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FUEL CELL PLATE DESIGN FOR IMPROVED REACTANTS INTAKE

IP.com Disclosure Number: IPCOM000241100D
Publication Date: 2015-Mar-26
Document File: 1 page(s) / 263K

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FUEL CELL PLATE DESIGN FOR IMPROVED REACTANTS INTAKE

  Conventional plate design for cells in fuel cell stack are single direction flow - either co flow (fuel and air flow in same direction) or counter flow (fuel and air flow in opposite directions), For that reason the reactants concentration is the highest at the intake and concentration decreases along the flow channel, as shown in Error! Reference source not found.. At the outtake of the cell, reactants are depleted and catalyst at MEA is underutilized. Although only oxygen concentration graph is shown, hydrogen follows

the same logic.

Figure 1: Plate design and Oxygen concentration along the plate

Figure 2: Proposed plate design and Oxygen concentration along the plate

   Proposed solution for the plate (air and hydrogen) design incorporates additional manifolding and features to make fresh reactants delivery to the MEA more uniform. This solution would provide, on average, more uniform distribution of hydrogen and air along the MEA as shown in three segment example in Figure .

  Another possible solution that is slightly more complex would distribute manifold into smaller manifolds that feed only few channels each, as shown in Figure 1. More detailed air and fuel (hydrogen) intake is shown in Figure 1.

Figure 1: Distributed manifold solution

Figure 2: Detailed Air and fuel intake

Disclosed Anonymously