CFD-Based Design of Microtubular Solid Oxide Fuel Cells

2010 ◽  
Vol 132 (6) ◽  
Author(s):  
Stefano Cordiner ◽  
Alessandro Mariani ◽  
Vincenzo Mulone
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Power Density ◽  
Fluid Dynamic ◽  
Scale Up ◽  
Design Procedure ◽  
Operating Conditions ◽  
Solid Oxide ◽  
Local Concentration ◽  
Oxide Fuel

Microtubular solid oxide fuel cells (MT-SOFCs) are interesting for portable and auxiliary power units energy production systems, due to their extremely fast startup time. However, a single cell provides power in the range of 1 W, thus the number of microtubes to reach a kW scale is relevant and packaging design issues arise also. In this paper a specifically developed design procedure is presented to face with system issues and bringing into account fluid-dynamic and thermal influence on system performance. The procedure also simplifies the stack manifold design by means of a modular scale-up procedure starting from a basic optimized configuration. To this aim, a computational fluid dynamics (CFD) model has been integrated with specific models for fuel cell simulation and then validated with tailored experimental data by varying operating conditions in terms of fuel utilization and electric load. A comprehensive three–dimensional (3D) thermal-fluid-dynamic model has then been applied to the analysis of both micro-assembly (i.e., 15 tube assembly) and midi-assembly (up to 45 tubes), showing an important role of local phenomena as current homogeneity and reactant local concentration that have a strong influence on power density and temperature distribution. Microreactor power density in the range of 0.3 kW/l have been demonstrated and a specific manifold design has been realized paving the way toward a modular realization of a 1 kW MT-SOFC.

scholarly journals A 2-D model for Intermediate Temperature Solid Oxide Fuel Cells Preliminarily Validated on Local Values

Catalysts ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 36 ◽  
Author(s):  
Bruno Conti ◽  
Barbara Bosio ◽  
Stephen John McPhail ◽  
Francesca Santoni ◽  
Davide Pumiglia ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Operating Conditions ◽  
Solid Oxide ◽  
Intermediate Temperature ◽  
Physical Parameters ◽  
Local Concentration ◽  
Oxide Fuel ◽  
Molten Carbonate ◽  
Experimental Apparatus ◽  
Set Up

Intermediate Temperature Solid Oxide Fuel Cell (IT-SOFC) technology offers interesting opportunities in the panorama of a larger penetration of renewable and distributed power generation, namely high electrical efficiency at manageable scales for both remote and industrial applications. In order to optimize the performance and the operating conditions of such a pre-commercial technology, an effective synergy between experimentation and simulation is fundamental. For this purpose, starting from the SIMFC (SIMulation of Fuel Cells) code set-up and successfully validated for Molten Carbonate Fuel Cells, a new version of the code has been developed for IT-SOFCs. The new release of the code allows the calculation of the maps of the main electrical, chemical, and physical parameters on the cell plane of planar IT-SOFCs fed in co-flow. A semi-empirical kinetic formulation has been set-up, identifying the related parameters thanks to a devoted series of experiments, and integrated in SIMFC. Thanks to a multi-sampling innovative experimental apparatus the simultaneous measurement of temperature and gas composition on the cell plane was possible, so that a preliminary validation of the model on local values was carried out. A good agreement between experimental and simulated data was achieved in terms of cell voltages and local temperatures, but also, for the first time, in terms of local concentration on the cell plane, encouraging further developments. This numerical tool is proposed for a better interpretation of the phenomena occurring in IT-SOFCs and a consequential optimization of their performance.

Concepts for Ultra-High Power Density Solid Oxide Fuel Cells (SOFC)

2014 ◽  
Vol 61 (1) ◽  
pp. 177-190
Author(s):  
L. Zhu ◽  
L. Zhang ◽  
F. Zhao ◽  
A. V. Virkar
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Power Density ◽  
High Power ◽  
Solid Oxide ◽  
High Power Density ◽  
Oxide Fuel

Geometrical scale dependency of thin film solid oxide fuel cells

2020 ◽  
Vol 34 (07n09) ◽  
pp. 2040038
Author(s):  
Yeageun Lee ◽  
Jianhuang Zeng ◽  
Chunhua Zheng ◽  
Wonjong Yu ◽  
Suk Won Cha ◽  
...  
Keyword(s):  
Thin Film ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Power Density ◽  
Solid Oxide ◽  
Scale Dependency ◽  
Oxide Fuel ◽  
Cross Sectional ◽  
Ohmic Losses ◽  
Geometrical Scale

To study the geometrical scale dependency of thin film solid oxide fuel cells (SOFCs), we fabricated three thin films SOFCs which have the same cross-sectional structure but different electrode areas of 1 mm2, 4 mm2 and 9 mm2. Since the activation and ohmic losses of SOFCs depend on their active region, we examined the variations of the power density of the cells with a Pt/YSZ/Pt structure and simulated the power density variations using the COMSOL software package.

Microstructure optimization of nickel/gadolinium-doped ceria anodes as key to significantly increasing power density of metal-supported solid oxide fuel cells

2019 ◽  
Vol 44 (59) ◽  
pp. 31475-31487 ◽  
Author(s):  
Cornelia Bischof ◽  
Andreas Nenning ◽  
Andreas Malleier ◽  
Lukas Martetschläger ◽  
Andre Gladbach ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Power Density ◽  
Solid Oxide ◽  
Doped Ceria ◽  
Oxide Fuel ◽  
Gadolinium Doped Ceria

SFA-SDC Composite Cathodes Fabricated with Glycine-Nitrate Process for Intermediate-Temperature Solid Oxide Fuel Cells

2014 ◽  
Vol 1070-1072 ◽  
pp. 488-491
Author(s):  
Xiu Ling Yu ◽  
Ming Fei Shi
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Power Density ◽  
Peak Power ◽  
Solid Oxide ◽  
Intermediate Temperature ◽  
Oxide Fuel ◽  
Reaction Products ◽  
Mass Content ◽  
Composite Cathodes

SrFe0.9Al0.1O3-δ(SFA) powder was mixed with a different mass content of SDC 10, 20 and 30 wt.% to form SFA-SDC composite cathodes subsequently investigated as potential IT-SOFC cathodes on LSGM electrolytes. No obvious reaction products between SDC (or LSGM) and SFA occur under test for the cathode of SOFCs. As SOFC cathodes, the area-specific resistances of the SFA-SDC cathodes on the LSGM electrolyte with SDC 10, 20 and 30 wt.% at 800 oC are 0.089, 0.068 and 0.087 Ω cm2, respectively. The peak power density of the SFA-SDC20 on a 300 μm-thick LSGM electrolyte reach 512 mW cm−2 at 800 °C.

Tracking the Onset of Damage Mechanism in Ceria-based Solid Oxide Fuel Cells under Simulated Operating Conditions

2006 ◽  
Vol 34 (3) ◽  
pp. 12707 ◽  
Author(s):  
DMR Mitchell ◽  
K Sato ◽  
H Omura ◽  
T Hashida ◽  
K Yashiro ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Damage Mechanism ◽  
Operating Conditions ◽  
Solid Oxide ◽  
Oxide Fuel

Scale-up of Solid Oxide Fuel Cells with Magnetron Sputtered Electrolyte

Fuel Cells ◽  
2017 ◽  
Vol 17 (3) ◽  
pp. 378-382 ◽  
Author(s):  
A. A. Solovyev ◽  
A. M. Lebedynskiy ◽  
A. V. Shipilova ◽  
I. V. Ionov ◽  
E. A. Smolyanskiy ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Scale Up ◽  
Solid Oxide ◽  
Oxide Fuel
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