Fuel cells system diagram

A simplified flow diagram of a high-temperature fuel cell system. 

Functional block diagram of a fuel cell system. 

Figure 32.6 Pinch diagram for different lOkWei fuel-cell systems based on selected fuels.

Figure 1.10(a). Block diagram of a PEM fuel cell system [11]. (Pukrushpan JT, Stefanopoulou AG, Peng H. IEEE Control Systems Magazine, Control of fuel cell breathing. 2004 IEEE. Reprinted with permission.)... 

The type of temperature control used in a fuel cell system depends on the type of fuel cell in the system. If the fuel cell is cathode air cooled, the blower which also supplies the cathode process air flow is used to cool the fuel cell stack. In such a control structure, it is important to include a blower model which can predict a minimum blower set point to ensure that a certain minimum stoichiometry is respected at all times. Figure 21.15 shows a diagram of such a control system. 

One of the most frequent comments by reviewers of the first edition has been to commend its clarity. To make the many topics encompassed by fuel cell technology clear to newcomers was one of our most important aims. Nevertheless, there is always room for improvement, and many changes have been made to make the text and diagrams even clearer. Many new diagrams have been added, and others improved. We have added an entirely new chapter that brings together the issues involved in system design and analysis. This introduces concepts such as well-to-wheel analysis, which is now a vital element of systems studies in transportation appUcations. In this new chapter, practical examples of both stationary and mobile applications completes our analysis of fuel cell systems. 

FIGURE 9-12. Schematic diagram of air supply for a fuel cell system. 

FIGURE 9-13. Schematic diagram of a fuel cell system with an expander at the exhaust. 

FIGURE 9-23. An actual fuel cell system installed in a John Deere Gator utility vehicle showing all the components from the schematic diagram in Figure 9-22. 

FIGURE 10-6. Schematic diagram of a cogeneration-capable fuel cell power system a cogeneration subsystem, within dashed lines (from [30]) combined with a fuel cell system from Figure 9-38. 

The Brouwer diagram approach can be illustrated with reference to the perovskite structure oxide system BaYbvPr VC>3, which has been explored as a potential cathode material for use in solid oxide fuel cells. The parent phase... 

Figure 6.3 provides a simplified block diagram of a fuel cell power plant system. Gasification is used to convert the solid fuel to gas, which is processed to remove sulfur compounds, tars, particulates, and trace contaminants. The clean gas is then converted to electricity in the FC. Waste heat from the FC is used to generate steam, which can be used to run the gasification process and to generate additional power in the bottoming cycle. 

Figure 9-23 Diagram of a proposed Siemens-Westinghouse hybrid system (Taken from DOE Project Fact Sheet - Fuel Cell/ATS Hybrid Systems)...

Figure 1. Schematic diagram of a residential fuel cell micro cogeneration system...

---