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Transcript 
Date of download: 8/9/2017
Copyright © ASME. All rights reserved.
From: Experimental Analysis of Water Vapor Diffusion Through Porous Membranes in a Proton Exchange
Membrane Fuel Cell
J. Heat Transfer. 2015;137(12):121005-121005-8. doi:10.1115/1.4030921
Figure Legend:
Schematic of (a) the flow-field plate (width (2 mm) × depth (4 mm)) with the test channel labeled and (b) the experimental setup
Date of download: 8/9/2017
Copyright © ASME. All rights reserved.
From: Experimental Analysis of Water Vapor Diffusion Through Porous Membranes in a Proton Exchange
Membrane Fuel Cell
J. Heat Transfer. 2015;137(12):121005-121005-8. doi:10.1115/1.4030921
Figure Legend:
Wavelength of the laser beam as a function of laser temperature and current
Date of download: 8/9/2017
Copyright © ASME. All rights reserved.
From: Experimental Analysis of Water Vapor Diffusion Through Porous Membranes in a Proton Exchange
Membrane Fuel Cell
J. Heat Transfer. 2015;137(12):121005-121005-8. doi:10.1115/1.4030921
Figure Legend:
(a) A sample IR thermograph. (b) The spatial variation of membrane surface temperature at two values of p hi. (c) Locations of the
thermocouples on the humid side and the dry side and (d) temporal variation of the air temperature in the channel (thermocouple
location as shown in (a)) and at the outlet of the cell for the two sides. Dry air inlet temperature is always at room temperature
(25 °C) and humid air inlet temperature steady-state value is 72 °C and these are not presented in the figure for clarity.
Date of download: 8/9/2017
Copyright © ASME. All rights reserved.
From: Experimental Analysis of Water Vapor Diffusion Through Porous Membranes in a Proton Exchange
Membrane Fuel Cell
J. Heat Transfer. 2015;137(12):121005-121005-8. doi:10.1115/1.4030921
Figure Legend:
(a) Absorption profiles of water vapor at different partial pressures. (b) Cartoon showing the measurement details of FWHM of an
absorption profile for obtaining the calibration curve. (c) Calibration curve.
Date of download: 8/9/2017
Copyright © ASME. All rights reserved.
From: Experimental Analysis of Water Vapor Diffusion Through Porous Membranes in a Proton Exchange
Membrane Fuel Cell
J. Heat Transfer. 2015;137(12):121005-121005-8. doi:10.1115/1.4030921
Figure Legend:
Decrease in water vapor partial pressure as a function of phi for GDL in (a) humid side and (b) dry side
Date of download: 8/9/2017
Copyright © ASME. All rights reserved.
From: Experimental Analysis of Water Vapor Diffusion Through Porous Membranes in a Proton Exchange
Membrane Fuel Cell
J. Heat Transfer. 2015;137(12):121005-121005-8. doi:10.1115/1.4030921
Figure Legend:
Water vapor partial pressures at the humid side and the dry side for different values of p hi for case 2
Date of download: 8/9/2017
Copyright © ASME. All rights reserved.
From: Experimental Analysis of Water Vapor Diffusion Through Porous Membranes in a Proton Exchange
Membrane Fuel Cell
J. Heat Transfer. 2015;137(12):121005-121005-8. doi:10.1115/1.4030921
Figure Legend:
Decrease in water vapor partial pressure as a function of phi for MEA in humid side
Date of download: 8/9/2017
Copyright © ASME. All rights reserved.
From: Experimental Analysis of Water Vapor Diffusion Through Porous Membranes in a Proton Exchange
Membrane Fuel Cell
J. Heat Transfer. 2015;137(12):121005-121005-8. doi:10.1115/1.4030921
Figure Legend:
(a) Results from the SAXS carried out on the MEA for dry and wet conditions (q is called scattering vector) (Courtesy: Dr. Debasis
Sen from BARC). (b) SEM image of GDL (pore size ∼50–200 μm) (equivalent pore diameter is calculated using Huebscher equation
given by d = 1.30 × ((a × b)0.625/(a + b)0.25)).
Date of download: 8/9/2017
Copyright © ASME. All rights reserved.
From: Experimental Analysis of Water Vapor Diffusion Through Porous Membranes in a Proton Exchange
Membrane Fuel Cell
J. Heat Transfer. 2015;137(12):121005-121005-8. doi:10.1115/1.4030921
Figure Legend:
Comparison of mass flux between MEA and GDL as a function of p hi. For MEA, it is mass depletion rate.
Date of download: 8/9/2017
Copyright © ASME. All rights reserved.
From: Experimental Analysis of Water Vapor Diffusion Through Porous Membranes in a Proton Exchange
Membrane Fuel Cell
J. Heat Transfer. 2015;137(12):121005-121005-8. doi:10.1115/1.4030921
Figure Legend:
Schematic showing water transport from humid side for (a) GDL and (b) MEA
Date of download: 8/9/2017
Copyright © ASME. All rights reserved.
From: Experimental Analysis of Water Vapor Diffusion Through Porous Membranes in a Proton Exchange
Membrane Fuel Cell
J. Heat Transfer. 2015;137(12):121005-121005-8. doi:10.1115/1.4030921
Figure Legend:
Diffusion coefficients at different phi for (a) GDL and (b) MEA
Date of download: 8/9/2017
Copyright © ASME. All rights reserved.
From: Experimental Analysis of Water Vapor Diffusion Through Porous Membranes in a Proton Exchange
Membrane Fuel Cell
J. Heat Transfer. 2015;137(12):121005-121005-8. doi:10.1115/1.4030921
Figure Legend:
Water absorbed by the MEA at different phi
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