|Title:||Automated, model-based analysis of Uj-data for electrolyte-supported SOFC short-stacks|
|Authors :||Linder, Markus|
|Conference details:||7th Symposium on Fuel Cell Modelling and Experimental Validation (MODVAL7), Morges (Lausanne), Switzerland, 23–24 March 2010|
|Publisher / Ed. Institution :||Wiley - VCH Verlag GmbH & Co. KGaA|
|Language :||Englisch / English|
|Subjects :||Leakage; Modeling; VI-Characteristics; SOFC|
|Subject (DDC) :||540: Chemie|
621.3: Elektrotechnik, Elektronik
|Abstract:||A simplified model is presented to analyse current-voltage characteristics of electrolyte supported solid oxide fuel cell stacks that run on reformed hydrocarbon fuels such as natural gas. The model takes into account the fuel reforming process, fuel leakages and electrochemical conversions all in an idealised manner, i.e. it assumes thermodynamic equilibrium. However, the model explicitly accounts for parameter variations that are often unavoidable under realistic testing conditions. These variations include changes in the fuel composition, changes in the fuel mass fluxes and changes in the operation temperature. In addition, internal repeat unit resistances as extracted from current-voltage data are compared with the ohmic and polarisation losses obtained from independent electrical impedance measurements data. Since the data analysis is done in a highly automated fashion, large sets of current-voltage data can be compared and 'normal' data sets can be discriminated from 'abnormal' ones. The model has the potential to accelerate testing by eliminating variations that lead to corruption and unwanted scattering of current-voltage data.|
|Departement:||School of Engineering|
|Organisational Unit:||Institute of Computational Physics (ICP)|
|Publication type:||Konferenz: Paper / Conference Paper|
|Appears in Collections:||Publikationen School of Engineering|
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