Phosphoric Acid Fuel Cell PAFC

R&D on the use of phosphoric acid as an electrolyte for fuel cells began in the United States in the early 1960s. A field test program of 40 kW units was completed in 1986 and the system was commercialized in 1992 at a 200 kW capacity. The 200 kW unit weighs about 40,000 lbm (18,000 kg) and is 18 ft (5.5 m) long by 10 ft (3.0 m) high by 10 ft (3.0 m) wide. Performance of these units shows reasonable reliability, long life, and good efficiency. In addition, an 11 MW unit has been demonstrated for utility applications.

The PAFC produces low-grade thermal energy in the form of hot water and has an electric production efficiency range of 36 to 40%. Relatively low operating temperatures

Air (Oxygen Source)

Natural Gas

Fuel Processing

Section

Steam

DC Power

DC Power

Steam

Power

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