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Research Papers

Macroscopic Modeling of a PEFC System Based on Equivalent Circuits of Fuel and Oxidant Supply

[+] Author and Article Information
Daniela Chrenko1

Laboratory of Electrical Engineering and Systems (L2ES), Joint Research Unit, University of Franche-Comté/University of Technology of Belfort Montbeliard, EA 3898, L2ES-UTBM, 90010 Belfort Cedex, France

Marie-Cécile Péra

Laboratory of Electrical Engineering and Systems (L2ES), Joint Research Unit, University of Franche-Comté/University of Technology of Belfort Montbeliard, EA 3898, L2ES-UTBM, 90010 Belfort Cedex, France

Daniel Hissel

Laboratory of Electrical Engineering and Systems (L2ES), Joint Research Unit, University of Franche-Comté/University of Technology of Belfort Montbeliard, EA 3898, L2ES-UTBM, 90010 Belfort Cedex, Francedaniela.chrenko@utbm.fr

Martin Geweke

 Hamburg University of Applied Science, Lohbrugger Kirchenstrasse 65, 22607 Hamburg, Germany

1

Corresponding author.

J. Fuel Cell Sci. Technol 5(1), 011015 (Feb 04, 2008) (8 pages) doi:10.1115/1.2786471 History: Received October 03, 2006; Revised January 16, 2007; Published February 04, 2008

In this paper, a polymer electrolyte fuel cell system is modeled in order to investigate the following operational modes: transient and nominal operations and rejuvenation process. As a preliminary investigation, the Ballard NEXA™ power module performances are experimentally characterized. The power consumptions of ancillaries, such as the air fan, are then evaluated to investigate the system. To achieve an overall system model, components, such as the compressor, the pipes, the valves, the expander, and the humidifier, are then simulated. This simulation is based on the same assumption: Fluidic circuits are described by an electrical analogy. The anodic gas management is finally described according to the delivered output current.

Copyright © 2008 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Schematic of an FC system. In the studied system, the output power is unregulated (without power converter).

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Figure 2

Average of all polarization curves obtained by measurements

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Figure 3

Temperature evolution of the FC system versus delivered current

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Figure 4

Power distribution of the system

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Figure 5

NEXA™ power module

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Figure 6

Contribution of components to the internal power losses

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Figure 7

Hydrogen consumption by the FC system

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Figure 8

System efficiency

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Figure 9

Purge cell voltage compared to polarization curve

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Figure 10

Time between purging for different currents

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Figure 11

Polarization curve before and after rejuvenation

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Figure 12

The system rejuvenation process

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Figure 13

Electrical analog modeling approach

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Figure 14

Description of the system simulation

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Figure 15

Air side modules

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Figure 16

Nomenclature of flows inside the humidity exchanger

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Figure 17

Different cases of humidity exchange

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Figure 18

Simulated and measured polarization curve

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Figure 19

Simulated and measured powers

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Figure 20

Simulated and measured system efficiency

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Figure 21

Mass flows in the humidity exchanger

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Figure 22

Simulated and measured step load behavior

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