| 摘要 |
PURPOSE:To be able to set arbitrarily hydrogen utilization of a fuel cell and to optimize the total efficiency of a plant by controlling the burner fuel quantity of a reformer depending on the electric load of the fuel cell in addition to the temperature of the reformer. CONSTITUTION:The output of an active power detecting part 71 is increased by increase of an electric load, and thereby an operation part 70 calculates the setting valve for opening rate of a valve, and increases the valve opening rate of a fuel gas flow adjusting valve V4 via a flow controller C4. At the same time, the setting value to decrease the valve opening rate of a valve V6 is presented to a flow controller C6 of a burner fuel adjusting valve V6. As a result, much of fuel is supplied to a burner 51 and the output of a reformer is controlled so as to increase. Since the pressure of a fuel chamber of a fuel cell is controlled in a constant value fromthe intention for preventing excess differential pressure, as a result of the control of a pressure adjusting valve V5, the burner fuel flow quantity varies. This variation is slightly controlled with a flow controller C6 by a feedback signal from a flow quantity measuring part Q6. |
