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Research Papers

Evaluation of the Performance Characteristics of a Direct Methanol Fuel Cell With Multifuels

[+] Author and Article Information
Sujith Mohan, S. O. Bade Shrestha

Department of Mechanical and Aeronautical Engineering, Western Michigan University, Kalamazoo, MI 49008-5343

J. Fuel Cell Sci. Technol 7(4), 041018 (Apr 09, 2010) (5 pages) doi:10.1115/1.4000688 History: Received July 27, 2009; Revised August 06, 2009; Published April 09, 2010; Online April 09, 2010

Direct methanol fuel cells are one of the alternate power sources for the field of power electronics because of their high energy density. The benefits of a fuel cell toward the environment can be greatly improved if the fuel used for its application comes from renewable sources. In this study, the performance of a direct methanol fuel cell was investigated under five different methanol concentrations. The effect of methanol concentration on the cell operating temperature is studied. Impedance spectroscopy was conducted to measure the ohmic, activation, and mass transport losses for all concentrations. The cell performance was evaluated using methane and ethanol fuels and this was compared with methanol operation.

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Copyright © 2010 by American Society of Mechanical Engineers
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Figures

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Figure 1

Photograph of a DMFC and a test station

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Figure 2

V-I curve showing the effect of methanol concentration

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Figure 3

Power density curves showing the effect of concentration

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Figure 4

Variation in mean response voltage with temperature at increasing concentrations

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Figure 5

Typical Nyquist plot (6)

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Figure 6

Nyquist plot generated for a 0.25 M methanol concentration

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Figure 7

Interaction plot for mass transport losses

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Figure 8

Methane as a fuel in a DMFC

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Figure 9

V-I curve showing the effect of ethanol concentration

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Figure 10

Power density curves showing the effect of ethanol concentration

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Figure 11

Nyquist plot generated for a 2 M ethanol concentration

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