| 摘要 |
PURPOSE:To prevent any accidents by detecting contamination by minute amounts of fuel gas and oxidant gas which develop in an emergency such as cell disorder by installing a CO2 gas detector near the cell body in a piping on the outlet side of an air electrode. CONSTITUTION:A fuel cell body 1 is constituted by installing catalyst layers 12 and 13 on both sides of an electrolyte layer 11 before a fuel and an air electrode 14 and 15 respectively are installed on the catalyst layers 12 and 13. When methane of 100% purity for example is taken as a fuel from the inlet 21 of a fuel reformer 2, reformed gas existing in the outlet of the reformer 2 is composed of carbon dioxide, about 70% hydrogen and a little less than 0.2% carbon nonoxide. If any bad condition arises in the catalyst layer 11 producing contamimation by a minute amount of gas between the fuel and the air electrode sides, increase in carbon dioxide concentration is detected with a carbon dioxide detector 3 installed near the outlet 25 of the air electrode 15 thereby enabling the bad condition to be known. This enables gas leakage to be detected earlier than a hydrogen detector and secures the safety of the device. |
