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07/15/10 5:11 PM

#17512 RE: tonycajjo #17511

SYMW...The FE DMFC has several other advantages over the PEM DMFC. The most important is superior startup and shutdown performance. When the FE DMFC is shut down the electrolyte is drained from the cell thereby shutting down the fuel cell with no residual voltages. The PEM DMFC shuts down with high voltages present causing degradation of expensive catalysts and other components. The FE DMFC also shows much more constant voltage over its output range than the PEM DMFC, which experiences voltage drop at high output.

FRIED

07/15/10 5:18 PM

#17513 RE: tonycajjo #17511

From the Carleton U website

It says here "long-term collaboration". What I don't get is that they never mention SYMW but they do mention PPS/HET... What's PPS/HET?

" Besides the flowing electrolyte management, the FE-DMFC unit also includes management systems for the methanol fuel and the air. All systems are integrated using a central control unit. The energy requirements for all three systems should be addressed as well. It is also anticipated that the performance of individual or stacked fuel cells will be different, mainly due to heat transfer and fluid-dynamic effects. The substitution or elimination of PEM (Nafion 117 as seen in Figure 2) will be addressed. The ultimate goal of the long-term collaboration between PPS/HET and Carleton University is the commercialization of FE-DMFCs. Starting from a 5-W prototype, which is currently available, comprehensive studies will be performed and a scale-up to a 50-W-stack FE- DMFC will be developed in this proposal."