Automated, model-based analysis of Uj-data for electrolyte-supported SOFC short-stacks
| Autor: | Thomas Hocker, Roland Denzler, Boris Iwanschitz, Markus Linder, Andreas Mai |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Thermodynamic equilibrium business.industry Scattering Modeling Energy Engineering and Power Technology Mechanics Electrolyte 540: Chemie Natural gas Solid oxide fuel cell VI-Characteristics SOFC business Electrical impedance Ohmic contact Leakage 621.3: Elektrotechnik und Elektronik Leakage (electronics) |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|