PURPOSE: To increase follow-up capability to load variation by estimating the correcting amount for following-up the temperature of a fuel reformer to a setting temperature according to load variation with a correcting amount estimating means, and synthesizing the correcting amount to a setting flow rate.
CONSTITUTION: A setting flow rate g calcurated with a fuel electrode setting flow rate computing element and a correcting amount l estimated with a correcting amount estimating means 10 are synthesized with a fuel electrode setting flow rate computing element comprising a fuel electrode flow rate control valve 2 installed in a line through which fuel gas is supplied to a fuel electrode of a fuel cell 3, a setting flow rate computing element 4 which calculates a setting flow rate g of the fuel electrode based on the output a of the fuel cell 3 and the representative temperature d of a fuel cell reformer 1, a setting temperature computing element 5, and a controller 7. The correcting amount l of the setting flow rate g is estimated with a correcting amount estimating means 10 based on a plurality of process status amounts k. The setting flow rate g and the correcting amount l are synthsized and the synthesized amount m is compared with the fuel electrode flow rate h, and a controller 9 outputs an opening instruction j by which the degree of opening of the fuel electrode flow rate control valve 2 is controlled based on the flow rate diviation i. Thereby, follow-up capability to load variation is increased.
MATSUMOTO YOSHIHIRO
NAGATA YUJI
