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http://dx.doi.org/10.3795/KSME-B.2014.38.8.687

Experimental Study of Polymer Electrolyte Membrane Fuel Cell Performance Under Low Operating Temperatures  

Cha, Dowon (Dept. of Mechanical Engineering, Korea Univ.)
Kim, Bosung (Dept. of Mechanical Engineering, Korea Univ.)
Kim, Yongchan (Dept. of Mechanical Engineering, Korea Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.38, no.8, 2014 , pp. 687-693 More about this Journal
Abstract
In this study, the performance characteristics of a polymer electrolyte membrane fuel cell (PEMFC) were investigated at low operating temperatures under steady-state and dynamic conditions. The performance of the PEMFC was analyzed according to the external humidifying rate and air stoichiometry. The ohmic resistance was also investigated using EIS tests. At the operating temperature of $35^{\circ}C$, voltage fluctuation occurred to a greater degree compared to that at $45^{\circ}C$. Therefore, it was found that the air stoichiometry should be higher than 2.5 for the stable operation of the fuel cell. In addition, the relative humidity of the reactant gases should be higher than 60 to reduce the ohmic resistance.
Keywords
Dynamic Characteristics; Lower Operating Temperature; PEMFC; Performance;
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