Simulation Study for the Optimization of Microtubular Solid Oxide Fuel Cell Bundles

2010 ◽  
Vol 7 (2) ◽  
Author(s):  
Yoshihiro Funahashi ◽  
Toru Shimamori ◽  
Toshio Suzuki ◽  
Yoshinobu Fujishiro ◽  
Masanobu Awano
Keyword(s):  
Solid Oxide Fuel Cells ◽  
Power Density ◽  
Simulation Study ◽  
Operating Conditions ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Flow Temperature ◽  
Temperature Changes ◽  
Current Collection ◽  
Rapid Temperature

Microtubular solid oxide fuel cells (SOFCs) are shown to be robust under rapid temperature changes and have large electrode area per volume (high volumetric power density). Such features are believed to increase a variety of application. Our study aims to establish a fabrication technique for microtubular SOFC bundles with the volumetric power density of 2 W cm−3 at 0.7 V. So far, we have succeeded to develop a fabrication technology for microtubular SOFC bundles using anode supported tubular SOFCs and cathode matrices with well-controlled microstructures. A key to improve the performance of the microtubular SOFC bundles is to optimize the microstructure of the cathode matrices because it influences a pressure loss for air and electric current collection. In this paper, a simulation study of an air flow, temperature, and potential distributions in the microtubular SOFC bundle was conducted in order to understand the characteristics of the present bundle design. In addition, operating conditions of the microtubular SOFC bundles was discussed for realizing the target power density of 2 W cm−3.

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 The Development of Current Collection in Micro-Tubular Solid Oxide Fuel Cells—A Review

2021 ◽  
Vol 11 (3) ◽  
pp. 1077
Author(s):  
Oujen Hodjati-Pugh ◽  
Aman Dhir ◽  
Robert Steinberger-Wilckens
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Power Density ◽  
Mechanical Stability ◽  
Current Collector ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Current Collection ◽  
Start Up

Micro-tubular solid oxide fuel cells (µT-SOFCs) are suited to a broad range of applications with power demands ranging from a few watts to several hundred watts. µT-SOFCs possess inherently favourable characteristics over alternate configurations such as high thermo-mechanical stability, high volumetric power density and rapid start-up times, lending them particular value for use in portable applications. Efficient current collection and interconnection constitute a bottleneck in the progression of the technology. The development of current collector designs and configuration reported in the literature since the inception of the technology are the focus of this study.

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

Improving Current Collection of Tubular Solid Oxide Fuel Cells

2021 ◽  
Vol 103 (1) ◽  
pp. 83-92
Author(s):  
Hai Feng ◽  
Dhruba Panthi ◽  
Yanhai Du
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Current Collection

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.

Isovalent doping: a new strategy to suppress surface Sr segregation of the perovskite O2-electrode for solid oxide fuel cells

2020 ◽  
Vol 8 (27) ◽  
pp. 13763-13769
Author(s):  
Bonjae Koo ◽  
Jongsu Seo ◽  
Jun Kyu Kim ◽  
WooChul Jung
Keyword(s):  
Solid Oxide Fuel Cells ◽  
Perovskite Oxides ◽  
Operating Conditions ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Surface Stability ◽  
Practical Solution ◽  
Actual Operating ◽  
Isovalent Doping ◽  
New Strategy

Isovalent doping is a practical solution for ensuring surface stability of Sr-containing perovskite oxides for solid oxide fuel cell O2-electrodes under actual operating conditions.

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
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