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US 9,040,207 B2Granted
Method for operating a high-temperature fuel cell
AssigneeAVL List GmbH
InventorsPeter Prenninger, Juergen Rechberger
Life of this patent
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AssigneeAVL List GmbH
InventorsPeter Prenninger, Juergen Rechberger
Estimating the term…
In a method for operating a high-temperature fuel cell, which in normal mode of generating electrical power is supplied with liquid fuel, preferably diesel oil, and is preceded on the anode side by a reformer for liquid fuel, where at least part of the hot anode exhaust gas is recirculated into the anode circuit via a recirculation line. Upstream of a compressor preceding the reformer the liquid fuel is sprayed or injected into the hot anode exhaust gas, the quantity of air needed for reforming the liquid fuel being added to the mixture of anode exhaust gas and fuel. On change-over from normal operational mode to standby mode without power generation, the supply of liquid fuel and air is stopped and the gas mixture present in the anode circuit be permanently circulated. A defined amount of air being introduced into the anode circuit in order to remove deposits and contaminations in the high-temperature fuel cell following standby operation.
A method for operating a high-temperature fuel cell, which in normal operation mode of generating electrical power is supplied with liquid fuel, and is preceded on an anode side by a reformer for the liquid fuel, where at least part of hot anode exhaust gas of the fuel cell is recirculated into an anode circuit via a recirculation line, and where upstream of a compressor preceding the reformer the liquid fuel is sprayed or injected into the hot anode exhaust gas, a quantity of air needed for reforming the liquid fuel being added to the mixture of anode exhaust gas and fuel, wherein on change-over from normal operation mode to standby operation mode without power generation the supply of liquid fuel and air is stopped and the gas mixture present in the anode circuit is permanently circulated, and that—following standby operation mode—a defined amount of air is introduced into the anode circuit for removing deposits and contaminations in the high-temperature fuel cell.
A method for operating a high-temperature fuel cell, which in normal operation mode of generating electrical power is supplied with liquid fuel, and is preceded on an anode side by a reformer for the liquid fuel, where at least part of hot anode exhaust gas of the fuel cell is recirculated into an anode circuit via a recirculation line, and where upstream of a compressor preceding the reformer the liquid fuel is sprayed or injected into the hot anode exhaust gas, a quantity of air needed for reforming the liquid fuel being added to the mixture of anode exhaust gas and fuel, wherein on change-over from normal operation mode to standby operation mode without power generation the supply of liquid fuel and air is stopped and the gas mixture present in the anode circuit is permanently circulated, and that—following standby operation mode—the recirculation line for the anode exhaust gas is closed and air is directly supplied to the anode circuit upstream of the reformer for removing deposits and contaminations in the high-temperature fuel cell.
Dependencies are inferred from the claim text.