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Experimental analysis of spatio-temporal behavior of anodic dead-end mode operated polymer electrolyte fuel cell
- Source :
- IndraStra Global.
- Publication Year :
- 2011
-
Abstract
- During the anodic dead-end mode operation of fuel cells, the inert gases (nitrogen and water) present in the cathode side gas channel permeate to the anode side and accumulate in the anode gas channel. The inert gas accumulation in the anode decreases the fuel cell performance by impeding the access of hydrogen to the catalyst. The performance of fuel cell under potentiostatic dead-end mode operation is shown to have three distinct regions viz. time lag region, transient current region and a steady state current region. A current distribution measurement setup is used to capture the evolution of the current distribution as a function of time and space. Co- and counter-flow operations of dead-end mode confirm the propagation of inert gas from the dead-end of anode channel to the inlet of anode. Experiments with different oxidants, oxygen and air, under dead-end mode confirm that nitrogen which permeates from cathode to anode causes the performance drop of the fuel cell. For different starting current densities of 0.15 A cm-2, 0.3 A cm-2 and 0.6 A cm-2 the inert gas occupies 35%, 45% and 57%, respectively of anode channel volume at the end of 60 min of dead-end mode operation. � 2011 Elsevier B.V. All rights reserved.
- Subjects :
- Steady state
Hydrogen
Renewable Energy, Sustainability and the Environment
Chemistry
Analytical chemistry
Energy Engineering and Power Technology
chemistry.chemical_element
Electrolyte
Anode channels
Anode gas
Anode side
Anodic dead-end mode
Current distribution
Current distribution measurement
Experimental analysis
Fuel cell performance
Function of time
Gas accumulation
Gas channels
Mode operation
Nitrogen accumulation
Polymer electrolyte fuel cells
Potentiostatics
Spatio-temporal
Spatiotemporal behaviors
Steady-state currents
Time lag
Transient current
Cathodes
Electric current distribution measurement
Fuel cells
Inert gases
Inlet flow
Nitrogen
Power quality
Gas fuel analysis
Cathode
law.invention
Anode
Volume (thermodynamics)
law
Electrical and Electronic Engineering
Physical and Theoretical Chemistry
Current (fluid)
Inert gas
Subjects
Details
- Language :
- English
- ISSN :
- 23813652
- Database :
- OpenAIRE
- Journal :
- IndraStra Global
- Accession number :
- edsair.doi.dedup.....056df56b7ebe96fd00fc710d1604b2ee