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Hydrogen detection studyThe effectiveness was assessed of a hydrogen (H2) detection concept for regenerative environmental control life support systems (EC/LSS). The concept evaluated was that utilized for the electrochemical depolarized concentrator (EDC) design, constructed, and tested for the EC/LSS space station prototype program. The EDC contains combustible gas detectors (CGDs) which were evaluated with H2. The CGDs were evaluated for linearity, position sensitivity, reproducibility, ambient effects, repeatability, speed of response, recovery time, and interchangeability. The effectiveness of CGDs located within the EDC for sensing H2 leaks at various line replaceable units in the subsystem was determined. The effects of H2 leak rate, H2 concentration of leaking gas and air currents in the vicinity of the EDC were determined. Proposed improvements for the H2 detection concept were documented and alternative H2 detection approaches were identified and analyzed.
Document ID
19750009899
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Shumar, J. W. (Life Systems, Inc. Cleveland, OH, United States)
Powell, J. D. (Life Systems, Inc. Cleveland, OH, United States)
Date Acquired
September 3, 2013
Publication Date
September 1, 1974
Subject Category
Man/System Technology And Life Support
Report/Patent Number
NASA-CR-137563
LSI-ER-170-85
Accession Number
75N17971
Funding Number(s)
CONTRACT_GRANT: NAS2-6478
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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