| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technology capable of appropriately restraining the volume of fuel gas exhausted together with impurity. <P>SOLUTION: A second FC 106 generates power by hydrogen gas contained in anode off-gas in a piping 104, and an electromagnetic valve 108 closes the piping 104 with a force corresponding to the generated power of the second FC 106. By the above, the lower the density of hydrogen contained in the anode off-gas is, and the higher the density of nitrogen is, the more is the volume of the anode off-gas exhausted outside the system, and the higher the density of hydrogen contained in the anode off-gas is, and the lower the density of nitrogen is, the fewer is the volume of the anode off-gas exhausted outside the system. Consequently, the nitrogen as an impurity can be exhausted while restraining the exhaustion of hydrogen as a fuel to the utmost. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
