| 摘要 |
Fuel cells ( 38 ) have water passageways ( 67; 78, 85; 78 a, 85 a) 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 ( 78 a, 85 a) 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 ( 59 a) having freeze-proof liquid flowing through a coil ( 161 ) thereof, the amount being controlled by a valve ( 166 ). A deionizer ( 175 ) may be used. |
