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Efficient planar SOFC technology for a portable power generator

By A. Poenicke, S. Reuber, C. Dosch, S. Megel, M. Kusnezoff, C. Wunderlich and A. Michaelis

Abstract

Portable power generators for camping and industrial applications require start-up times around 30 minutes and need to achieve a life time of 3,000 h including 300 cycles. Preferably they operate on available fuels and have a compact and lightweight system design. Eneramic®, a portable solid oxide fuel cell (SOFC) system in the 100 Watt class has been developed. A planar SOFC stack based on electrolyte supported cells and ferritic interconnects is used for the eneramic® system. The long-term stability of SOFC stacks was tested over more than 3,000 hours with power degradation below 1.0 %/1,000 h. However, hotbox testing of 40-cell stacks and stack operation in the system environment revealed slightly higher degradation rates between 2.1 and 2.3 %/1,000 hours. SOFC stacks exposed to thermal cycles showed no power losses. The results show that the compact planar SOFC stack is capable to survive the expected system life time

Topics: SOFC, stack, degradation, reliability, system, LPG
Year: 2012
DOI identifier: 10.1002/9781118217481.ch12
OAI identifier: oai:fraunhofer.de:N-221420
Provided by: Fraunhofer-ePrints
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