SOFC stacks for mobile applications with excellent robustness towards thermal stresses |
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| Affiliation: | 1. Department of Energy Conversion and Storage, Technical University of Denmark, Kgs. Lyngby, Denmark;2. FOSS, Hilleroed, Denmark;3. SINTEF, Oslo, Norway;4. Aalborg University, Aalborg, Denmark;1. Politecnico di Milano, Department of Energy, Via Lambruschini 4, 20156 Milan, Italy;2. National Fuel Cell Research Center, University of California, Irvine, CA 92697-3550, United States;1. Institute of Energy and Climate Research, IEK-1, Materials Synthesis and Processing, Forschungszentrum, Jülich GmbH, Germany;2. Institute of Energy and Climate Research, IEK-STE, Systems Analysis and Technology Evaluation, Forschungszentrum, Jülich GmbH, Germany;3. Central Institute for Engineering, Electronics and Analytics, ZEA-1, Engineering and Technology, Forschungszentrum, Jülich GmbH, Germany;4. Institute of Energy and Climate Research, IEK-3, Electrochemical Process Engineering, Forschungszentrum, Jülich GmbH, Germany;5. JARA Energy, Aachen, Germany;1. School of Materials Science and Engineering, Changwon National University, 20 Changwondaehak-ro, Changwon, Gyeongnam 641-773, Republic of Korea;2. HMC & Green Energy Research Institute, Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 143-747, Republic of Korea |
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| Abstract: | Solid oxide fuel cells (SOFC) are attractive power units for mobile applications, like auxiliary power units or range extenders, due to high electrical efficiencies, avoidance of noble metals, fuel flexibility ranging from hydrogen to hydrogen carriers such as ammonia, methanol or e-gas, and tolerance towards CO and other fuel impurities. Among challenges hindering more wide-spread use are the robustness under thermal cycling. The current study employs short stacks containing anode or metal supported SOFCs, which were subjected to thermal cycles in a furnace and under more realistic conditions without external furnace. Heating from 100 °C to operating temperature was accomplished by sending hot air through the cathode compartment and heating from bottom (and top) of the stack, reaching a fastest ramping time of ca. 1 h. The stacks remained intact under severe temperature gradients of at least 20 °C/cm for anode supported and 30 °C/cm for metal supported SOFCs. |
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| Keywords: | SOFC stack Mobile application Fast thermal cycling Robustness Thermal gradients Metal & anode supported SOFC |
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