Naslov
Electrochemical Hydrogen Pump for Recirculation of Hydrogen in a Fuel Cell Stack

Autori
Barbir, Frano ; Görgün, Haluk ; Wang, Xinting

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

Izvornik
207th Electrochemical Society Meeting Abstracts / - : The Electrochemical Society (ECS), 2005

Skup
207th Meeting of the Electrochemical Society

Mjesto i datum
Quebec, Kanada, 15.05.2005. - 20.05.2005

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
PEM fuel cell; hydrogen pump; hydrogen recirculation

Sažetak
Hydrogen may be pumped electrochemically across a proton exchange membrane if potential is applied. The process on the low pressure side is identical to the fuel cell anode process, i.e., hydrogen oxidation, and the process on the high pressure side is identical to the electrolyzer cathode, i.e., hydrogen evolution. Theoretically, electrochemical hydrogen pumping is equivalent to isothermal compression. Additional irreversible losses are due to activation concentration and due to ohmic resistance. In many closed-loop systems, hydrogen is operated in either a dead-end mode or in a recirculation mode. The latter results in somewhat improved performance, but it adds additional component (hydrogen recirculation pump) which also increases parasitic power consumption and reduces the system efficiency. A recirculation cell (or cells) may be included in a fuel cell stack and connected electrically in series with the active, current generating cells.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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