Naslov
Design and Characterization of a Passive Air-Breathing PEMFC Stack

Autori
Görgün, Haluk ; Barbir, Frano

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
First European Fuel Cell Technology and Applications Conference

Mjesto i datum
Rim, Italija, 14.12.2005. - 16.12.2005

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
passive fuel cell; air-breathing fuel cell; natural convection; transient loads

Sažetak
A two-cell PEMFC stack has been designed, assembled and tested. The two 10-cm2 cells are assembled in such a manner that the cathodes are facing outwards to ambient air, and the anodes are facing inward to the hydrogen compartment. The cells are electrically connected in series. After initial break-in period, the stack exhibited very stable performance in completely passive conditions at currents up to 0.1 A/cm2. The only control feature and system component is the hydrogen pressure regulator. Dead-end operation excludes hydrogen humidification, otherwise the anode compartment would flood with condensed water. Humidification of the membrane is accomplished by back-diffusion. Because of that, a very thin composite membrane has been selected. Expectedly, the stack was sensitive to any air movement, however it was not sensitive to orientation. The passive stack also has very good response to transient loads. The results of stack testing/characterization will be presented, as well as the result of the modeling efforts. This concept will be expanded to hot-swappable multi-stack configuration up to 20 W. Equipped with a metal hydride bottle it is intended for portable small power applications.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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