental oxygen for breathing gas supply of crew and passengers onboard aircraft, the suitable breathing gas oxygen partial pressure or oxygen concentration requirements are specified in AIR825/2 and the oxygen purity requirements in AS8010.NOTE: OBOGS has never been certified for commercial aircraft. The FAR/JAR 25 as well as FAR 121/JAR-OPS need to be reviewed and if necessary amended prior to introduction of OBOGS. Alternatively, such certification will likely incorporate various special conditions that address differences in performance between OBOGS and conventional systems.These systems are intended for: athe on-line breathing gas supply to directly account for the normal oxygen usage of crew and passengers in terms of: 1supplemental oxygen for part or all of an emergency descent 2supplemental oxygen for first aid 3therapeutic oxygen bthe replenishment of the aircraft gaseous oxygen system storage cylinders to account for the normal oxygen usage of crew and passengers and system leakage ca combination of the above.The possible applicability and benefit of incorporation of OBOGS-Molecular Sieve into non-military aircraft is being considered by the representatives of Civil Aviation. The intended aim of AIR825/6 is to provide a fundamental description of the function of existing OBOGS-Molecular-Sieve systems with a related reference to the type of oxygen standards which would merit a review. AIR825/6 has been reaffirmed to comply with the SAE five-year review policy.
Download or read book Environmental Test and Evaluation of a Molecular Sieve On Board Oxygen Generation System written by Matthew J. Lamb and published by . This book was released on 1978 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of the high support costs, increase in aircraft down time, and hazards associated with the use of liquid oxygen, development has been progressing on On-Board Oxygen Generation Systems which have the capability of meeting the requirements of a two man open loop breathing schedule. An evaluation program was conducted on an oxygen generator utilizing the molecular sieve concept of nitrogen absorption. The system was developed to establish unit performance in the environment anticipated during in flight operation. Oxygen concentration has been evaluated as a function of inlet air pressure.
Download or read book U S Navy Molecular Sieve On Board Oxygen Generation System An Update written by Matthew J. Lamp and published by . This book was released on 1978 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: This center has been conducting a development program to explore the On-Board Oxygen Generation (OBOG) concept for application aboard tactical Naval aircraft. The objective of the program is to eliminate hazardous and logistically burdensome LOX (liquid oxygen) installations on ships, as well as in forward basing areas, by generation of oxygen on board the aircraft. Program progress includes: (1)Major reduction in values of weight and resource requirements to acceptable levels; (2) Development of hardware prototypes of the proposed systems suitable for flight test; (3) Aircraft/OBOG systems integration studies; (4) Laboratory T & E of the prototype systems; (5) Physiological assessment (man rating) of the prototype systems; and (6) Flight testing to date. This paper reports current progress including: Laboratory qualification testing and Technical Evaluation.
Download or read book United States Navy Molecular Sieve On board Oxygen Generation OBOG System Development Efforts written by Matthew J. Lamb and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molecular Sieve Generation of Aviator s Oxygen written by Richard L. Miller and published by . This book was released on 1978 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The molecular sieve method of generating an enriched-oxygen breathing gas is one of three candidate on-board oxygen generation (OBOG) systems under joint Navy-Air Force development for application in tactical aircraft. As part of this program, the performance of a nominal 2-man-capacity molecular sieve oxygen generation system (MSOG) was characterized under simulated flight conditions. Data were given on the composition (oxygen, nitrogen, carbon dioxide, and argon) of the MSOG-generated breathing gas as a function of inlet air pressure, altitude, and gas flow rate. The maximum oxygen concentration observed was 95% with the balance argon. Under certain conditions of pressure, altitude, and flow, the argon enrichment factor exceeded that of oxygen giving a maximum argon concentration of 6.4% with the balance oxygen. The performance of the MSOG was discussed in the context of aircraft operating envelopes using both diluter-demand and 100% delivery subsystems.
Download or read book Computer Simulation of a Molecular Sieve Oxygen Generator written by Ali R. Husnain and published by . This book was released on 1994 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Digital Control System for An On Borad Oxygen Generator written by Thomas C. Horch and published by . This book was released on 1980 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: A prototype on-board oxygen generation system (OBOGS) is being tested by the USAF School of Aerospace Medicine (SAM). The OBOGS is a candidate to replace present liquid oxygen systems for aircrew consumption on manned aircraft. The OBOGS passes outside air through a molecular sieve to produce an oxygen enriched breathing product. Oxygen concentration of the OBOGS's output is controlled by a purge orifice valve. The SAM envisions using a digital system to control the OBOGS. A digital control system for the OBOGS was developed and consists of a stepper motor, microprocessor, system sensor, support circuitry, and software. The control system software is a collection of instructions which allow the MPU to read data from sensors, to interpret that data, and to issue system hardware control signals. System software was fairly complex as methods were employed to compensate for the OBOGS's lengthy response time. This was accomplished by using a segmented table. If motor drive is anticipated to be time-consuming, a software routine is used to preposition the motor to a predetermined location within the segmented table. This position is updated when more accurate information is available. A prototype system was constructed and tested in the laboratory. The control system successfully controlled the stepper motor.
