A Fixed Percentage Binary Gas for Life Support Derived from Two Steady-State Cryogenic Liquids
The use of liquid air in manually portable life-support systems is becoming more and more common. Users of these systems, however, are experiencing difficulties which are inherent to liquid air. If a subcooled liquid is used, manual motion can collapse the pressure head to a point insufficient to satisfy demand flow rates. If a boiling liquid is used, the pressure head is retained but the percentage of the constituents in the liquid, from which the breathing gas is derived, changes with time. In either state, accidental breathing of the gas phase in the container can cause death due to low oxygen content, even though the liquid phase contains 21% oxygen. A new concept to overcome these inherent disadvantages is presented in this paper.
KeywordsPressure Head Supercooled Liquid Breathing Rate Relief Valve Binary Liquid Mixture
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