Title: Identification of critical parameters for PEMFC stack performance characterization and control strategies for reliable and comparable stack benchmarking
Authors: MITZEL JensGÜLZOW ErichKABZA AHUNGER JARAYA SPIELA PiotrALECHA ITSOTRIDIS Georgios
Citation: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY vol. 41 no. 46 p. 21415-21426
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Publication Year: 2016
JRC N°: JRC100043
ISSN: 0360-3199
URI: http://www.sciencedirect.com/science/article/pii/S0360319916324235
http://publications.jrc.ec.europa.eu/repository/handle/JRC100043
DOI: 10.1016/j.ijhydene.2016.08.065
Type: Articles in periodicals and books
Abstract: This paper is focused on the identification of critical parameters and on the development of reliable methodologies to achieve comparable benchmark results. Possibilities for control sensor positioning and for parameter variation in sensitivity tests are discussed and recommended options for the control strategy are summarized. This ensures result comparability as well as stable test conditions. E.g., the stack temperature fluctuation is minimized to about 1 C. The experiments demonstrate that reactants pressures differ up to 12 kPa if pressure control positions are varied, resulting in an average cell voltage deviation of 21 mV. Test parameters simulating different stack applications are summarized. The stack demonstrated comparable average cell voltage of 0.63 V for stationary and portable conditions. For automotive conditions, the voltage increased to 0.69 V, mainly caused by higher reactants pressures. A benchmarking concept is introduced using “steady-state” polarization curves. The occurring 20 mV hysteresis effect between the ascending and descending polarization curve can be corrected calculating the mean value of both voltages. This minimizes the influence of preceding load levels, current set points, and dwell times.
JRC Directorate:Energy, Transport and Climate

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