
441Fuel Cell Stack, Bipolar Plate, and Gas Flow Channel
10.6.2.3 Multiple Parallel Serpentine Channels with Square Bends
Since the serpentine channel with square bends provides a more effective
contact area, multiple parallel serpentine channels are considered with
square bends in order to take advantage of increased contact area as well as
decreased pressure drop because of the parallel nature of the ow as shown
in Figure 10.12d.
By decreasing the channel size from 2 mm to 1 mm, the number of dual
channels and the ratio of gas contact area to land area can be progressively
increased considerably as shown in Figure 10.12d through 10.12f. A h ...