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Technical Briefs

Experimental Investigation of Irreversibility of a Proton Exchange Membrane Fuel Cell

[+] Author and Article Information
I. Khazaee1

 Department of Mechanical Engineering, Torbat-e-jam branch, Islamic Azad University, Torbat-e-jam, Iran P.O. Box 9177948944-1111Imankhazaee@yahoo.com

1

Corresponding author.

J. Energy Resour. Technol 134(2), 024502 (Apr 04, 2012) (5 pages) doi:10.1115/1.4006045 History: Received June 07, 2011; Revised December 23, 2011; Published April 02, 2012; Online April 04, 2012

For an 11 W proton exchange membrane (PEM) fuel cell, the exergy analysis at different channel geometry and internal parameters such as temperature, pressure, and mass flow rate are investigated experimentally. The geometry of the cell is rectangular, elliptical, and triangular. A PEM fuel cell with 25cm2 active area and Nafion 117 membrane with 4 mg Pt cm-2 for the anode and cathode is employed as a membrane electrode assembly. The results show that when the geometry of the cell is rectangular, the irreversibility of the cell is at lower value and the exergy efficiency is at higher value. Also, the results show that with the increase of hydrogen, oxygen, and cell temperature, the exergy efficiencies of the cell increase and irreversibilities decrease.

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Copyright © 2012 by American Society of Mechanical Engineers
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Figures

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Figure 1

Schematic of the channels PEMFC for (a) rectangular channel (b) triangular channel, and (c) elliptical channel

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Figure 2

Schematic of the experimental setup

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Figure 3

Variation of (a) irreversibilities and (b) exergy efficiencies at Tcell  = 60 °C, TH2 = 55 °C, TO2 = 55 °C, m·H2 = 0.3 L/min, P = 2.905 bar, and m·O2 = 0.5 L/min

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Figure 4

Variation of (a) irreversibilities and (b) exergy efficiencies for hydrogen flow rate at Tcell  = 60 °C, TH2 = 55 °C, TO2 = 55 °C, m·O2 = 0.5 L/min, m·H2 = 0.7 L/min, and P = 2.905 bar

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Figure 5

Variation of (a) irreversibilities and (b) exergy efficiencies for cell temperature at Tcell  = 50 °C, TH2 = 45 °C, TO2 = 55 °C, m·O2 = 0.5 L/min, m·H2 = 0.3 L/min, and P = 2.905 bar

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