FUEL DELIVERY SYSTEM FOR FUEL CELL STACKS

摘要

Fuel cell stacks with improved efficiencies in comparison with conventional designs are disclosed. A fuel delivery system (62-68) delivers fuel to a given cell or group of cells (54), followed by delivery to another cell or group of cells downstream from the first cell or group of cells to provide serial fuel flow to the cells. The fuel preferably flows in a direction perpendicular to the axial direction of the cells to create a cross flow pattern. With such a serial-flow fuel delivery system, the Nernst potential for the downstream cells or stacks is higher than it would be in a conventional parallel-flow system, allowing for a higher cell voltage at a given current density.