Tubular fuel cell design

Axial symmetric representation is typically considered for single tubular fuel cell modeling because it allows one to design, mesh and compute only a portion of the cell taking advantage of the symmetry condition. The partial differential equations are written in cylindrical coordinates and solved in two dimensions (radial and axial). This assumption is possible when there are no significant circumferential variations in the boundary conditions. Such a hypothesis is reasonable when the... 

Solid Oxide Fuel Cells, History, Fig. 3 Tubular solid oxide fuel cell design... 

TOTO have adopted another method of cell fabrication - that of wet-sintering. The aim of this is to overcome the cost of the EVD process. Although much progress has been made with this recently, the Siemens Westinghouse SOFC design remains the most advanced of the tubular SOFC types. Figures 7.26 and 7.28 show stacks built up of tubular fuel cells and Figure 7.29 shows a 100-kW demonstration that has been built and operated in the Netherlands. 

E ure 12.16 Different fuel cell designs, (a) Dual-chamber planar, (b) Tubular, (c) Single-chamber planar fuel cell. 

The Acumentrics technology is based on micro-tubular fuel cells. The small tube design, together with all the features of the tubular cells, permit a rapid fuel cell start, particularly useful in back-up power applications. Acumentrics has recently demonstrated stable cell performance for over 6000 h, with a degradation rate of 0.25% after 500 h. This achievement is close to the Phase III SEGA goal of 0.1%/500 h... 

SOFC are produced with either tubular or planar stack configurations investments for planar design are a rough estimate, as no prototypes exist. Specific investments for PAFC are in the range 4000- 4500/kW (IEA, 2007). For further fuel-cell R D needs see IEA (2005). 

Ciano C., Cali M., Melhus O., Verda V., 2006. A model for the configuration design of a tubular Solid Oxide Fuel Cell Stack. ASME Paper IMECE2006-16141, Chicago, IL, November 5-10, 2006. 

Haynes C., Wepfer W.J., 2000. Design for power of a commercial grade tubular solid oxide fuel cell. Energy Conversion Management 41, 1123-1139. 

Solid oxide fuel cell — Figure 3. Configuration for a tubular design SOFC [iii]... 

Kuchynka et al. [125] studied the electrochemical oxidative dimerization of methane to C2 hydrocarbon species using perovskite anode electrocatalysts. Three designs of solid oxide fuel cells were used, including tubular and flat plate solid electrolytes. The maximum current density for the dimerization reaction at these electrocatalysts was related to the oxygen binding energies on the catalyst surface. The anodic reaction was ... 

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