Multiphase Simulations and Design of Validation Experiments for Proton Exchange Membrane Fuel Cells

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Abstract

Proton exchange membrane fuel cells directly convert into electricity the chemical energy of hydrogen and oxygen from air. The by-products are just water and waste heat. Depending on the operating conditions the water may be in the liquid or gas phase, and liquid water can hence plug the porous media in the fuel cell, and, more importantly, the flow channels and outlet ports of a single cell in a stack. These problems may be avoided if the fuel cell operates in a way that both the anode and cathode outlet stream are exactly fully humidified, i.e. the relative humidity is at 100 %. Such operation can conceivably be obtained by adjusting the operating conditions using dew point diagrams. In this paper numerical results will be presented of two different flow field arrangements, both using the interdigitated flow field. It will be shown that arranging the gas streams in a counter-flow, “x-flow” modus is the preferred option. Moreover, a detailed analysis of the preferred channel width and land area shows that the finest pitch is predicted to yield the highest membrane hydration levels and is thus preferred.
Original languageEnglish
Title of host publicationProceedings of the ASME 2013 Fluids Engineering Division Summer Meeting : FEDSM 2013
Number of pages8
PublisherAmerican Society of Mechanical Engineers
Publication date2013
ISBN (Print)978-0-7918-5556-0
DOIs
Publication statusPublished - 2013
EventASME 2013 Fluids Division Summer Meeting, FEDSM 2013 - Incline Village, Nevada, United States
Duration: 7 Jul 201311 Jul 2013

Conference

ConferenceASME 2013 Fluids Division Summer Meeting, FEDSM 2013
Country/TerritoryUnited States
CityIncline Village, Nevada
Period07/07/201311/07/2013
SeriesASME Fluids Engineering Division
ISSN0888-8116

Keywords

  • Design
  • Engineering simulation
  • Proton exchange membrane fuel cells

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