| 摘要 |
PURPOSE:To moderate the poisoning of electrode catalyst by increasing or decreasing reformed gas supply amount, if CO concentration deviates from an allowable value, depending on its deviation. CONSTITUTION:A fuel cell mainframe 1 is an accumulator that the unit cells of a phosphoric-acid type fuel cell battery with an oxidant electrode 1b and a fuel electrode 1a are accumulated. A reformed gas supply device 2 supplies reformed gas 3 to the fuel electrode 1a. An impurities gas concentration detecting means 5 detects the concentration of carbon monoxide CO contained in the reformed gas 3 and outputs an output signal 5a. A thermocouple 6 detects the temperature of the mainframe 1 and outputs an output signal 6a and a reactive gas supply amount control device 7 outputs a signal 7a in terms of the supply amount of the reformed gas 3 and reactive air corresponding to the load quantity of the mainframe 1. A fuel cell supply amount control device 8 finds an allowable reformed gas CO concentration value. When the concentration value deviates from the allowable value, the output signal 8a is output to the control device 7 to increase or decrease the reformed gas supply amount depending on its deviation, so that the poisoning of electrode catalyst can be moderated. |
