High Power Density Fuel Cell for Aircraft High Power
Technical Report,01 Apr 1972,31 Mar 1975
UNITED TECHNOLOGIES CORP SOUTH WINDSOR CT SOUTH WINDSOR United States
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Pratt and Whitney Aircraft has conducted an analytical and experimental program which demonstrated the feasibility of an ultra-lightweight fuel cell powerplant, with a specific weight of less than 0.5 lbkw, for advanced aircraft applications. Full-scale single cells and 12-cell development units, the basic modular repeating subsection of which a complete powerplant is assembled, were constructed and successfully tested. Power densities up to 3000 wattssq ft were demonstrated this level is almost 50 percent greater than that required for a competitive flightweight system. Endurance tests demonstrated an operating capability in excess of 600 baseline missions. Several complete power systems based on the as-demonstrated performance were defined. These systems included all equipment required for a flight operational installation i.e., powerplants, a reactant supply system, and a cooling water supply system. Each offers the advantages of instant on-off power supply capability and modular design. Modular design provides the flexibility to meet a broad range of Air Force mission requirements without adverse impact on performance or development schedule and cost.