In-Situ Investigation of Water Transport in an Operating PEM Fuel Cell Using Neutron Radiography: Part 1 - Experimental Method and Serpentine Flow Field Results
T Trabold, Jon P. Owejan, David L. Jacobson, P R. Huffman
Effective management of liquid water produced in the cathodic reaction of a polymer electrolyte membrane (PEM) fuel cell is essential to achieve high cell efficiency. Few experimental methods are available for in-situ measurements of water transport within an operating cell. However, neutron radiography is an useful tool to interrogate for water within a cell constructed of many common materials, including metals. The application of neutron radiography to measurements of water content within the flow field channels of an operating 50 cm2 PEM fuel cell is described. Details of the specialized experimental apparatus, image processing procedure and quantitative analysis are provided. It is demonstrated that water tended to accumulate in the 180 bends of the serpentine anode and cathode flow fields used in this study. Moreover, the effects of both the current density and cathode stoichiometric ratio on the quantity of accumulated water are discussed.
International Journal of Heat and Mass Transfer
fuel cell, neutron radiography, PEM, two-phase flow, water management
, Owejan, J.
, Jacobson, D.
and Huffman, P.
In-Situ Investigation of Water Transport in an Operating PEM Fuel Cell Using Neutron Radiography: Part 1 - Experimental Method and Serpentine Flow Field Results, International Journal of Heat and Mass Transfer
(Accessed December 11, 2023)