Abstract: A device and method for ensuring proper fuel cell system warmup or shutdown during freeze conditions. A three-way valve is used in conjunction with a flow-controlling orifice to ensure that the orifice avoids ice blockage during frozen conditions. Dry, warm air is delivered as a slip stream under pressure to a cathode flowpath, where the construction of the orifice is such that it is structurally compliant to promote flexing in response to the pressurized slip stream, thereby helping to break up any small amount of ice that may have formed in or on the orifice.

Abstract: An improved fuel cell system comprising a component designed to minimize or otherwise prevent the collection of water (and thus formation of ice at low temperatures) at valves or other anode exhaust flowpath control points. Thus, such system is configured to be operable under at least freeze start conditions. Also provided, in various embodiments, are methods of controlling ice blockage in a fuel cell system by, among other things, providing such a component.

Abstract: A device and method for ensuring proper fuel cell system warmup or shutdown during freeze conditions. A three-way valve is used in conjunction with a flow-controlling orifice to ensure that the orifice avoids ice blockage during frozen conditions. Dry, warm air is delivered as a slip stream under pressure to a cathode flowpath, where the construction of the orifice is such that it is structurally compliant to promote flexing in response to the pressurized slip stream, thereby helping to break up any small amount of ice that may have formed in or on the orifice.

Abstract: An improved fuel cell system comprising a component designed to minimize or otherwise prevent the collection of water (and thus formation of ice at low temperatures) at valves or other anode exhaust flowpath control points. Thus, such system is configured to be operable under at least freeze start conditions. Also provided, in various embodiments, are methods of controlling ice blockage in a fuel cell system by, among other things, providing such a component.

Abstract: Described is a method of conditioning a gas stream comprising passing the gas stream into a vessel 10 which contains a rotating enclosure 12 and which contains an apparatus 18 to rotate the enclosure, which enclosure is pressure sealed from the surrounding atmosphere and which is divided into a plurality of modulating zones 14, 16; treating the gas to modify its properties within the enclosures due to the presence of modulating materials 68 within the zones in the enclosure; and passing the modified gas to an outlet 24, 25 of the vessel. Also described is an apparatus for conditioning a plurality of gas streams.

Abstract: Described is a method of conditioning a gas stream comprising passing the gas stream into a vessel 10 which contains a rotating enclosure 12 and which contains an apparatus 18 to rotate the enclosure, which enclosure is pressure sealed from the surrounding atmosphere and which is divided into a plurality of modulating zones 14, 16; treating the gas to modify its properties within the enclosures due to the presence of modulating materials 68 within the zones in the enclosure; and passing the modified gas to an outlet 24, 25 of the vessel.

Abstract: A thermal management system for an electrochemical engine in a vehicle comprises a coolant pump and a radiator. The radiator is oriented substantially parallel to a plane defined by longitudinal and lateral vehicle axes and defined by an inlet face as the upper surface and an outlet face as the lower surface. The radiator is packaged in a rear underbody compartment of the vehicle to allow a large cooling surface area. An air duct delivers air from outside the vehicle to the inlet face of the radiator. A fan forces air from the air duct through the radiator. A coolant circuit extends between a fuel cell stack of the electrochemical engine, the coolant pump, and the radiator.