| Summary: | 碩士 === 元智大學 === 機械工程學系 === 101 === The non-uniform distributions of internal temperature, voltage, pressure, flow and current in a high-temperature proton exchange membrane fuel cell (HT-PEMFC) stack degrade membrane electrode assembly (MEA), non-uniform distributions of reactant fuel, and its performance as well as lifetime.
In this work, micro-electro-mechanical systems (MEMS) are utilized to develop a heatproof integrated micro sensor for in situ monitoring the temperature, voltage, pressure, flow and current variations in a high-temperature PEMFC stack. An attempt is also made to identify a better material and process parameters for a high temperature electro-chemical environment.
Six heatproof integrated micro sensors are embedded in the cathode flow plate of the HT-PEMFC stack (10 cells). Experimental results indicate that the non-uniform distributions of temperature and flow cause both large temperature differences and heat accumulation, as well as the non-uniform distributions of voltage and current. Additionally, the internal pressure remains stable in the high-temperature fuel cell stack. Moreover, the upstream pressure is unstable at the anode and cathode inlet.
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