NASA NTRS · 19800002554
Portable breathing system
Abstract
A semiclosed-loop rebreathing system is discussed for use in a hostile environment. A packed bed regenerative heat exchanger providing two distinct temperature humidity zones of breathing gas with one zone providing cool, relatively dry air and the second zone providing hot, moist air is described.
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Lovell, J. S.. 1979-09-25. Portable breathing system. https://ntrs.nasa.gov/citations/19800002554
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