| 摘要 |
PROBLEM TO BE SOLVED: To enable accurately controlling the flow rate of feedwater and simplify the feedwater flow system. SOLUTION: A cooling water circulation system 20 is equipped with a body of fuel cell 21, a steam separator 22, and a cooling water-circulating pump 23, and by circulating the cooling water eliminates heat evolving from the fuel cell body, evolves steam in the steam separator, which steam is drawn off by a steam-drawing off system 26 and used for reforming or pressure control (release). A feedwater system 25 feeds water to the steam separator. A measuring part 26 takes generated current measurement, generated voltage measurement, water-level measurement, steam flow-rate measurement, feedwater flow- rate, etc., a controller 27 provided with a change-delaying device 28 calculates the respective measurements, and the results are used as control signals for controlling the operation of the fuel cell body, steam separator, steam drawing off system, and feedwater system. Water level is controlled by deciding the controlled set water level of the steam separator in accordance with the calorific value of the fuel cell. |
