Effects of a Microporous Layer and the Gas Flow Configuration on Through-Plane Water Transport in a Polymer Electrolyte Membrane Fuel Cell
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We investigated the effects of the microporous layer (MPL) and the gas flow configuration on water transport in an operating polymer electrolyte membrane fuel cell by means of tunable diode-laser absorption spectroscopy (TDLAS). TDLAS, which permits optical remote sensing of the distribution of the water vapor concentration along a channel, was used to examine local through-plane water transport across the membrane electrode assembly (MEA). TDLAS observations showed that an MPL at the cathode side enhances back-transport of water generated at the cathode to the anode under conditions of low relative humidity in both co-flow and counter-flow configurations, because it acts as a mass-transport resistance in the MEA. We also showed that the counter-flow configuration established an internal circulation of water in the fuel cell.
- 一般社団法人日本機械学会・社団法人日本伝熱学会の論文
一般社団法人日本機械学会・社団法人日本伝熱学会 | 論文
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