Performance analysis of a SOFC under direct internal reforming conditions
نویسندگان
چکیده
This paper presents the performance analysis of a planar solid-oxide fuel cell (SOFC) under direct internal reforming conditions. A detailed olid-oxide fuel cell model is used to study the influences of various operating parameters on cell performance. Significant differences in efficiency nd power density are observed for isothermal and adiabatic operational regimes. The influence of air number, specific catalyst area, anode hickness, steam to carbon (s/c) ratio of the inlet fuel, and extend of pre-reforming on cell performance is analyzed. In all cases except for the case f pre-reformed fuel, adiabatic operation results in lower performance compared to isothermal operation. It is further discussed that, though direct nternal reforming may lead to cost reduction and increased efficiency by effective utilization of waste heat, the efficiency of the fuel cell itself is igher for pre-reformed fuel compared to non-reformed fuel. Furthermore, criteria for the choice of optimal operating conditions for cell stacks perating under direct internal reforming conditions are discussed. 2007 Elsevier B.V. All rights reserved.
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