Water flux in membrane Fuel cell humidifiers: flow rate and channel location effects.

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DOIResolve DOI: http://doi.org/10.1016/j.jpowsour.2007.08.103
AuthorSearch for: ; Search for:
TypeArticle
Journal titleJournal of Power Sources
Volume180
Issue1
Pages408418; # of pages: 11
SubjectHumidifier; Membrane; Fuel cell; Water management; Mass transfer; Single phase
AbstractA straight, single channel membrane humidifier was constructed to measure temperature and moisture profiles along both the donor and receiver channels. A persulfonic Nafion membrane was used as the water exchange medium. We report on results obtained with single-phase vapour-to-vapour, counter flow operation. First, the heat loss to the surroundings was quantified and found to affect the overall performance significantly. Second, the results from varying flow rates indicate that lower flow rates lead to higher outlet dew point values of the receiver stream which can be related to longer residence times. It was also found that moisture transfer is more strongly influenced by the flow rate through the receiver side than the donor side. Finally, five-point dew point profiles for both donor and receiver sides are reported for various temperature conditions. No stream wise variation in moisture flux was observed, and the average flux value increased from 3.3 × 10−5 kg s−1 m−2 at 30 °C to 2.0 × 10−4 kg s−1 m−2 at 70 °C under fully humidified donor-side inlet conditions.
Publication date
AffiliationNational Research Council Canada; NRC Institute for Fuel Cell Innovation
Peer reviewedNo
NPARC number8900961
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Record identifier1b8d0eb8-48f6-4c46-917c-7f448765c8d7
Record created2009-04-22
Record modified2016-05-09
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