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Performance Testing of a New Membrane Evaporator for the Thermoelectric Integrated Membrane Evaporator System (TIMES) Water Processor
Technical Paper
2002-01-2525
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The TIMES system was evaluated to determine its ability to process reverse osmosis (RO) brine as one of the Advanced Water Processor steps. Since preliminary testing performed in 1998 showed that the membrane typically used in the process (Nafion 117) offered a very poor ammonia rejection, a search for an alternate membrane exhibiting high ammonia rejection capability was initiated under NASA-JSC funding. This investigation has resulted in the selection of a PolyVinylAlcohol (PVA) composite membrane as a replacement.
When processing RO brine and untreated human urine as feeds, the Pervap 2201 membrane showed a 96% ammonia rejection over a large range of ammonia concentration. The water permeation rates in both laboratory-scale and pilot scale testings were also similar to the Nafion. The water permeance of the Pervap 2201 was approximately 7.5 kg/h/m2/atm (1.1 lb/h/m2/psi).
Authors
Citation
Thibaud-Erkey, C., Fort, J., Scull, T., and Edeen, M., "Performance Testing of a New Membrane Evaporator for the Thermoelectric Integrated Membrane Evaporator System (TIMES) Water Processor," SAE Technical Paper 2002-01-2525, 2002, https://doi.org/10.4271/2002-01-2525.Also In
References
- Thibaud-Erkey, C. Fort, J. H. Edeen, M. A. “A New Membrane for the Thermoelectric Integrated Membrane Evaporative Subsystem (TIMES)” SAE paper No. 2000-335 30 th International Conference on Environmental Systems Toulouse, France July 2000