碩士 / 元智大學 / 機械工程學系 / 97 / In the history of fuel cell development, its performance is always influenced by the water behavior in flow channel blocks. The position of water behavior and moisture directly affects the efficiency of the fuel cell. If the flow channel block of cathode collects much of the water behavior, that fuel can not diffuse easily. Moreover, in case of high fuel flow rate or excess heat in high ampere, the membrane electrode assembly becomes dry and deteriorates the performance of fuel cell. The objective of this experiment is to observe and study the relationship between water behavior of cathode and the performance of the fuel cell in transparent PEMFC when the fuel cell consumes variational humidification and concentration of cathode gas. And we also hope to provide a method to study and solve the problems in water and heat management.
The method we adopt in this experiment is to firstly fix the component of the fuel cell, and to fabricate them with Ion Power''s membrane electrode assembly、gold-coated stainless steel and two-channel serpentine current collect plate、Plexiglas end plant. From then on, The status of this step is then confirmed and stabilized by constructing、testing、activation process.
Experiments are to supply a fixed current, fixed cathode and anode gas flow was observed in different tone and gas concentration and humidity of the current operation in a long time under the effect arising from stagnant water, then to analyze with the influence of a battery-generated power and the changes in voltage. Besides, with CCD camera to observe and record temperature and humidity are in different circumstances within the cathode water flow conditions, and to observe that what the effect on cathode gas concentration and humidity in different current equivalent operation in a long time under arising from stagnant water is. Then, to explore what the influence of PEMFC performance stability with the cathode water flow is.
| Identifer | oai:union.ndltd.org:TW/097YZU05489032 |
| Date | January 2009 |
| Creators | Ting-Jung Chang, 張庭榮 |
| Contributors | 翁芳柏 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 98 |
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