Flow field geometries for improved water management

Details Flow field geometries for improved water management Flow field geometries for improved water management

2006-08-08

2006-08-08

Ryan, Patrick Joseph (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

C429S006000, C429S006000, C429S010000

Reexamination Certificate

active

07087337

ABSTRACT:
An assembly for a fuel cell including an electrically conductive fluid distribution element including a flow field disposed on a surface of the element, wherein the flow field includes a plurality of channels for carrying the gaseous reactants of the fuel cell. The assembly also includes an electrically conductive member disposed at the surface of the element to serve as a gas diffusion media. The channels of the element include a plurality of sidewalls formed in various orientations, and the orientations of the side-walls form a cross-sectional geometry of the channel such that water collection regions are formed at an interface of the electrically conductive fluid distribution element and the electrically conductive member, and at a bottom portion of the channel.

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Akbar, M.K., Plummer, D.A. and Ghiaasiaaan, S.M., “On gas-liquid two-phase flow regimes in microchannels,” Int. J. Multiphase Flow, vol. 29, 855-865 (2003).
Wilkinson, D.P. and Vanderleeden, O., “Serpentine flow field design,” Chapter 30 in Handbook of Fuel Cells—Fundamentals, Technology and Applications, W. Vielstich et al. (Eds.), John Wiley & Sons, Ltd. (2003).

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