Disconnecting Procedure For Fuel Cell Systems
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Abstract
A method for shutting down a fuel cell system having at least one fuel cell, especially a fuel cell provided with a proton exchanging membrane, anode and cathode inlets, anode and cathode outlets, an anode recirculation circuit, a device which is operated according to the Venturi principle and is used to convey the gas in the anode recirculation circuit, and a hydrogen and air supply is disclosed. A method characterized by low emission values and high efficiency is provided. The hydrogen supply to the anode is interrupted during shutdown of the fuel cell system and the current generated from the residual hydrogen is supplied to an electric consumer.
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Citations
21 Claims
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1-9. -9. (canceled)
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10. A method for shutting down a fuel cell system, the fuel cell system having at least one fuel cell having an anode and a cathode, anode and cathode inlets, anode and cathode outlets, an anode recycle loop, a device for delivering gas in the anode recycle loop, and a hydrogen and air supply, the hydrogen supply to the anode being interrupted during shutdown and a current generated from residual hydrogen being supplied to an electrical consumer, the method comprising:
regulating pressure in the cathode so that the pressure in the cathode deviates from pressure in the anode maximally by a pressure Δ
pmax of 0.2 bar.- View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
Specification