Electrochemical fuel cell system with a regulated vacuum ejector

Details Electrochemical fuel cell system with a regulated vacuum ejector Electrochemical fuel cell system with a regulated vacuum ejector

1994-12-23

1995-08-15

Skapars, Anthony

Chemistry: electrical current producing apparatus, product, and

Having magnetic field feature

429 25, H01M 804

Patent

active

054418216

ABSTRACT:
An electric power generation system has a regulated vacuum ejector for recirculating the fluid fuel stream. The system includes a fuel cell stack, a pressurized fuel supply having a pressure control valve for regulating the pressure of the fuel supply, a vacuum ejector interposed between the fuel supply and the stack fuel stream inlet, a pressure transducer interposed between the ejector discharge outlet and the stack fuel stream inlet, and a pressurized oxidant supply with a pressure transducer. The ejector suction inlet is fluidly connected to the fuel stream outlet of the fuel cell stack. The fuel stream pressure transducer transmits a signal to the pressure control valve to adjust the pressure of the fuel supply when the detected pressure of the fuel stream deviates from a predetermined value. The oxidant stream pressure transducer transmits a signal to the pressure control valve to adjust the pressure of the fuel supply when the detected pressure of the oxidant stream changes. The system is load-following to maintain uniform fuel stream pressure and recirculation ratio over a broad range of operating conditions. The system also maintains a balance between the pressure of the fuel stream and the pressure of the oxidant stream.

REFERENCES:
patent: 3180763 (1965-04-01), Miller et al.
patent: 3462308 (1969-08-01), Winters
patent: 3745047 (1973-07-01), Fanciullo et al.
patent: 4098959 (1978-07-01), Faniullo
patent: 4738903 (1988-04-01), Garow et al.
patent: 4904547 (1990-02-01), Mizumoto et al.
patent: 5059494 (1991-10-01), Vartanian et al.
patent: 5200278 (1993-04-01), Watkins et al.
patent: 5366821 (1994-11-01), Merritt et al.

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