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Publication Citation: In-Situ Investigation of Water Transport in an Operating PEM Fuel Cell Using Neutron Radiography: Part 2 - Transient Water Accumulation in an Interdigitated Cathode Flow Field

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Author(s): Jon P. Owejan; T Trabold; David L. Jacobson; D Baker; Daniel S. Hussey; Muhammad Arif;
Title: In-Situ Investigation of Water Transport in an Operating PEM Fuel Cell Using Neutron Radiography: Part 2 - Transient Water Accumulation in an Interdigitated Cathode Flow Field
Published: July 27, 2007
Abstract: An interdigitated cathode flow field was tested in-situ with neutron radiography to measure the water transport through the porous gas diffusion layer in a PEM fuel cell. Constant current density to open circuit cycles were tested and the resulting liquid water accumulation and dissipation rates with in-plane water distributions are correlated to measured pressure differential between inlet and outlet gas streams. The effect of varying reactant gas relative humidity on liquid water accumulation is also demonstrated. These results provide evidence that reactant gas establishes a consistent in-plane transport path through diffusion layer and liquid water accumulates as a result of decreased pressure in these regions.
Citation: International Journal of Heat and Mass Transfer
Volume: 172
Pages: pp. 225 - 228
Keywords: fuel cell;interdigitated;neutron radiography;visualization;water management
Research Areas: Instrumentation, Fuel Cells
PDF version: PDF Document Click here to retrieve PDF version of paper (614KB)