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Dynamic response of the direct methanol fuel cell under variable load conditions

Lookup NU author(s): Dr Panagiotis Argyropoulos, Emeritus Professor Keith Scott, Dr Wathiq Taama

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Abstract

The transient response of the direct methanol fuel cell (DMFC) is of paramount importance when it is used for transportation applications. With the aid of a computer-controlled load unit we have applied a variety of loading cycles on a small-scale single DMFC in order to evaluate the effect of the loading pattern and operating conditions on the cell's response time and performance. The cell responds rapidly, and reversibly, to changes in magnitude and rate of change of load. Under dynamic operation the cell voltage response can be significantly better than that achieved under steady state operation. Open circuit potentials are also increased, by up to 100 mV, by imposing a dynamic loading strategy. This improvement, accredited, in part, to a reduction in the effect of methanol crossover, is potentially attractive in vehicle applications where higher power density and fuel efficiency can be realized.

Publication metadata

Author(s): Argyropoulos P, Scott K, Taama WM

Publication type: Article

Publication status: Published

Journal: Journal of Power Sources

Year: 2000

Volume: 87

Issue: 1

Pages: 153-161

ISSN (print): 0378-7753

ISSN (electronic): 1873-2755

Publisher: Elsevier

URL: http://dx.doi.org/10.1016/S0378-7753(99)00475-9

DOI: 10.1016/S0378-7753(99)00475-9

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