| 摘要 |
A defective operation of a valve ( 15, 35, 37, 39 ) in a drainage line ( 13, 21, 31, 33 ) of a fuel cell results in unintentionally permitting process gas to flow into the surrounding area of the fuel cells. In order to resolve this problem, the invention provides a method for monitoring the discharge of media out of a fuel cell and provides a fuel cell system, with which the gas and water stream flowing through the drainage line ( 25, 41 ) is monitored ( 65 ) by means of a Venturi nozzle ( 23, 40 ) that is connected to a differential pressure sensor ( 27, 53 ). The magnitude ( 67 ) and the temporal progression ( 69 ) of the differential pressure indicated by the differential pressure sensor ( 27, 53 ) establishes the basis for controlling the valve ( 15, 35, 37, 39 ) in the drainage line ( 13, 21, 31, 33 ) and for shutting down ( 71 ) the fuel cell block ( 1 ) in the event that the valve ( 15, 35, 37, 39 ) is defective. |
