Modeling of Membrane Processes for Air Revitalization and Water Recovery

Paper #:
  • 921352

Published:
  • 1992-07-01
Citation:
Lange, K., Foerg, S., and Dall-Bauman, L., "Modeling of Membrane Processes for Air Revitalization and Water Recovery," SAE Technical Paper 921352, 1992, https://doi.org/10.4271/921352.
Pages:
14
Abstract:
Gas-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 pseudo-steady-state conditions. Results are used to define requirements for a detailed reverse-osmosis model.
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