Phosphoric acid fuel cells in Japan

• Published in: Journal of power sources 1996-07, Vol.61 (1), p.73-77
• Main Authors: Hojo, Naoji, Okuda, Makoto, Nakamura, Masanori
• Format: Article
• Language: English
• Subjects: Applied sciences; Energy; Energy. Thermal use of fuels; Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc; Exact sciences and technology; Fuel cells; Japan; Phosphoric acid fuel cells
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/S0378-7753(96)02339-7

Japanese gas companies have taken a keen interest in the energy-saving characteristics and superior environmental friendliness of fuel cells; since 1972 they have vigorously pursued the development of phosphoric acid fuel cells (PAFCs) for on-site generation purpose. The Japan Gas Association has been contributing to these activities. At present, field tests are carried out on 55 units on PAFC systems with a total capacity of approximately 8000 kW, including a US-made 200 kW unit, and Japanese-made 50, 100, 200 and 500 kW units. 24 units of PAFC systems out of 55 units have received a subsidy from the national government as a NEDO Field Test Project. In addition, a 1000 kW unit constructed with the assistance of a national government subsidy is to begin operation in 1995. As the results of field operations of many PAFC systems, valuable data on performance and durability were obtained, and useful maintenance techniques were accumulated towards commercialization. Both hardware and software of PAFC systems have been greatly improved, reflecting the experience gained from field operation. The durability of the cell stack differs with manufacturers and system models. For certain models of 200 kW systems, the performance almost satisfies the target of 20 000 h operation. One of the future tasks is to verify the durability of PAFC systems for 40 000 h operation. Another one is manufacturing cost reduction.