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Effects of Cabin Upsets on Adsorption Columns for Air RevitalizationThe National Aeronautics and Space Administration (NASA) utilizes adsorption technology as part of contaminant removal systems designed for long term missions. A variety of trace contaminants can be effectively removed from gas streams by adsorption onto activated carbon. An activated carbon adsorption column meets NASA's requirements of a lightweight and efficient means of controlling trace contaminant levels aboard spacecraft and space stations. The activated carbon bed is part of the Trace Contaminant Control System (TCCS) which is utilized to purify the cabin atmosphere. TCCS designs oversize the adsorption columns to account for irregular fluctuations in cabin atmospheric conditions. Variations in the cabin atmosphere include changes in contaminant concentrations, temperature, and relative humidity. Excessively large deviations from typical conditions can result from unusual crew activity, equipment malfunctions, or even fires. The research carried out under this award focussed in detail on the effects of cabin upsets on the performance of activated carbon adsorption columns. Both experiments and modeling were performed with an emphasis on the roll of a change in relative humidity on adsorption of trace contaminants. A flow through fixed-bed apparatus was constructed at the NASA Ames Research Center, and experiments were performed there. Modeling work was performed at the University of Virginia.
Document ID
19990113197
Document Type
Other
Authors
LeVan, Douglas (Vanderbilt Univ. Nashville, TN United States)
Date Acquired
August 19, 2013
Publication Date
May 1, 1999
Subject Category
Spacecraft Instrumentation
Funding Number(s)
CONTRACT_GRANT: NGT2-52203
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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