Simulations about a fuel cell driving system were carried out to indicate how to improve the automotive propulsion system. Based on a fuel cell stack model, the related models were built up to optimize the fuel cell system and predict the effects of air exhaust energy recycling on the fuel cell system and the results of removing the big power DC/DC (direct current) converter out of the fuel cell driving system. For fuel cell system optimization, it is effective to keep the air stoichiometric ratio constant in middle and higher power ranges, and to keep the inlet pressure in linear with the power load in the meanwhile. It is highly advantageous for a fuel cell system to configure the turbocharger and the electric compressor in series than in parallel. The fuel cell driving system without DC/DC converter between the fuel cell sysem and the driving motor could reach much higher performance characteristics, even in lower power range, if the cell voltage was designated to be lower.
Numerical prediction on an automotive fuel cell driving system
Numerische Vorhersage eines Automobilantriebssystems mit Brennstoffzellen
International Journal of Hydrogen Energy ; 31 , 3 ; 361-369
2006
9 Seiten, 15 Bilder, 3 Tabellen, 18 Quellen
Article (Journal)
English
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