Patent ID: 8481221

Claim:
A fuel cell system comprising: a fuel supply unit which supplies a fuel containing hydrogen; an air supply unit which supplies air containing oxygen; a stack including a fuel inlet connecting a fuel path within the stack to the fuel supply unit, an air inlet connecting an air path within the stack to the air supply unit, and membrane electrode assemblies (MEAS), each MEA having a unit cell including an anode and a cathode separated by a polymer electrolyte membrane, and a pair of separators respectively forming the fuel path and the air path at the anode and the cathode; a gas-liquid separator connected to an outlet of the fuel path and an outlet of the air path and which separates a gas-liquid emitted from the air and fuel paths into a high-temperature liquid and a high-temperature moisture gas; a mixer which mixes the high-temperature liquid separated by the gas-liquid separator and the fuel supplied from the fuel supply unit and which is connected to the gas-liquid separator and the fuel inlet of the fuel path for supplying the mixture to the fuel path; a moisture absorbent connected to the gas-liquid separator and through which passes the high-temperature moisture gas separated by the gas-liquid separator to absorb liquid condensed from the high-temperature moisture gas; and a heat exchanger disposed at one side of the moisture absorbent to vaporize the liquid absorbed by the moisture absorbent by passing high-temperature dry air through the moisture absorbent.