Experimental investigation of gravity effect on water management in PEM fuel cell

Experimental purpose was to investigate gravity effect on water management of the PEM(Proton Exchange Membrane) fuel cell. Some experiments were designed to observe the gravity effect on water management. On changing anode and cathode relative placing position in the PEM fuel cell, water transport direction and gravity direction was same at anode-upward, and cathode-upward was opposition. At anode-upward and cathode-upward, some experiments were taken by changing voltage and current. The results show that the current density of cathode-upward is a little better than the one of anode-upward when the temperature is lower. Under the condition of small current density, the voltage of cathode-upward is much better than the one of anode-upward when temperature is higher. But under the big current density, the voltage of cathode-upward is much bad compare with anode-upward. The electrode flooding makes the results at gravity effect.