A 700 W anode-supported micro-tubular solid-oxide fuel cell (SOFC) stack for use as an auxiliary power unit (APU) for an automobile is fabricated and characterized in this study. For this purpose, a single cell was initially designed via optimization of the current collecting method, the brazing method and the length of the tubular cell. Following this, a high-power single cell was fabricated that showed a cell performance of 0.54 W/cm2 at 0.7 V and 800 deg C using H2 (fuel utilization = 45 %) and air as fuel and oxidant gas, respectively. Additionally, a fuel manifold was designed by adopting a simulation method to supply fuel gas uniformly into a single unit cell. Finally, a 700 W anode-supported micro-tubular SOFC stack was constructed by stacking bundles of the single cells in a series of electrical connections using H2 (fuel utilization = 49 %) and air as fuel and oxidant gas, respectively. The SOFC stack showed a high power density of 0.38 W/cm2; moreover, due to the good thermo-mechanical properties of the micro-tubular SOFC stack, the start-up time could be reduced by 2 h, which corresponds to 6 deg C/min.
Development of a 700 W anode-supported micro-tubular SOFC stack for APU applications
Entwicklung einer anodengestützten mikrotubularen 700-W-Festoxidbrennstoffzelle für APU-Anwendungen
International Journal of Hydrogen Energy ; 33 , 9 ; 2330-2336
2008
7 Seiten, 8 Bilder, 15 Quellen
Article (Journal)
English
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