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Portable 100W power generator based on efficient planar SOFC technology

: Reuber, S.; Pönicke, A.; Wunderlich, C.; Michaelis, A.

Volltext urn:nbn:de:0011-n-2388299 (957 KByte PDF)
MD5 Fingerprint: ee28ea048c205e141a2d790b02d9e499
Erstellt am: 4.11.2014

European Fuel Cell Forum -EFCF-:
10th European Solid Oxide Fuel Cell Forum, SOFC 2012. Proceedings : Fundamentals, Materials, Systems, Applications; 26 - 29 June 2012, Lucerne/Switzerland
Oberrohrdorf/Switzerland: European Fuel Cell Forum, 2012
European Solid Oxide Fuel Cell Forum (SOFC) <10, 2012, Luzern>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer IKTS ()

An ultra-compact, portable solid oxide fuel cell (SOFC) system is presented that is based on multilayer and ceramic technology and that uses commercially available fuels. The eneramic® SOFC system is intended for use in leisure, industrial and security applications. In these markets, portability, simplicity and ease of use have a higher priority than efficiency, much in contrast to stationary applications. Thus the eneramic® system was designed to run on widely available propane/butane fuels and applies a dry reforming process (CPOx). Bio-ethanol fuels have been tested successfully as well after small modifications at system level. In order to achieve a compact system with good thermal integration, low cost and ease of assembly the gas processing unit consists of a metallic multilayer asse mbly. Thus the hotbox core comprises the planar stack on top, the central media distribution module, and the heat management module below in a single, mechanically compact module. The applied multilayer technology offers new design opportunities for compact internal gas manifolding with low pressure loss. The stack itself is based on IKTS electrolyte supported cells (ESC). 3YSZ based ESCs were chosen for their low cost and for their good mechanical and redox stability. The long-term stability of SOFC stacks was tested over more than 3,000 hours with power degradation below 1.0 %/1,000 h. The results show that the compact planar SOFC stack is capable to survive the expected system life time. Due to its good thermal packaging, the current system achieves gross efficiencies up to 36% and a ne t efficiency of 30% with off-the-shelf BoP components, which is at the forefront among those devices. With the developed hotbox core life time targets up to 2000 hrs have been reached in stationary operation mode. Here the test results of the new eneramic hotbox generation will be emphasized, that exceeds previous generation in terms of efficiency and lifetime. At system level the new stand alone prototype of the eneramic system will be introduced below.