Het testen van een 1 kW De Nora vaste polymeer elekrolyt brandstofcel voor toepassing op oppervlakteschepen. Deel 2. Eindrapport fase 1 (Testing of a 1kW De Nora Solid Polymer Electrolyte Fuel Cell for Application on Board of Naval Surface Ships. Part 2. Final Report, Phase I).

Abstract : The development of fuel cells for traction accelerated the last years because of more strick emission demands for road vehicles. The solid polymer electrolyte fuel cell (PEFC) has good chances for this application also for application on board of ships. A 1 kW PEFC stack was purchased from the Italian firm De Nora to obtain practical experience with this type of stack. Via a dedicated computer controlled fuel cell test system the fuel cell can be loaded according to any desired load pattern. 196 tests were executed with the stack (a total of approximately 73 kWh was delivered by the stack). Decrease of the hydrogen stoichiometry from 1.5 down to 1.05 and increase of the air stoichiometry from 1.5 up to 2.0 is of no influence to the performance of the stack. An decrease of the air stoichiometry to 1.3 gives no problems but has energetically no advantages. The stack temperature has the most influence on the performance of the stack (100 A continuously is possible at temperatures above 40 deg C). The dead end configuration works very well. The deviations in cell voltages increase with the current and are, in case they are not too high, of no concern. After 1 year and 3 months of testing the cell voltages have decreased in value between the 1 and 14%. This implicates that the performance (power) of the stack has decreased with approximately 4.4% (with increases of cell voltages and without taken cell 14 into account). The electric (voltage) efficiency lies on average between 36 % (150 A) and 83% (0 A). The tested fuel cell meets the given vibration and shock requirements and shows no sign of damage at pressure differences up to 10 bars between the hydrogen and air compartment.