Catalogue : Reviews
Reviews
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Torsten Schwarz Das Wasserstoffsubsystem und sein Einfluss auf die Kenngrößen des Brennstoffzellenantriebes ISBN: 978-3-8322-9260-7 Price: 48,80 € / 97,60 SFR |
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| The objective of this work is to investigate how the hydrogen subsystem can influence the characteristics of a fuel cell power train. In the main focus are the aspects safety, emissions, efficiency, and durability. At the beginning fundamentals of hydrogen safety and degradation mechanisms of fuel cells are investigated. Afterwards the necessary development of a non-invasive online measuring system that is based on ultrasound is described. Starting from the experiences with the VW HyMotion2 fuel cell engine a completely new concept has been developed and tested. Due to the use of an active recirculation the complexity can be reduced and there is the possibility for the implementation of several new operating strategies. Therefore the occurrence of conditions which cause degradation can be reduced considerably. Operating the anode recirculation with 30 % nitrogen allows a significant reduction of the hydrogen losses and therefore increases the fuel cell engine efficiency in the New European Driving Cycle to approx. 48 %. Thus the HyMotion3 drive train has a tank to wheel efficiency of approx. 33 %. Additionally hydrogen emissions can almost completely be avoided by catalytic combustion at the cathode. The maximum exhaust concentration is less than 0,2 %. (orig.) | |
| Source: ETDE - Energy Database-production no.:DE10GD754 | |
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