Patent ID: 7615296

Claim:
A fuel cell system comprising: a fuel cell configured to generate power by consuming a fuel gas and having an outlet port through which the fuel gas that has not been consumed in the power generation flows out; a moisture removal unit having a water receiving section configured to accumulate condensed water generated from moisture contained in the fuel gas that has been sent through the outlet port, thereby removing the moisture contained in the fuel gas; a burner located downstream of said moisture removal unit, to combust the fuel gas; a gas pipe on off valve configured to open and close a pipe that makes said moisture removal unit and said burner communicate with each other and to close when the power generation stops; a fuel treating unit configured to generate the fuel gas from a raw material gas and vapor; a raw material gas feeder configured to supply the raw material gas to said fuel treating unit; a water level detector configured to detect a water level of the condensed water; and a controller configured to stop the raw material gas feeder based on a detection signal of said water level detector detecting that the water level is equal to or lower than a lower limit of the water level of the condensed water.