METHOD AND ARRANGEMENT FOR CONTROLLING FUEL CELL SYSTEM EFFICIENCY

摘要

The object of the invention is an arrangement for controlling high temperature fuel cell system efficiency for producing electricity with fuel cells, each fuel cell in the fuel cell system comprising an anode side 100, a cathode side 102, an electrolyte 104 between the anode side and the cathode side, and the fuel cell system comprising a fuel delivery channel 130 for feeding fuel flow to the anode sides. The arrangement for controlling high temperature fuel cell system efficiency comprises means 120 for grouping fuel cells into groups, each said group comprising at least one fuel cell, and means 124 for monitoring the performance of said groups and noticing if one or more of said groups performs below a determined performance level. The arrangement also comprises means 124 for derating the power level of the fuel cell system by switching off one or more of said groups performing below said performance level and by preventing the fuel flow to the anode sides of said one or more switched off groups.