A fuel cell system includes: a fuel cell; a fuel gas supply path supplying the fuel gas to the fuel cell; a recycling path returning discharged anode off-gas to an entrance of the fuel cell; an anode off-gas discharge path branching from the recycling path and discharging the anode off-gas to an outside; a first valve in the anode off-gas discharge path; a pressurizer pressurizing the anode off-gas; and a controller performing control to cause the pressurizer to act in at least one of a timing in execution of a purge action supplying the fuel gas from the fuel gas supply path and discharging the anode off-gas to the outside in a first valve open state and a timing in prescribed time after the purge action and assessing abnormality based on a pressure of the recycling path or anode off-gas discharge path or an action amount of the pressurizer.

A fuel cell system and a control method thereof are disclosed. The system includes a fuel cell stack having an anode and a cathode, an anode recirculation loop including the anode, a fuel supply device for providing a fuel gas via a fuel feed path, an air supply device for providing air to the cathode, an anode blower and a switching element. The loop has a first path and a second path, and the anode is arranged in the second path. During normal operation of the system, the fuel feed path and the first path are combined to form the second path, and the second path is split into the first path and a fuel exhaust path. The anode blower is configured for driving circulation through the loop. The switching element is located in at least one of the first path and the combining point and is configured to force the fuel gas to flow through the second path to the fuel exhaust path in the event of failure of the anode blower.

A method of controlling energy in a datacenter includes receiving a fuel cell operating percentage of an operating capacity of the fuel cell, receiving a fuel cell exhaust temperature, receiving a hot aisle air temperature from a hot aisle of a server computer, determining a temperature delta between the hot aisle air temperature and the fuel cell exhaust temperature, and then allocating virtual machine placements to change a server user percentage relative to a server user capacity percentage target value to optimize the fuel cell operating percentage relative to the fuel cell efficiency target value, the temperature delta relative to the thermoelectric generator efficiency target value, and the server user percentage relative to the server user capacity percentage target value.

A method for reducing cell degradation in a fuel cell system includes adding oxygen-containing gas to a fuel in the anode chamber to prevent an increase in a cell voltage above a predetermined maximum value.

A fuel cell system includes an anode gas supply device configured to supply an anode gas to a fuel cell and an ejector configured to merge an anode discharged gas, discharged from the fuel cell; with the anode gas to be supplied to the fuel cell. The fuel cell system includes an actuator configured to supply the anode discharged gas to the ejector and a cathode gas supply device configured to supply a cathode gas to the fuel cell. A control method for A fuel cell system includes a cathode gas control step of controlling a pressure of the cathode gas to be supplied to the fuel cell according to a magnitude of a load that is required of the fuel cell, and an anode gas control step of increasing a differential pressure between the pressure of the cathode gas and a pressure of the anode gas by the anode gas supply device when the load is low compared to when the load is high.

A fuel cell system includes a supply channel having first channels respectively connected with tanks, and a second channel merged with each of the first channels; first on-off valves of the first channels; a second on-off valve of the second channel; and a controller configured to control opening and closing of the first on-off valves and the second on-off valve. In a state where the second on-off valve is closed, the controller supplies first electric power used for opening the first on-off valve against a first differential pressure to at least one first on-off valve, and supplies second electric power, smaller than the first electric power and used for opening the first on-off valves against a second differential pressure smaller than the first differential pressure, to the first on-off valves other than the at least one first on-off valve.

An apparatus for controlling driving of a fuel cell vehicle and a method thereof are provided. The apparatus includes a fuel cell stack that generates electricity using a chemical reaction between hydrogen and oxygen and a pressure sensor that measures a pressure of hydrogen supplied to the fuel cell stack. A controller determines whether a current limit is caused by a failure of the fuel cell stack or a measurement error of the pressure sensor when the current limit occurs in the fuel cell stack.

A fuel cell system includes a fuel cell, a supply flow passage and a discharge flow passage for anode gas, a gas-liquid separator, a discharge valve, a differential pressure detection unit configured to detect a differential pressure between an upstream side and a downstream side of the discharge valve, and a control unit. The control unit is configured to estimate an effective cross-sectional area of the discharge valve for the anode off-gas, which is decreased by an amount of water flowing into the gas-liquid separator and flowing out from the discharge valve, based on the differential pressure, and to estimate a discharge amount of the anode off-gas based on the estimated effective cross-sectional area.

A system for regulating the pressure of a high-temperature electrolysis or co-electrolysis (HTE) reactor or a fuel cell (SOFC) operating under pressure. The operation of the system includes: regulating the DH wet gas flow upstream of one of the chambers so as to ensure the electrochemical stability of the predetermined operating point; regulating the DO gas flow upstream of the at least one second chamber so as to ensure gas scavenging in the at least one second chamber, and in the enclosure; regulating the flow of second gas circulating in the enclosure, downstream of the enclosure, so as to ensure the detection of leaks and safety in relation thereto and to prevent the formation of an explosive atmosphere; and controlling the pressure, by means of the regulation valves arranged downstream of the stack, on the gases, including the wet gas, which are also generally hot.

When setting a requested operating point of a compressor that supplies oxidizing gas to a fuel cell by a target flow rate and a target pressure ratio, a control section of a fuel cell system sets the target pressure ratio to be equal to or higher than a minimum pressure ratio corresponding to the target flow rate using a predetermined operation characteristic in which a minimum pressure ratio that can be realized to the flow rate that can be discharged from the compressor. In the case where a condition under which it should be determined that the minimum value of the pressure ratio in an actual operation characteristic of the compressor differs from the minimum pressure ratio in the predetermined operation characteristic is satisfied, the control section updates the minimum pressure ratio in the predetermined operation characteristic using the minimum value of the pressure ratio in the actual operation characteristic.