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Fuel Cells
book

Fuel Cells

by Shripad T. Revankar, Pradip Majumdar
May 2014
Beginner to intermediate content levelBeginner to intermediate
748 pages
23h 13m
English
CRC Press
Content preview from Fuel Cells
378 Fuel Cells
9.3.1.7 Water Content in Naon—PEM
The water-absorbing capacity of a material is in general expressed in the
form of sorption isotherms as a function of humidity condition and tempera-
ture. The water content (λ) is dened as the ratio of number of water mole-
cules to number of charged sites
SO H
3
−+
()
. Sorption isotherm for Naon-117
was measured experimentally based on humidity condition at 30°C and the
empirical correlation is given by Zawodzinski et al. (1991) (Springer et al.,
1991) in the form of water content (λ) as a function of water vapor activity (a).
The functional form of the sorption isotherm is given as follows
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Publisher Resources

ISBN: 9781420089684