| 摘要 |
PURPOSE:To reduce the pressure surge produced at the exchange of gas while to shorten the time required for start and stop, by feeding inert gas in a cell casing through a gate valve into the fuel chamber and oxidizing agent chamber of a fuel cell body at the start or stoppage. CONSTITUTION:At the start of a fuel cell, a fuel flow regulating valve 11a, oxidizing agent flow regulating valve 11b, a differential pressure regulating valve 13a between a cell casing 1 and a fuel chamber 3 and a differential pressure regulating valve 13b between the cell casing 1 and the oxidizing agent chamber 4 are closed while gate valves 15a, 15b are opened. Inert gas such as nitrogen is fed into the cell casing 1, fuel chamber 3, oxidizing agent chamber 4 through a system 7 to set the pressure in the cell casing 1 to the required operating level. Under this state, the pressure in said casing 1, fuel chamber 3 and oxidizing agent chamber 4 will be same thereby the differential pressure meters 14a, 14b will point at zero. Then the differential pressure regulating valves 13a, 13b are opened while the flow regulating valves 11a, 11b are opened and said gate into the fuel chamber 3 and oxidizing agent valves 15a, 15b are closed to feed the required amount of fuel oxidizing agent chamber 4 to produce power. |
