| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve fuel efficiency and power generation performance at high temperatures of a fuel cell unit. <P>SOLUTION: A fuel cell system returns and utilizes a fuel off gas exhausted from a fuel cell unit comprising a fuel cell which generates power by an electrochemical reaction between supplied fuel gas and oxidant gas. The fuel cell system comprises a fuel gas supply passage supplying the fuel cell with the fuel gas, a return passage returning the fuel off gas to the fuel gas supply passage, a steam separator disposed on the return passage and separating and removing moisture from the fuel off gas, a bypass passage making the fuel off gas bypass the steam separator to flow back to the fuel gas supply passage, and a control switching between a state of returning the fuel off gas to the fuel gas supply passage through the bypass passage and a state of returning the fuel off gas without bypassing according to the dryness of the fuel cell. <P>COPYRIGHT: (C)2012,JPO&INPIT |
