| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent inflow of condensed water produced in a fuel cell system circulating fuel gas to a fuel electrode of a fuel cell into a circulation device. <P>SOLUTION: The fuel cell system is equipped with a gas water separating device 17, and circulation device supply pipings 31, 32 installed between the gas water separating device 17 and a circulation device 19, and circulating and guiding exhaust fuel gas from which liquid water is separated and removed with the gas water separating device 17 to the the circulation device 19, and a control means changing over the circulation device supply pipings 31, 32 so that the piping whose inside is made in a dry state out of the circulation device supply pipings 31, 32 becomes the piping guiding the exhaust fuel gas from which liquid water is separated and removed with the gas water separating device to the circulation device 19 according to transition of an operation state of the fuel cell system 1 from an operation state in which production of condensed water in the circulation device supply piping 31 or 32 is estimated to an operation state in which inflow of produced condensed water into the circulation device 19 is estimated. <P>COPYRIGHT: (C)2007,JPO&INPIT |
