Aes Cells In Sofc Power Generation Systems

AES cells have been tested in two 25 kW systems, each consisting of 576 50-cm active length cells (with EVD electrolyte, EVD fuel electrode, and plasma sprayed interconnection). One system was operated at the Southern California Edisori Company's Highgrove Generating Station, under a program with the U.S. Department of Defense's Advanced Research Projects Agency (ARPA). This system-was successfully operated for 5,582 h before the project completion. During this time, the system endured five thermal cycles to room temperature, produced up to 27 kW on three different fuels (natural gas, DF-2 diesel, and JP-8 jet turbine fuel), and showed no evidence of performance degradation.

The other system, built for a consortium of Osaka Gas and Tokyo Gas, is still under operation and has passed 8,800 h (>1 year) of successful operation on natural gas without any performance degradation. During this period, the unit has achieved 25 kW of power output and has endured five thermal cycles to ambient temperature.

A 100 kW SOFC power generation system is presently being built for delivery to a consortium of Dutch and Danish utilities (EDB/ELSAM). The system utilizes state-of-the-art AES cells (2.2 cm diameter, 150 cm active length) with plasma sprayed interconnections.

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