| 摘要 |
PURPOSE: A fuel cell is provided to enhance performance of humidifier by improving relative humidity. CONSTITUTION: A fuel system(100) comprises a stack(10), air supply unit(20) for supplying air to air electrode, humidifier(30) which humidifies feed air, hydrogen supplying unit(40) for supplying hydrogen to the fuel electrode, hydrogen recirculation unit(50) which supplies mixture of new hydrogen and exhausted hydrogen to the fuel electrode, cooling unit(60) for cooling the stack, heat exchange part(70) which lowers temperature of the exhausted air through heat and moisture exchange of the exhausted air and hydrogen, and increases temperature and relative humidity of the hydrogen, and a second heat exchanger(80) which lowers temperature of the exhausted air through heat exchange of cold water and exhausted air. |
