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Experimental verification of electro-osmotic dehumidification with Nafion and Plaster-silica gel membranes.

Author(s) : GERLACH D. W.

Summary

In electro-osmotic dehumidification, a membrane composed of a desiccant material removes moisture from air to be conditioned. Then, electro-osmotic pumping driven by the application of voltage moves the moisture across the membrane and rejects it on the other side. A bench top experiment was developed to screen promising membrane materials. Two sealed humidity chambers were separated by a membrane. The changes in the humidity of the chambers were measured as current was applied to the membrane. The most successful inorganic membrane tested was a silica gel concrete using Plaster of Paris as the cement and silica gel particles as the aggregate. Nafion membranes were also tested and showed a higher current, mass flow rate, and water vapour partial pressure differential. However, the electro-osmotic flux is significantly smaller than predicted. Further research is needed to reconcile the experimental data and modeling in order to determine feasibility.

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Details

  • Original title: Experimental verification of electro-osmotic dehumidification with Nafion and Plaster-silica gel membranes.
  • Record ID : 2009-1736
  • Languages: English
  • Source: 2008 Purdue Conferences. 19th International Compressor Engineering Conference at Purdue & 12th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
  • Publication date: 2008/07/14

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