The characterization of the indirect methanol fuel cell (IMFC) system is done using the simulation model developed by the Fuel Cell Vehicle Modeling Program (FCVNT) at the University of California - Davis. The basic components that exist within the model as well as the interactions between those components are investigated with respect to how they affect the steady state and dynamic operation of the system. By investigating the steady state efficiencies, the authors find that the normalized peak efficiency for the system occurs around 5 % of full power. This implies that, similar to the direct hydrogen system, low power operation will provide better system efficiency compared to higher power operation. While this tends to hold true, the magnitude of the benefit is unclear because steady state efficiencies can be misleading. For this reason, the dynamic efficiency of the system is analyzed over two drive cycles, the FUDS and the US06. Here the authors find that the dynamic efficiency is significantly below the expected steady state efficiency. For the system modeled, the dynamic efficiency is 10 % lower than the steady-state efficiency on the FUDS and 14 % lower for the US06 cycle. By investigating second by second averaged dynamic efficiency values of each component, the authors find that the reduced dynamic efficiency can be primarily attributed to the fuel processor.
Simulation and performance of an indirect methanol PEM fuel cell system
Simulation und Leistung eines indirekten PEM-Methanol-Brennstoffzellensystems
2000
12 Seiten, 10 Bilder, 9 Quellen
(nicht paginiert)
Aufsatz (Konferenz)
Datenträger
Englisch
Simulated Performance of an Indirect Methanol Fuel Cell System
SAE Technical Papers | 2001
|Simulated performance of an indirect methanol fuel cell system
Kraftfahrwesen | 2001
|Indirect-methanol and direct-methanol fuel cell vehicles
AIAA | 2000
|A simulation model for an indirect methanol fuel cell vehicle
Kraftfahrwesen | 2000
|A Simulation Model for an Indirect Methanol Fuel Cell Vehicle
SAE Technical Papers | 2000
|