Patent ID: 8197982

Claim:
A fuel cell stack having a plurality of fuel cell cassettes, each fuel cell cassette having a fuel cell with an anode and a cathode, said fuel cell stack comprising: an anode supply chimney for supplying fuel to said anode of each said fuel cell cassette; an anode exhaust chimney for removing anode exhaust from said anode of each said fuel cell cassette; a cathode supply chimney for supplying oxidant to said cathode of each said fuel cell cassette; a cathode exhaust chimney for removing cathode exhaust from said cathode of each said fuel cell cassette; wherein a first fuel cell cassette includes a flow control member disposed between said anode supply chimney and said anode exhaust chimney or between said cathode supply chimney and said cathode exhaust chimney such that said flow control member provides a flow restriction different from at least one other of said fuel cell cassettes and such that said flow control member does not restrict said anode supply chimney, said anode exhaust chimney, said cathode supply chimney, said and said cathode exhaust chimney.