CONTROL SYSTEM FOR A SEALED COOLANT FLOW FIELD FUEL CELL POWER PLANT HAVING A WATER RESERVOIR

摘要

The system (10) controls at least one of a pressure of the reactant streams (16A 16B) within at least one of an anode flow field (28) and a cathode flow field (36) a flow rate of the reactant streams (16A 16B) flowing through the anode and/or cathode flow fields (26 28) a temperature of a coolant fluid passing through a sealed coolant flow field (44) and a flow rate of the coolant fluid; so that water (14) moves from a water reservoir (18A 18B) into the reactant stream (16A 16B) whenever power generated by the fuel cell (20) is between about 80% and about 100% of a maximum fuel cell power output and so that water (14) moves from the reactant stream (16A 16B) into the water reservoir (18A 18B) whenever fuel cell power is less than about 75% of the maximum power output.