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URN etd-0625102-154628
Author Szu-kai Hsiung
Author's Email Address m8832606@student.nsysu.edu.tw
Statistics This thesis had been viewed 5360 times. Download 3974 times.
Department Mechanical and Electro-Mechanical Engineering
Year 2001
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title The research of using different experiments to develope the effect of PEMFC performance in changing different design conditions and
manufacture method
Date of Defense 2001-06-29
Page Count 101
Keyword
  • PEMFC
  • MEA
  • Flow area ratio
  • Abstract Abstract
    The experimental tests and analysis of single fuel cell unit are performance in this research, and the electrolyte in MEA(membrane  and electrode assembly) we used Nafion 112.Accroding to change several design factors and operation conditions, we can find out how important the factors affect the PEMFC power output. The experimental conditions in this study are various of type of fasten torque, flow channels, oxidizers, catalyst type and loading in cathode side, materials of electron collector, inlet gas pressure and humidification of membrane. The results can provide us references to assemble a fuel cell stack in future.
    PEMFC can start quickly at low temperature and achieves stable output voltage. When the 4 N-m torque is applied to fasten the reaction chamber, the contact resistance between the electrode and electron collector reaches a minimum value. The results show that when the area ratio(Af /At)is 58.41%, we can have better ratio between channel areas and contact area, and the output can be larger. We found that increasing the loading of catalyst in the cathode, the power output rises up clearly, but the loading also has a limitation. 
    By using gold to be the electron collector, the result shows that it has better performance than using graphite, but the price is also much higher. Our experiments display that use oxygen to be oxidizer can have better performance than use air. When we heated membrane in the water at 80℃, it can resupply the water in the membrane, remain enough humidification of membrane can be clearly helpful to the PEMFC power output, because humidification can keep the proton conductivity of the membrane in good condition. And we also found while the hot press pressure at 160atm, the performance can be better than using other pressure.
    Key words : PEMFC、MEA、Flow area ratio
    Advisory Committee
  • Chin-Chia Su - chair
  • Ming-San Lee - co-chair
  • Shin-Min Chiang - co-chair
  • Long-Jeng Chen - advisor
  • Files
  • etd-0625102-154628.pdf
  • indicate access worldwide
    Date of Submission 2002-06-25

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