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Modeling and validation of fuel cell water dynamics using neutron imaging

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3 Author(s)
Siegel, J.B. ; Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI ; McKay, D.A. ; Stefanopoulou, A.G.

Using neutron imaging, the mass of liquid water within the gas diffusion layer and flow channels of an operating polymer electrolyte membrane fuel cell (PEMFC) is measured under a range of operating conditions. Between anode purge events, it is demonstrated that liquid water accumulates and is periodically removed from the anode gas channels; this event is well correlated with the dynamic cell voltage response. The estimation of flooding and cell performance is achieved by a spatially distributed (through-membrane plane), temporally-resolved, and two-phase (liquid and vapor) water model. Neutron imaging techniques have never before been applied to characterize flooding with a dead-ended anode and elucidate important issues in water management as well as provide a means for calibrating and validating a dynamic lumped parameter fuel cell model.

Published in:

American Control Conference, 2008

Date of Conference:

11-13 June 2008