초록 ▼

An ambient pressure fuel cell system is provided with a fuel cell stack formed from a plurality of fuel cells having membrane/electrode assemblies (MEAs) that are hydrated with liquid water and bipolar plates with anode and cathode sides for distributing hydrogen fuel gas and water to a first side o

An ambient pressure fuel cell system is provided with a fuel cell stack formed from a plurality of fuel cells having membrane/electrode assemblies (MEAs) that are hydrated with liquid water and bipolar plates with anode and cathode sides for distributing hydrogen fuel gas and water to a first side of each one of the MEAs and air with reactant oxygen gas to a second side of each one of the MEAs. A pump supplies liquid water to the fuel cells. A recirculating system may be used to return unused hydrogen fuel gas to the stack. A near-ambient pressure blower blows air through the fuel cell stack in excess of reaction stoichiometric amounts to react with the hydrogen fuel gas.

대표청구항 ▼

[ What is claimed is:] [1.] An ambient pressure fuel cell system comprising:a fuel cell stack comprising a plurality of fuel cells having membrane/electrode assemblies, MEAs, that are hydrated with liquid water and bipolar plates with anode and cathode sides for respectively distributing hydrogen fu

[ What is claimed is:] [1.] An ambient pressure fuel cell system comprising:a fuel cell stack comprising a plurality of fuel cells having membrane/electrode assemblies, MEAs, that are hydrated with liquid water and bipolar plates with anode and cathode sides for respectively distributing hydrogen fuel gas and liquid water to a first side of each one of said MEAs and ambient air with reactant oxygen gas to a second side of each one of said MEAs, where said fuel gas and liquid water are provided separately to channels to said anode side of each said MEA;a liquid water supply to said fuel cells for hydrating said MEAs;a hydrogen fuel gas supply; anda near-ambient pressure blower for blowing air in excess of reaction stoichiometric amounts through said fuel cell stack to provide oxygen for electrochemical reaction at said cathode side and evaporative cooling at said cathode side of each fuel cell.