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plans to develop technologies and systems for a lightweight, overwhelming lethal, strategically deployable, self-sustaining combat systems.55 8.7 Fuel Cell Auxiliary Power Systems In addition to high-profile fuel cell applications such as automotive propulsion and distributed power generation, the use of fuel cells as auxiliary power units (APUs) for vehicles has received considerable attention (see Figure 8-43). APU applications may be an attractive market because it offers a true mass-market opportunity that does not require the challenging performance and low cost required for propulsion systems for vehicles. In this section, a discussion of the technical performance requirements for such fuel cell APUs, as well as the current status of the technology and the implications for fuel cell system configuration and cost is given. Participants BMW, International Fuel Cells1 Ballard, Daimler- Chrysler2 BMW, Delphi, Global Thermoelectric3 Application passenger car, BMW 7-series Class 8 Freightliner heavy-duty Century Class S/T truck cab passenger car Size range 5kW net 1.4 kW net for 8000 BTU/h A/C unit 1to5kWnet Fuel /Fuel Cell type Hydrogen, Atmospheric PEM Hydrogen, PEM Gasoline, SOFC Nature of Activity Demonstration Demonstration Technology development program Figure 8-43 Overview of Fuel Cell Activities Aimed at APU Applications Auxiliary power units are devices that can provide all or part of the non-propulsion power for vehicles. Such units are already in widespread use in a range of vehicle types and for a variety of applications, in which they provide a number of potential benefits (see Figure 8-44). Although each of these applications could provide attractive future markets for fuel cells, this section will focus on application to on-road vehicles (specifically trucks). Vehicles Types Loads Serviced Potential Benefits • Heavy-duty & utility trucks • Airplanes • Trains • Yachts & Ships • Recreational vehicles • Automobiles & light trucks (not commercial yet) • Space conditioning • Refrigeration • Lighting and other cabin amenities • Communication and information equipment • Entertainment (TV, radio) • Can operate when main engine unavailable • Reduce emissions and noise while parked • Extend life of main engine • Improve power generation efficiency when parked Figure 8-44 Overview of APU Applications 55 J.C. Stephens, K. Gardner, and R. Jacobs, “US Army CECOM Fuel Cell Program,” presented at the World Association for Case Method Research and Application, Lucerne, Switzerland, January 5-7, 2000. 8-96PDF Image | Fuel Cell Handbook (Seventh Edition)
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