SELF-REGULATED OXYGEN CONCENTRATOR.
Final technical rept. Jan 66-Jan 67,
TRW EQUIPMENT LABS CLEVELAND OH
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A program to design, fabricate and test a model of an oxygen concentrator employing a method of control termed self regulation was successfully conducted. The stack assembly consists of three cells, where the oxygen is electrochemically separated from the air, sandwiched between two humidifier chambers. The self-regulation of the unit results from the thermal equilibrium that exists between the heat generated in the electrochemical cells during the O2 concentrating process and the evaporative cooling in the humidifiers due to the air humidification process. This mode of operation eliminates external humidifiers and associated thermal controls previously used on apparatus of this type. As a laboratory model, the three-cell unit demonstrated oxygen delivery rates up to 0.045 lbhr while displaying oxygen purities at a level of 100. Wide-range parametric testing conducted on the unit covered cell operating temperatures of 100-175F, air inlet pressures from 5-90 psia, air flow rates from 2-5 times theoretical, and current densities up to 166 ampssq ft. The testing program was culminated with 200 hours of testing which successfully demonstrated the self-regulating characteristics of the unit. As a final conclusion, the data and analyses are used to specify an advanced 0.2-lbhr oxygen concentrator utilizing self-regulation in addition to size optimization. With additional development the design will be capable of being incorporated into an aviators oxygen supply system. Author
- Air Conditioning, Heating, Lighting and Ventilating
- Life Support Systems