Modeling of membrane processes for air revitalization and water recoveryGas-separation and reverse-osmosis membrane models are being developed in conjunction with membrane testing at NASA JSC. The completed gas-separation membrane model extracts effective component permeabilities from multicomponent test data, and predicts the effects of flow configuration, operating conditions, and membrane dimensions on module performance. Variable feed- and permeate-side pressures are considered. The model has been applied to test data for hollow-fiber membrane modules with simulated cabin-air feeds. Results are presented for a membrane designed for air drying applications. Extracted permeabilities are used to predict the effect of operating conditions on water enrichment in the permeate. A first-order reverse-osmosis model has been applied to test data for spiral wound membrane modules with a simulated hygiene water feed. The model estimates an effective local component rejection coefficient under pseudosteady-state conditions. Results are used to define requirements for a detailed reverse-osmosis model.
Document ID
19930057514
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Lange, Kevin E. (Lockheed Engineering & Sciences Co. Houston, TX, United States)
Foerg, Sandra L. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Dall-Bauman, Liese A. (NASA Johnson Space Center Houston, TX, United States)
Date Acquired
August 16, 2013
Publication Date
July 1, 1992
Subject Category
Man/System Technology And Life Support
Report/Patent Number
SAE PAPER 921352
Meeting Information
Meeting: SAE, International Conference on Environmental Systems