The purpose of present study is to investigate the dynamic response of two conventional types of solid oxide fuel cells to the inlet air mass flow rate variation. A dynamic compartmental model based on CFD principles is developed for two typical planar and tubular SOFC designs. The model accounts for transport processes (heat and mass transfer), diffusion processes, electrochemical processes, a...

When connected in small amounts, the impact of distributed generation (DG) on distribution system stability will be negligible. However, if its penetration level becomes higher, distributed generation may start to influence the dynamic behavior of the system as a whole. This paper presents a mathematical representation of a solid oxide fuel cell plant that is suitable for use in distribution sy...

Solid oxide fuel cells (SOFCs) have the promise to improve energy efficiency and to provide society with a clean energy producing technology. The high temperature of operation (500-1000 C) enables the solid oxide fuel cell to operate with existing fossil fuels and to be efficiently coupled with turbines to give very high efficiency conversion of fuels to electricity. Solid oxide fuel cells are ...

This letter describes a method for forming Ru nanoclusters on oxide anode surfaces during the initial stages of solid oxide fuel cell operation, ielding improved anode performance without additional processing steps. Transmission electron microscope and X-ray photoelectron spectroscopy ◦ bservations showed that Ru nanoclusters precipitated onto La0.8Sr0.2Cr0.82Ru0.18O3−δ surfaces after exposure...

Degradation of solid oxide electrolysis cells (SOECs) is probably the biggest concern in the field of high temperature steam electrolysis (HTSE). Anode supported, YSZ-based microtubular solid oxide fuel cells (SOFC) have been tested in fuel cell mode and also at high voltages (up to 2.8V) under electrolysis mode. At high steam conversion rates the cell voltage tends to saturate. Our hypothesis ...

Develop solid oxide fuel cell (SOFC) materials and • architectures for robust operation on renewable/ biomass fuel streams. Identify optimal fuel-processing strategies for renewable • fuels, specifically biogas derived from anaerobic digesters commonly utilized for sludge remediation at wastewater treatment facilities. Employ system modeling to optimize SOFC system • configurations. Extend mode...

The impact of oxygen ion transport at the electrolyte–electrode interface of a micro-solid oxide fuel cell using different fuels is investigated. Model validation is performed to verify the results versus the reported values. Furthermore, as the hydrogen-to-carbon ratio decreases, the diffusivity of the oxygen ion increases. This increase in diffusivity is observed because the number of hydroge...