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'an improved fuel cell stack system operably connected to an internal gas preheating device to improve performance of proton exchange membrane fuel cells and high temperature polymer electrolyte membrane fuel cells'
'an improved fuel cell stack system operably connected to an internal gas preheating device to improve performance of proton exchange membrane fuel cells and high temperature polymer electrolyte membrane fuel cells'
The invention relates to an improved fuel cell stack system assembly operably connected to an internal gas preheating device to improve performance of proton exchange membrane fuel cells and high temperature polymer electrolyte membrane fuel cells, the improvement is characterized by comprising an anode side reactant preheating plate placed between the insulation plate and the anode side copper plate; and a cathode side reactant preheating plate interposed between the cathode copper plate and the insulation plate, the preheating plates, are connected to an electrical heating source and circulating hot fluid, the plate being initially heated to a pre-determined temperature using an electrical heater provided with a temperature controller, an inlet of the preheating plate is disposed directly in fluid communication with the regular stack inlet receiving reactants, the received reactants are heated prior to enter into electrochemical active zone inlet manifold line of anode or cathode side; and in that the system is configured to be in direct communication with the cathode exhaust gases through an external assembly interposed between cathode exit and the preheating device for preheating the reactants once the stack attains its startup temperature.
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