Abstract: An integrated system for air-cooling a main air blower drive motor and electronic control module in a fuel cell plant support module (PSM) disposed in an enclosure. Process air is drawn by a main blower fan into the enclosure through a filter and then is drawn from the enclosure into the blower via a first shroud surrounding the electronics process control module (ECM) and a second shroud surrounding the blower motor. The air cools these components and is thereby desirably warmed before being directed to the fuel cell assembly via an air distribution system. Thus, the PSM is constantly cooled and purged through the downstream processes, and the incoming air is constantly warmed by recovered heat from the PSM.

Abstract: A fuel cell system having a gas-liquid separator that comprises (a) a housing defining an inlet, an outlet, and a longitudinal flow through passage extending between the inlet and the outlet; (b) a plurality of baffles arranged in longitudinally spaced serial relation in and along the passage and each blocking a portion of the cross section of the passage; and (c) means mounting the baffles for relative movement to selectively vary the composite cross-sectional blockage defined by the baffles relative to a sensed parameter of the fuel cell system.

Abstract: An integrated system for air-cooling a main air blower drive motor and electronic control module in a fuel cell plant support module (PSM) disposed in an enclosure. Process air is drawn by a main blower fan into the enclosure through a filter and then is drawn from the enclosure into the blower via a first shroud surrounding the electronics process control module (ECM) and a second shroud surrounding the blower motor. The air cools these components and is thereby desirably warmed before being directed to the fuel cell assembly via an air distribution system. Thus, the PSM is constantly cooled and purged through the downstream processes, and the incoming air is constantly warmed by recovered heat from the PSM.

Abstract: A solid-oxide fuel cell system having an integrated air supply system, including a central air pump, distribution manifold, air control valves, mass air flow sensors, and supply ducts, for controllably supplying oxygen for the fuel cell reaction, both through and controllably bypassing cathode air heat exchangers; combustion air for a combustor of tail gas from the anodes; cooling air for electronic controls; and reforming air to a liquid fuel vaporizer integral with a hydrocarbon fuel reformer.

Abstract: A fuel cell system including a compact, low-pressure-drop, high efficiency water-separator for separating liquid water from water-laden streams of the system. A cyclonic separator includes a sump for collecting the water, a drain for removing the water from the sump and directing it to a reservoir, a shutoff valve associated with the drain for controlling flow through from the drain, and a water level switch that controls the opening/closing of the valve. The switch triggers closing of the valve before the sump is emptied to provide a water seal that prevents escape of gas through the drain.

Abstract: A water separator especially suitable for use in a vehicular fuel cell system. The separator comprises a housing defining an inlet, an outlet, and a longitudinal through passage extending therebetween. A central shaft extends along the passage and a plurality of modular baffles are stacked on the shaft. Each baffle includes an annular hub portion received on the shaft and a plurality of circumferentially spaced vanes extending outwardly from the hub portion to block a portion of the cross-sectional area of the passage. An actuator drives one end of the shaft and alternate baffles are keyed to the shaft so that actuation of the actuator relatively rotates the modular baffles to selectively vary the cross-sectional blockage defined by the baffles.

Abstract: A water separator especially suitable for use in a vehicular fuel cell system. The separator comprises a housing defining an inlet, an outlet, and a longitudinal through passage extending therebetween. A central shaft extends along the passage and a plurality of modular baffles are stacked on the shaft. Each baffle includes an annular hub portion received on the shaft and a plurality of circumferentially spaced vanes extending outwardly from the hub portion to block a portion of the cross-sectional area of the passage. An actuator drives one end of the shaft and alternate baffles are keyed to the shaft so that actuation of the actuator relatively rotates the modular baffles to selectively vary the cross-sectional blockage defined by the baffles.