SOLID POLYMER TYPE FUEL CELL SYSTEM EMPLOYING MOISTURIZING MEANS FOR MOISTURIZING FUEL GAS AND OXIDIZER GAS, AND ITS OPERATION METHOD

摘要

PURPOSE: Provided are a solid polymer type fuel cell system which is used for the rating operation operated with a low current density and can supply a stable power for a long time, and its operation method. CONSTITUTION: The solid polymer type fuel cell system comprises a fuel cell which is generated by operating a certain generating part at a certain temperature by supplying a fuel gas and an oxidizer gas; and a moisturizing means for moisturizing the fuel gas and the oxidizer gas, wherein the fuel gas and the oxidizer gas are is moisturized to have a dew point higher than the certain temperature by the moisturizing means and is supplied into the fuel cell. Preferably the certain generating part is a part where the fuel gas and the oxidizer gas are consumed at first in the electrochemical reaction for the generation. Preferably the dew point is in a range from the certain temperature to a temperature not inducing the flooding phenomenon at the fuel cell.