Simulation and Experiment of cathode channel on the performance of PZT-PEMFC
Date Issued
2009
Date
2009
Author(s)
Kuo, Yao-Zong
Abstract
Previous studies have indicated that a proton exchange membrane fuel cell with a piezoelectric (PZT) device, which can offer better performance and current generation. Piezoelectric proton exchange membrane fuel cell (PZT-PEMFC) may compress more air into catalyst layer and thus may enhance electrochemical reactions, resulting in higher current output. At the same time, produced water vapor can pump out the cathode channel during the compression process. In this study, a transient three-dimensional model is built to simulate. We discuss the performance of PZT-PEMFC with cathode open air ratio and cathode in/outlet with nozzle/diffuser. Cathode open area ratio from 80.5% to 47.9% may increase the current density 17% of PZT-PEMFC. The reason is that the ribs can reduce electron resistance and increase chemical reaction. The cell with open air ratio reduced to 34.7%, resulting higher in-plane electrical resistance and lower ionic conductivity of the membrane. The performance of cathode in/outlet with nozzle/diffuser (Type A) is better. In the same differential change of volume, Type A can suck in more oxygen and pump out water vapor.
Subjects
PZT-PEMFC
Piezoelectric device
Frequency
Current density
Open area ratio
Ribs
Type
thesis
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