Abstract
n this study in-situ measurements of water vapor and oxygen concentration in gas flow channels in an operating polymer electrolyte membrane fuel cell (PEMFC) are obtained using Tunable Diode Laser Absorption Spectroscopy (TDLAS). Wavelengths of the diode laser are 1392nm for measurement of water vapor concentration and 760nm for measurement of oxygen concentration, respectively. It was successfully demonstrated that the optical remote sensing based on TDLAS techniques can detect local variations of oxygen and water vapor concentration in the channel of a PEMFCs under load.
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