An integrated power generation and exhaust processing system includes a fuel cell system configured to generate power and to separate CO.sub.2 included in exhaust output from the fuel cell system, and an exhaust processing system configured to at least one of sequester or densify CO.sub.2 separated from the exhaust output from the fuel cell system.

An apparatus for removing moisture of a stack enclosure includes a protective case accommodating a fuel cell stack therein, a radiation heater mounted at a lower surface of the protective case, the radiation heater enabling discharged air to move toward an upper part of the protective case, and a cooler for cooling air moving along the upper part of the protective case, the cooler guiding cooled air to move toward the lower surface of the protective case.

A device and a method for detecting a water level of a water trap in a fuel cell can accurately output a water level of water collected in the water trap by reaction of the fuel cell. The device and the method for detecting a water level of a water trap can detect a change in a surrounding temperature of a water level sensor by mounting a separate temperature sensor in the water level sensor and accurately output the water level in the water trap regardless of the change of the surrounding temperature through a water sensor output value correction algorithm based on a detected temperature.

A fuel cell system has a cell (1) that is capable of generating electric power. The cell (1) has a fuel electrode (1a), an air electrode (1b) and an electrolyte (1c). The fuel electrode (1a) is supplied with hydrogen obtained by reforming fuel gas. The air electrode (1b) is supplied with oxygen in the air. The electrolyte (1c) is interposed between the fuel electrode (1a) and the air electrode (1b) to enable oxygen ions to pass through to the fuel electrode (1a). A water vapor retaining mechanism (6) is disposed in a flow path of the fuel gas supplied to the fuel electrode (1a). The mechanism (6) retains water vapor generated in the fuel electrode (1a) during electric power generation by the cell (1). The mechanism (6) enables the water vapor to be mixed with the fuel gas.

A fuel cell system that generates electric power by supplying anode gas and cathode gas to a fuel cell includes a control valve adapted to control the pressure of the anode gas to be supplied to the fuel cell; a buffer unit adapted to store the anode-off gas to be discharged from the fuel cell; a pulsation operation unit adapted to control the control valve in order to periodically increase and decrease the pressure of the anode gas at a specific width of the pulsation; and a pulsation width correcting unit adapted to correct the width of the pulsation on the basis of the temperature of the buffer unit.

An evaporative cooling type fuel cell system and a cooling control method for the same are provided. The fuel cell system includes a stack that generates electric power by reacting hydrogen as fuel with air as an oxidant. The method includes adjusting an operation pressure of the stack based on a current operation temperature of the stack and adjusting the amount of water supplied to the stack from a water reservoir based on the current operation temperature. The water is supplied to a cathode of the stack. Thus, a compact-simplified fuel cell system is provided, thereby reducing manufacturing costs and weight.

A drain tube device of a muffler for a fuel cell vehicle includes: the muffler included in an exhaust pipe of the fuel cell vehicle and having a front end part to which blower air is introduced and a rear end part from which the blower air is discharged; a drain tube having a drain hole disposed between the front end part and the rear end part of the muffler to downwardly discharge the blower air; and a hole cover part mounted in the drain hole to block a hydrogen discharge of the blower air and discharge only condensate water. The drain tube device maintains functioning of the muffler while discharging the condensate water and smoothing a flow of the blower air through the hole cover part mounted in the drain hole upon starting the vehicle.

Provided is a fuel cell system including a fuel cell, a radiator that is provided in a circulation path of coolant that cools the fuel cell, a spray unit that sprays, toward the radiator, generated water that has been generated in and discharged from the fuel cell, and a heating unit that is provided in a supply path of the generated water from the fuel cell to the spray unit and heats the generated water.

A fuel cell system includes a fuel cell stack, a fuel gas supply channel, a circulation passage, a purge valve, and a temperature sensor. A method of operating the fuel cell system performs a judging step of determining whether or not the temperature detected by the temperature sensor is at or below a given temperature. Then, if the temperature is at or below the given temperature, the method performs a purge valve scavenging process step of intermittently opening and closing the purge valve multiple times, while supplying the fuel gas through the fuel gas supply channel.

A fuel cell device comprises a fuel cell stack which is formed from a plurality of unit cells stacked one above the other in a stacking direction, each unit cell having one or more media channels and a membrane electrode assembly that comprises a cathode, an anode, and a membrane arranged between the cathode and the anode, and comprising a media duct running substantially parallel to the stacking direction. The media duct is connected or can be connected to the fuel cell stack to conduct a medium into or out of the media channels of the unit cells of the fuel cell stack substantially laterally to the stacking direction. The media duct is formed as a functional component or such a functional component is integrated therein, which is formed to pre-treat the medium before it enters the media channels or to post-treat the medium after it has exited the media channels.