Patent ID: 8771885

Claim:
A fuel cell power plant comprising: a stack ( 37 ) of fuel cells ( 38 ), each fuel cell having coolant passageways ( 78 , 85 ) connected between a coolant inlet ( 66 ) and a coolant outlet ( 68 ), a fuel reactant gas flow field plate ( 75 ) connected between a fuel inlet ( 42 ) and a fuel outlet ( 47 ), an oxidant reactant gas flow field plate ( 81 ) connected between an air inlet ( 53 ) and an air outlet ( 57 ), at least one of said plates being porous and hydrophilic, and a membrane electrode assembly, including anode and cathode catalysts, disposed between said flow field plates; and a controller ( 79 ; characterized by: a condenser ( 59 ); said coolant inlet ( 66 a ) includes a gas/liquid separator ( 107 / 108 ) having a gas exhaust outlet controlled by said controller; and fluid communication between said air outlet ( 57 ), through said condenser, to said coolant inlet ( 66 a ).