摘要:
To mitigate bubble blockage in water passageways (78, 85), in or near reactant gas flow field plates (74, 81) of fuel cells (38), passageways are configured with (a) cross sections having intersecting polygons or other shapes, obtuse angles including triangles and trapezoids, or (b) hydrophobic surfaces (111), or (c) differing adjacent channels (127, 128), or (d) water permeable layers (93, 115, 116, 119) adjacent to water channels or hydrophobic/hydrophilic layers (114, 120), or (e) diverging channels (152).
摘要:
To mitigate bubble blockage in water passageways (78, 85), in or near reactant gas flow field plates (74, 81) of fuel cells (38), passageways are configured with (a) intersecting polygons, obtuse angles including triangles, trapezoids, or (b) hydrophobic surfaces (111), or (c) differing adjacent channels (127, 128), or (d) water permeable layers (93, 115, 116, 119) adjacent to water channels or hydrophobic/hydrophilic layers (114, 120).
摘要:
Fuel cells (38) have water passageways (67; 78, 85; 78a, 85a) that provide water through reactant gas flow field plates (74, 81) to cool the fuel cell. The water passageways may be vented to atmosphere (99), by a porous plug (69), or pumped (89, 146) with or without removing any water from the passageways. A condenser (59, 124) receives reactant air exhaust, may have a contiguous reservoir (64, 128), may be vertical, (a vehicle radiator, FIG. 2), may be horizontal, contiguous with the top of the fuel cell stack (37, FIG. 5), or below (124) the fuel cell stack (120). The passageways may be grooves (76, 77; 83, 84) or may comprise a plane of porous hydrophilic material (78a, 85a) contiguous with substantially the entire surface of one or both of the reactant gas flow field plates. Air flow in the condenser may be controlled by shutters (155). The condenser may be a heat exchanger (59a) having freeze-proof liquid flowing through a coil (161) thereof, the amount being controlled by a valve (166). A deionizer (175) may be used.
摘要:
Fuel cells (38) have minute water passageways (67) that provide water through one or both reactant gas flow field plates (74, 82) of each fuel cell, whereby the fuel cell is cooled convectively. The water passageways (67; 78, 85; 78a, 85a) may be vented by a porous plug (69), or by a microvacuum pump (89) that does not pump any water from the passageways, or simply vented (99) to atmosphere. A condenser (59) may have a contiguous reservoir (64); the condenser (59) may be vertical, such as a vehicle radiator (FIG. 1), or may be horizontal, contiguous with the top of the fuel cell stack (37, FIG. 5). The passageways may be grooves (76, 77; 83, 84) in the reactant gas flow plates (75, 81) or the passageways may comprise a plane of porous hydrophilic material (78a, 85a) contiguous with substantially the entire surface of one or both of the reactant gas flow field plates.
摘要:
A method of operating a power generating system including a fuel cell coupled to an electrical buffer, wherein the fuel cell is further coupled to a steam reformer, comprising adjusting operation of the reformer based on a voltage affected by the electrical buffer while maintaining a steam to carbon ratio of the reformer to control charging of the electrical buffer by the fuel cell.
摘要:
Embodiments of thermally integrated HT PEM fuel cell systems are disclosed. In one disclosed embodiment, a fuel cell system comprises a fuel cell, a fuel processor configured to form a processed fuel for the fuel cell, and a thermal management system comprising a heat transfer fluid circulation loop that circulates a heat transfer fluid through the fuel cell and through the fuel processing system in a common loop.
摘要:
Embodiments related to fuel cells and membrane-electrode assemblies for fuel cells are disclosed. In one disclosed embodiment, a membrane-electrode assembly includes a catalyzed anode material and a membrane disposed in face-sharing contact with the catalyzed anode material. The membrane comprises mutually interpenetrating first and second phases, the first phase supporting an ionic conduction through the membrane, and the second phase supporting a dimensional structure of the membrane. The membrane-electrode assembly also includes a catalyzed cathode material disposed in face-sharing contact with the membrane, opposite the catalyzed anode material. Two opposing flow plates are also provided, each flow plate configured to distribute a reactant gas to a catalyzed electrode material of the membrane-electrode assembly. Other embodiments provide variants on the membrane-electrode assembly and methods to make the membrane-electrode assembly.
摘要:
A method of operating a power generating system including a fuel cell coupled to an electrical buffer, wherein the fuel cell is further coupled to a steam reformer, comprising adjusting operation of the reformer based on a voltage affected by the electrical buffer while maintaining a steam to carbon ratio of the reformer to control charging of the electrical buffer by the fuel cell.
摘要:
A method for manufacturing a stator (24) for an electrostatic loudspeaker in which at least a part of a structure (28) for forming the stator (24) is moulded from an electrically insulating material. This structure (28) may be a frame of the stator. To complete the stator (24), electrically conductive portions (30) are combined with the moulded structure to form a complete structure that includes an electrically conductive grid (29). The electrically conductive portions (30) may be a preformed grid (29). The frame (28) and the grid (29) may be press-fitted together. Alternatively the moulded structure may be electrically conductive, and electrically insulating portions may be combined with it to form a complete stator. Manufacture of electrostatic loudspeaker stators using a moulding process allows for relatively low cost production methods that can repeatedly achieve a required high degree of accuracy.
摘要:
What is disclosed is a method of constructing a pager bag having looped attachments wherein the method comprises forming a predetermined construction from paper bag paper.