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ECN publication
Title:
Dynamic model of solid polymer fuel cell water management
 
Author(s):
 
Published by: Publication date:
ECN 1997
 
ECN report number: Document type:
ECN-RX--97-064 Article (scientific)
 
Number of pages:
17  

Published in: Submitted to Journal of power sources (), , , Vol., p.-.

Abstract:
For system simplicity, it is advantageous to operate the solid polymerfuel cell (SPFC) on dry gases at low overpressures. Under these conditions, water management inside the cell is a critical issue. To determine the effect of operating conditions on performance, a two-dimensional dynamic model is developed. Water balance equations are written for each membrane element taking into account: production, drag and diffusion of water in the membrane and diffusion of water vapour in the gas diffusion layers. The model can reasonably reproduce the polarisation curves of a cell operated on various oxygen fractions and can qualitatively describe the effect of various operating conditions (dry gases, current density level, co-and counter-flow, anode recirculation). 5 figs., 4 refs.


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