PURPOSE: To enhance the rate of crude fuel utilization by issuing an incremental command and emitting a change rate suppress signal at the rise of the electric power set value for the crude fuel rate of flow and the rate of air flow.
CONSTITUTION: To a flow rate control part 9, a crude fuel rate-of-flow set value calculation part 17 gives a crude fuel flow rate command 17S which is prepared by adding a crude fuel increment signal 16F and the margin to the rate of crude fuel flow obtained by multiplying the amperage given by a current sensor 6 with a certain factor, and the rate of crude fuel flow supplied to a fuel reforming device 2 is increased. In the same manner, an air flow rate comand 18S prepared by adding the maggin and air increment amount signal 16A to the rate of air flow obtained by multiplication of the amperage of the sensor 6 with a factor is given to an air supply device 3, and the rate of air flow as the oxidating agent to the fuel cell 1 is increased. Signals 16F, 16A are emitted, and increase of the gas and air takes place, and thereby the marginal portions of the air and gas which have been added at all times according to the conventional arrangement can be reduced to a great extent, and the rate of crude fuel utilization can be accordingly enhanced.
IWASA NOBUHIRO
KATO HIROSHI
NAGAI TETSUYA
OSAKA GAS CO LTD
TOHO GAS KK
FUJI ELECTRIC CO LTD