Patent ID: 8507144
Filing Date: 2013-08-13
Classification: H01M,Y02E

Abstract:
1. A high temperature fuel cell system for producing electricity with plural fuel cells, each fuel cell having an anode side, a cathode side, and an electrolyte between the anode side and the cathode side, the high temperature fuel cell system comprising: fuel feeding means for feeding fuel to the fuel cells and for providing information on the fuel; means for generating information about fuel utilization in the fuel cells and oxygen to carbon ratio (O/C ratio) in the fuel cell system process; active means for controlling loading of the fuel cells; a first closed loop controller for controlling said fuel feeding means by taking into account the fuel utilization information as process feedback information, and by implementing a constraint function taking control of O/C ratio by restricting output of the first controller when said O/C ratio deviates from an allowed range by falling below a minimum target value in the allowed range; and a second controller for controlling the active fuel cell loading means by implementing a constraint function taking control of fuel utilization by restricting output of the second controller when said fuel utilization deviates from an allowed range by exceeding a target value in the allowed range.