Numerical and experimental assessment of a novel SOFC-based system for micro-power generation

Cammarata, Alberto; Lacharme, Maria Carmenza Dìaz; Colbertaldo, Paolo; Donazzi, Alessandro; Campanari, Stefano

doi:10.1016/j.jpowsour.2022.232180

Cited by 12 publications

(4 citation statements)

References 17 publications

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“…In this set-up, the SOFC was mechanically pressed in between the current collectors by application of 6 kg weight on the top of the assembly. 30 The anodic current collector was a metal Ni block, with 21 rectangular channels, 2 mm tall and 1.2 mm wide, with 1.2 mm wall thickness. Two Ni current collecting nets (150 mesh and 10 mesh) were pressed on the surface of the anode.…”

Section: Methodsmentioning

confidence: 99%

Experimental and Model Investigation of a Solid Oxide Fuel Cell Operated Under Low Fuel Flow Rate

Neri,

Cammarata,

Donazzi

2023

J. Electrochem. Soc.

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A state-of-the-art anode-supported Ni-YSZ/YSZ/GSC/LSC SOFC with 16 cm2 cathode area was tested at low anodic flow rate (6.25 Ncc min−1 cm−2) and large excess of air (93.75 Ncm3 min−1 cm−2). These conditions are typical of stacks, where high H2 utilization is targeted, but are uncommon in single cell testing. H2-based mixtures were supplied between 550 °C and 750 °C, varying the partial pressure of H2 (between 93% and 21% with 7% H2O mol/mol) and H2O (between 10% and 50% H2O with 50% H2). I/V and EIS measurements were collected and analyzed with a 1D+1D model of a SOFC with rectangular duct interconnectors. At 750 °C and 93% H2, 58% fuel utilization was obtained, which raised to 81% at 21% H2, driving the SOFC under internal diffusion control. The model analysis confirmed that nearly-isothermal conditions were retained thanks to efficient heat dissipation, and that air acted as a coolant. During testing, the contact resistance grew to 0.16 Ω cm2 at 750 °C, limiting the SOFC’s performance to a maximum power density of 340 W cm−2 with 7% humidified H2. The kinetic parameters of the anodic reaction were derived by fitting, finding a positive order for H2 (+0.9), and a negative order for H2O (−0.58).

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Section: Methodsmentioning

confidence: 99%

Experimental and Model Investigation of a Solid Oxide Fuel Cell Operated Under Low Fuel Flow Rate

Neri,

Cammarata,

Donazzi

2023

J. Electrochem. Soc.

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“…Additional details about the experimental setup are provided in Ref. (6). Before testing the SOFC a 32-hour-long procedure is carried out to reduce the NiO phase in the anode.…”

Section: Experimental Methodsmentioning

confidence: 99%

Experimental Analysis of the Effect of Cathodic CO₂ Supply to Industrial Solid Oxide Fuel Cells

Pagliari,

Montinaro,

Martelli

et al. 2023

ECS Trans.

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In the SOS-CO2 cycle, a newly developed hybrid cycle for blue power production, the SOFC cathode is supplied with a CO2-rich oxidizing stream, while the anode is fed with a reformate mixture. The performance and the durability of 25 cm2 Ni-YSZ anode-supported SOFCs are experimentally evaluated under the SOS-CO2 cycle conditions for 150 h. By testing symmetric cells with LSCF-GDC and LSC-GDC electrodes, the effects of the CO2-rich atmosphere on the cathodic material are also investigated. The results show that the loss of performance caused by the cathodic supply of CO2 is stable in time, but also reversible when switching back to air. The cathodic supply of CO2 causes both an increase of the polarization resistance and of the ohmic resistance, suggesting a reduction of electronic conductivity compatible with formation of carbonates on the perovskite surface.

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“…The effective surface area of the cathode is defined by the designer and is a fraction of the total cell area. Many different sizes are reported in the literature: 0.8 x 5.6 cm² [11], 5 x 5 cm² [12][13][14], 10 x 10 cm² [14,15] and 12 x 8 cm² [15].…”

Section: Methodsmentioning

confidence: 99%

Determination of Maximum Power to Be Produced by a Solid Oxide Fuel Cell

Andrade,

Huebner,

Matencio

et al. 2023

Preprint

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Solid oxide fuel cells can generate electrical energy more efficiently and reduce pollutant emissions. They can be applied in many practical engineering cases, such as stationary generation, aircraft, and hybrid fast charging stations. This work uses heuristic and deterministic optimization algorithms coupled with thermodynamics lumped models to determine the main operation variables to achieve maximum power. We found, as expected, that higher pressures improve the power output of one cell. For one cell operating near atmospheric pressure, the output power was 78.56 W; for an operating condition near 5 atm, the output power was 99.21 W. Moreover, the heuristic and deterministic algorithms obtained similar results. The proposed model can be improved with chemical kinetics and the inclusion of cell dimensions to become more precise but offers a base method to estimate the main operating variables of an SOFC.

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Numerical and experimental assessment of a novel SOFC-based system for micro-power generation

Cited by 12 publications

References 17 publications

Experimental and Model Investigation of a Solid Oxide Fuel Cell Operated Under Low Fuel Flow Rate

Experimental and Model Investigation of a Solid Oxide Fuel Cell Operated Under Low Fuel Flow Rate

Experimental Analysis of the Effect of Cathodic CO₂ Supply to Industrial Solid Oxide Fuel Cells

Determination of Maximum Power to Be Produced by a Solid Oxide Fuel Cell

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Numerical and experimental assessment of a novel SOFC-based system for micro-power generation

Cited by 12 publications

References 17 publications

Experimental and Model Investigation of a Solid Oxide Fuel Cell Operated Under Low Fuel Flow Rate

Experimental and Model Investigation of a Solid Oxide Fuel Cell Operated Under Low Fuel Flow Rate

Experimental Analysis of the Effect of Cathodic CO2 Supply to Industrial Solid Oxide Fuel Cells

Determination of Maximum Power to Be Produced by a Solid Oxide Fuel Cell

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Product

Resources

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Experimental Analysis of the Effect of Cathodic CO₂ Supply to Industrial Solid Oxide Fuel Cells