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Research Papers

Parametric Sensitivity Tests—European Polymer Electrolyte Membrane Fuel Cell Stack Test Procedures

[+] Author and Article Information
Samuel Simon Araya

Department of Energy Technology,
Aalborg University,
Aalborg Øst 9220, Denmark
e-mail: ssa@et.aau.dk

Søren Juhl Andreasen

Department of Energy Technology,
Aalborg University,
Aalborg Øst 9220, Denmark
e-mail: sja@et.aau.dk

Søren Knudsen Kær

Department of Energy Technology,
Aalborg University,
Aalborg Øst 9220, Denmark
e-mail: skk@et.aau.dk

1Corresponding author.

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF FUEL CELL SCIENCE AND TECHNOLOGY. Manuscript received May 28, 2014; final manuscript received August 13, 2014; published online November 14, 2014. Editor: Nigel M. Sammes.

J. Fuel Cell Sci. Technol 11(6), 061007 (Dec 01, 2014) (7 pages) Paper No: FC-14-1067; doi: 10.1115/1.4028949 History: Received May 28, 2014; Revised August 13, 2014; Online November 14, 2014

As fuel cells are increasingly commercialized for various applications, harmonized and industry-relevant test procedures are necessary to benchmark tests and to ensure comparability of stack performance results from different parties. This paper reports the results of parametric sensitivity tests performed based on test procedures proposed by a European project, StackTest. The sensitivity of a Nafion®-based low temperature PEMFC stack's performance to parametric changes was the main objective of the tests. Four crucial parameters for fuel cell operation were chosen; relative humidity (RH), temperature, pressure, and stoichiometry at varying current density. Furthermore, procedures for polarization curve recording were also tested both in ascending and descending current directions.

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Figures

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Fig. 1

Effects of RH on stack performance for different load values. Solid lines show anode RH and dashed lines show cathode RH.

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Fig. 2

Deviation of RH values from set points

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Fig. 3

Measured temperatures at different load values. Solid lines show coolant inlet temperature and dashed lines show the coolant outlet temperature.

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Fig. 4

Effects of temperature on stack performance at different load values

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Fig. 5

Effects of pressure on stack performance at varying current densities

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Fig. 6

Effects of fuel stoichiometry on stack performance at different load values

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Fig. 7

Effects of oxidant stoichiometry on stack performance at different load values

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Fig. 8

Polarization curves at different operating conditions, measured both in descending and ascending current directions

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Fig. 9

Measurements conducted according to the StackTest project's proposed measurement steps for polarization curves

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Fig. 10

All three polarization curves. A, B, and C refer to the three different curves in Fig. 8.

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