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Research Papers

Experimental Study on Estimation Method of Flooding Phenomenon at the Cathode Channel in the Proton Exchange Membrane Fuel Cell

[+] Author and Article Information
Seong-Ho Han

Power & Industrial Systems R&D Center,
Hyosung Corporation,
Gyeonggi-Do 431-080, Republic of Korea
e-mail: hshfc@hyosung.com

Deuk Kuen-Ahn

Advanced Technology Center,
Hyundai-KIA Motors,
Gyeonggi-Do 446-912, Republic of Korea
e-mail: dkAhn@hyundai.com

Young-Don Choi

Department of Mechanical Engineering,
Korea University,
Seoul 136-713, Republic of Korea
e-mail: ydchoi@korea.ac.kr

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 23, 2012; final manuscript received September 24, 2013; published online December 5, 2013. Editor: Nigel M. Sammes.

J. Fuel Cell Sci. Technol 11(2), 021005 (Dec 05, 2013) (10 pages) Paper No: FC-12-1043; doi: 10.1115/1.4025906 History: Received May 23, 2012; Revised September 24, 2013

The paper investigates the effects of the dimensionless number flooding number that can exactly predict the flooding phenomenon in the cathode channel. Experiments were carried out at 0, 50, and 90% relative humidity and at 50 and 60 °C cell temperature respectively. The experiment gave a dimensionless number that could effectively predict the flooding effect in the cathode channel of the PEM fuel cell. As the study was performed the factors such as temperature and relative humidity that influenced the dimensionless number, the results verified the dimensionless number. These results have been connected to the cathode channel flooding. The influences of outlet temperature and relative humidity on flooding at different levels of current density are discussed.

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Figures

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Fig. 1

Experimental apparatus of fuel cell system

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Fig. 2

Flow-field of the unit cell, curved duct with one channel: (i) cathode channel: width 1 mm, depth 0.9 mm, rib 0.9 mm; (ii) anode channel: width 1 mm, depth 0.7 mm, rib 0.9 mm

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Fig. 3

Experiment device of the chamber of the VAISALA hygrometer

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Fig. 4

Schematic of the chamber of the VAISALA hygrometer

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Fig. 13

Differential pressure as a function of times of current density 1.4 A/cm2 at case IV

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Fig. 12

Voltage and dimensionless number as a function of times at different current density in case IV (cathode stoichiometry 2.0, anode stoichiometry 1.5): (a) variation of the cell voltage; (b) variation of the dimensionless number, FN

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Fig. 11

Voltage and dimensionless number as a function of times at different current density in case II: (a) variation of the cell voltage; (b) variation of the dimensionless number, FN

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Fig. 10

Voltage and dimensionless number as a function of times at different current density in case I: (a) variation of the cell voltage; (b) variation of the dimensionless number, FN

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Fig. 9

Outlet temperature of the cathode as a function of times at different current density (cathode stoichiometry 2.0, anode stoichiometry 1.5); (a) case I; (b) case II

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Fig. 8

Voltage and dimensionless number as a function of times at different current density in case V: (a) variation of the cell voltage; (b) variation of the dimensionless number, FN

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Fig. 7

Dimensionless number of the cathode outlet depending on the difference between constant relative humidity and variable relative humidity: (a) case V current density i = 0.4 A/cm2; (b) case V current density i = 0.9 A/cm2

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Fig. 6

Humidity ratio of the cathode outlet depending on the difference between constant relative humidity and variable relative humidity (cathode stoichiometry 2.0, anode stoichiometry 1.5). (a) Case V current density i = 0.4 A/cm2; (b) case V current density i = 0.9 A/cm2.

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Fig. 5

Relative humidity of the cathode outlet as a function of times at different current density in case II (cathode stoichiometry 2.0, anode stoichiometry 1.5)

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