| Summary: | 碩士 === 國立臺灣大學 === 機械工程學研究所 === 105 === This study develops an air-breathing pump driven by a piezoelectric actuator to provide air for a Proton Exchange Membrane Fuel Cell (PEMFC) stack. Permanent magnets are combined with a piezoelectric actuator to drive three air breathing pumps using the magnetic force. This design enables the pump to simultaneously provide a sufficient amount of air to all the cathode flow field plate of a “bi-cell PZTmag–PEMFC stack”. When both the PZTmag and the PDMSmag used a magnet with a 6 mm diameter and 1 mm thickness, the maximum amplitude of 87 μm was produced under operating conditions of 70 Hz and 40 V, and the power consumption was 0.03 W. The resulting maximum net power density of the bi-cell PZTmag–PEMFC stack was 0.1925 W cm-2. Compared with the performance reported in previous research [1] on three bi-cell PZT-PEMFC, the net power density increased by 20%, and its volume and weight were reduced by 68% and 76%, respectively. Furthermore, this design has less voltage loss in ohmic polarization region compared with the traditional bipolar plate PEMFC stack when the cells are in series [2].
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