NDLI: Coupled Transport Effects in Solid Oxide Fuel Cell Modeling

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Coupled Transport Effects in Solid Oxide Fuel Cell Modeling

Content Provider	MDPI
Author	Gedik, Aydan Lubos, Nico Kabelac, Stephan
Copyright Year	2022
Description	With its outstanding performance characteristics, the SOFC represents a promising technology for integration into the current energy supply system. For cell development and optimization, a reliable quantitative description of the transport mechanisms and the resulting losses are relevant. The local transport processes are calculated by a 1D model based on the non-equilibrium thermodynamics (NET). The focus of this study is the mass transport in the gas diffusion layers (GDL), which was described as simplified by Fick’s law in a previously developed model. This is first replaced by the Dusty-Gas model (DGM) and then by the thermal diffusion (Soret effect) approach. The validation of the model was performed by measuring $U,j$ -characteristics resulting in a maximum deviation of experimental to simulated cell voltage to up to 0.93%. It is shown that, under the prevailing temperature, gradients the Soret effect can be neglected, but the extension to the DGM has to be considered. The temperature and heat flow curves illustrate the relevance of the Peltier effects. At $T=1123.15$ K and $j=8000$ $A/m^{2}$, 64.44% of the total losses occur in the electrolyte. The exergetic efficiency for this operating point is 0.42. Since lower entropy production rates can be assumed in the GDL, the primary need is to investigate alternative electrolyte materials.
Starting Page	224
e-ISSN	10994300
DOI	10.3390/e24020224
Journal	Entropy
Issue Number	2
Volume Number	24
Language	English
Publisher	MDPI
Publisher Date	2022-01-31
Access Restriction	Open
Subject Keyword	Entropy Energy and Fuel Technology Solid Oxide Fuel Cell (sofc) Non-equilibrium Thermodynamics (net) Dusty-gas Model (dgm) Thermal Diffusion Soret Effect Entropy Production Exergy Efficiency
Content Type	Text
Resource Type	Article

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