Siemens Westinghouse SOFC

FIGURE 6.12 Siemens Westinghouse SOFC cross-sectional micrograph, showing a dense YSZ electrolyte deposited by EVD [48]. Reprinted from [48] with permission from Elsevier. 

Europe The ELSAM/EDB project for a 100 kWe Siemens-Westinghouse SOFC field unit has operated from January 1998. The unit will operate until January 2000 with a total of 17,500 test hours according to the plan. 

Table 11-6 Siemens Westinghouse SOFC Field Units...

Demonstration highlight The world s largest SOFC system, a 100 kW Siemens-Westinghouse SOFC installed at a Dutch cogeneration plant in 1998. 

George, R. and Casanova, A., Developments in Siemens Westinghouse SOFC program, in Proceedings of2003 Fuel Cell Seminar, 2003, p. 895. 

Fig. 4.33 Microstructure of a cross-section of a Siemens-Westinghouse SOFC. (Reproduced with the kind permission of S.C. Singhal.)...

The MCFC is suitable for integration with gas turbines, and Japanese studies of this topic are extensive. But there are no prototypes as for the SOFC (Siemens Westinghouse). Two figures taken from Chapters 4 and 5 are reproduced below for the reader s convenience. The first figure (Figure 1.2) is the Siemens Westinghouse SOFC/gas turbine integration scheme. 

Figure 4.1 Siemens Westinghouse SOFC/gas turbine integration scheme...

All the SOFC competitors seek to compete by overcoming the operational limitations of the Siemens Westinghouse SOFC, and a new competitor, Acumentries Inc., has appeared, to exploit the small-tube SOFC, introduced in Figure 4.8. (See web site list.)... 

Kabs H., Operational Experience with Siemens-Westinghouse SOFC Cogeneration Systems, Proceedings of Lucerne Fuel Cell Forum 2001, Lucerne (Switzerland), 2001. 

Figure 7-11 Schematic cross-section of cylindrical Siemens Westinghouse SOFC Tube... 

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. 

The ejector is the simplest of all types of pumps. It has no moving parts. They are widely used in hydrogen fuel cells where the hydrogen is stored at pressure. In some Siemens Westinghouse SOFCs, they are used to recirculate the fuel gas. They harness the stored mechanical energy in the gas to circulate the fuel around the ceU. 

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