| 摘要 |
An arrangement is provided in a fuel cell power plant ( 10 ) for dispensing ( 58 74, 60, 64 ) a liquid medium, such as water ( 66 ), into a process oxidant (air) stream ( 53 ) that flows through one gas channel ( 42 ) in an energy recovery device (ERD) ( 32 ). An exhaust gas stream ( 48 ) containing heat and moisture from the fuel cell ( 12 ) flows through another channel ( 44 ) in the ERD. An enthalpy exchange barrier ( 46 ) separates the one and the other gas channels, but allows mass and/or heat transfer therebetween. The water is injected into the air stream ( 53 ) in a controlled ( 70, 74 ) amount, and perhaps temperature ( 78 ), in response to sensed parameters ( 80, 84, 90 ) of the power plant, including the process air stream, to adjust one or more conditions in the power plant. Controlling ERD dryness, providing a defrost capability for the ERD, and/or preventing excessive water accumulation in the system are several of the conditions controlled. |
