| Summary: | 碩士 === 國立成功大學 === 航空太空工程學系碩博士班 === 96 === Recently, there is a tendency toward larger reactive area and higher current in PEMFC stack design. The design of assembly of a PEMFC stack becomes much more complex and important than just a single cell. The assembly mechanism will affect the contact behavior between bipolar plates and membrane electrode assemblies （MEAs）and hence the performance of PEMFC stack. Inadequate clamping pressure may lead to leakage of fuels, high electric impedance and malfunction of the cells. On the other hand, excessive clamping pressure may destroy the MEA. This study is to study the PEMFC stack design and its clamping pressure distribution, using the pressure sensitive film (FUJI-FILM I&I) to measure the clamping pressure between the reactive area and the bipolar plates under different bolt-clamping configurations and different clamping forces. According to the experimental results, the stack performance and the pressure’s distribution is greatly influenced by the clamping force and the bolt configuration. The experimental results further our understanding of the effects of clamping conditions on the performance of a PEMFC.
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