Download or read book Aeromedical Evaluation of the Army Molecular Sieve Oxygen Generator AMSOG Systems written by Frank S. Pettyjohn and published by . This book was released on 1977 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular sieve technology has been considered as an alternative source of oxygen for US Army operational fixed and rotary wing aircraft. With the constraints of weight, size, and electrical power, the Army molecular sieve oxygen generator (AMSOG) appeared to meet operational needs. Initial design was predicated on direct replacement of current oxygen equipment for the two man crew OV-1 Mohawk surveillance aircraft. Initial bench and hypobaric chamber testing demonstrates a capability to provide 90-94% oxygen at sea level using engine bleed or compressed air at 40 PSIG, 20 to 22 liters per minute (LPM), normal temperature 70 deg F, pressure 760 Torr, dry (NTPD). Ninety-four percent (94%) oxygen is expected to support both physiologic needs and provide denitrogenation capabilities for US Army aircrew. Argon is concentrated to levels of 6-8% and is considered to be low; however, physiologic effects have not been fully defined. In-flight studies and toxicology evaluation are continuing. (Author).
Download or read book Man Rating the B 1B Molecular Sieve Oxygen Generation System written by John B. Tedor and published by . This book was released on 1987 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report sets forth the findings of a test and evaluation (man rating) of the molecular sieve oxygen generation system developed for the 1B Long Range Combat Aircraft. A series of unmanned and manned tests, covering the range of aircraft operating conditions, were conducted on a duplicate of the aircraft breathing system which was assembled in an environmental chamber. The control variables were cabin and aircraft ambient pressure, inlet air temperature and pressure, cabin temperature, and demand flow; and the dependent variables were oxygen concentration, pressure swings in the mask, and time required for backup oxygen to reach the crew after rapid decompression (RD). Oxygen output met or exceeded specification requirements for all but two test points. Under nominal aircraft operating conditions and the maximum average demand flow of 160 liters per minute (1pm), oxygen concentration fell slightly below specification requirements at 25,000 and 28,000 ft cabin altitude. These discrepancies are not considered significant (i.e., will not compromise crew safety), because the probability is very slight that a demand flow rate as high as 160 1pm will ever occur (tests showed that 6 persons taking moderately heavy, rapid breaths generated 135 1pm average demand at ground level). Furthermore, the oxygen partial pressure, in the worst case, was equivalent to breathing air at only 4,000 ft pressure altitude.
Download or read book Technology 2001 written by and published by . This book was released on 1991 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laboratory Test and Evaluation of the Litton Model F15E Molecular Sieve Oxygen Generating System written by Brendan E. Squire and published by . This book was released on 1993 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Litton Model F15E Molecular Sieve Oxygen Generating System, was tested for environmental and electromagnetic interference/compatibility in the UH-60A helicopter under the U.S. Army Program for Testing and Evaluation of Equipment for Aeromedical Operations. The tests were conducted using current military and industrial standards and procedures for environmental tests and electromagnetic interference/compatibility and human factors. The Litton Model F15E performed properly in the test environments. It consistently produced high concentration (greater than 90%) oxygen at an output flow of 27 lpm. The unit produces a significant amount of noise while operating. The unit is susceptible to radio frequency interference from 40-41 MHz and some broadband emissions exceeded the test criteria. Electromagnetic compatibility, Test and evaluation, Aeromedical equipment.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 1572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Defense Department Authorization and Oversight written by United States. Congress. House. Committee on Armed Services and published by . This book was released on 1987 with total page 1998 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Department of Defense appropriations for 1987 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Defense and published by . This book was released on 1986 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Department of Defense Appropriations for written by United States. Congress. House. Committee on Appropriations and published by . This book was released on 1986 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of On Board Oxygen and Nitrogen Generation Systems for Surface Vessels written by Zsolt Golenko and published by . This book was released on 1983 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most Navy surface vessels are equipped with cryogenic (LOX and LN) storage-evaporator gas supply systems to produce oxygen and nitrogen for life support, flight service, and other system applications. Increased mobility and independence of land-base logistic support requires new, on-board O2 and N2 generation systems, to be installed on existing and future Navy ships. This study summarizes existing industrial candidate systems, and overviews some new processes under development. Analysis was conducted on gaseous oxygen and nitrogen generation systems of the most likely candidates, and particular attention was focused on molecular sieve gas separators. Next, the report concentrates on engineering design guidelines for constructions of on-board gas generators of confined scales. Safety, maintenance, and standard (industrial and MIL) requirements are summarized to help construct, test, and evaluate a scaled prototype on-board O2/N2 generation system. The study identified two types of presently available industrial gas generation systems suitable for confined on-board applications. However, significant modifications and development are necessary to meet filtration, protection and stress-prevention requirements.
