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Evolution of the current density distribution in PEMFC during drying and wetting processes

Garcia Sanchez, Daniel and Gülzow, Erich and Friedrich, K. Andreas (2012) Evolution of the current density distribution in PEMFC during drying and wetting processes. 2nd Ertl Symposium, 24-27 June 2012, Stuttgart, Germany.

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Abstract

Polymer electrolyte membrane fuel cells (PEMFC) are expected to be an interesting alternative as power supply in portable, applications because of their high power density and low environmental impact. From the technical side, water management is one of the most important issues for the successful operation, performance and durability of the PEMFC. Drying Processes The same flow value is imposed for the anode and cathode. In these way, the water uptake of dry gasses is the same at both sides. Current density evolution plots, figure 1, show the reduction of the local current density (blue line), starting at the cathode inlet. Wetting processes. There are some differences in the cell response depending on the hydration of the cell compartment cathode or anode. The hydration of the cathode involve a faster cell response and an uniform surface activation in the cell, red line in figure 2, while the hydration of the anode produces a slower response, and the activation surface shows an activation front starting at the anode inlet, blue line figure 2.

Item URL in elib:https://elib.dlr.de/79316/
Document Type:Conference or Workshop Item (Poster)
Title:Evolution of the current density distribution in PEMFC during drying and wetting processes
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Garcia Sanchez, DanielDaniel.GarciaSanchez (at) dlr.deUNSPECIFIED
Gülzow, ErichDLRUNSPECIFIED
Friedrich, K. AndreasDLRUNSPECIFIED
Date:June 2012
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Keywords:Polymer electrolyte, Fuel cell, Water management.
Event Title:2nd Ertl Symposium
Event Location:Stuttgart, Germany
Event Type:international Conference
Event Dates:24-27 June 2012
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion and Use (old)
HGF - Program Themes:Fuel Cells (old)
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Elektrochemische Prozesse (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Garcia Sanchez, Dr Daniel
Deposited On:05 Dec 2012 14:06
Last Modified:31 Jul 2019 19:38

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