Swan, David H., Blake E. Dickinson, Murali P. Arikara, Manohar K. Prabhu (1994) Cathode Air Control of a PEM Fuel Cell Stack Operating on the USABC Dynamic Stress Test. Institute of Transportation Studies, University of California, Davis, Presentation Series UCD-ITS-RP-94-33
This paper presents experimental data on the performance of a proton exchange membrane (PEM) fuel cell system operating on the USABC Dynamic Stress Test (DST) as a function of cathode air flow rate and inlet pressure. The fuel cell system used was a Ballard Power Systems' 35 cell stack. The experiments were performed by operating the fuel cell stack on the DST with a pulse-width-modulated controller and simulating the operation of a variable output compressor with a mass flow controller and electronic back pressure regulator. Dynamic conditions reduce the fuel cell average efficiency. Air compressor control was found to be critical to maximize net efficiency.