J0601-2-4 パッシブ形PEFCの空気極近傍の流れの可視化(燃料電池システムおよび熱・物質移動)

概要

論文の詳細を見る
Air flow fields in the vicinity of the cathode of a passive-type PEFC (polymer electrolyte fuel cell) were visualized with PIV (particle image velocimetry) in order to clarify the influence of air flow on the fuel cell performance. The experiments were conducted at a constant current density of 200 mA/cm^2 with a single cell in three different postures, i.e., a vertically upright position (θ=90°) and two horizontally laid-down positions (θ=0° with cathode on the top and θ=180° with cathode on the bottom). The results showed that the output voltage was lower and more unstable in the case of θ=180° compared with the one in the cases of θ=90° and 180°, where natural convection promoted discharge of water vapor and absorption of hydrogen. Tracer particles used in the flow visualization were shown not to have affected the fuel cell performance.
2009-09-12