A Numerical Investigation of Effects of Methanol Concentration Fluctuation in Active-type Direct Methanol Fuel Cell (DMFC) Systems
2013
In this study, we develop a one-dimensional (1-D), two-phase, transient-thermal DMFC model to
investigate the effect of methanol concentration fluctuation that usually occurs in active-type direct methanol fuel
cell (DMFC) systems. 1-D transient simulations are conducted and time-dependent behaviors of DMFCs are
analyzed under various DMFC operating conditions such as anode/cathode stoichiometry, cell temperature, and
cathode inlet humidification. The simulation results indicate that the effect of methanol concentration fluctuation
on DMFC performance can be mitigated by proper control of anode/cathode stoichiometry, providing a guideline
to optimize operating conditions of active DMFC systems.
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