本論文係包含兩部分，第一部分係建立三維單通道高溫型質子交換膜燃料電池數值模型，並於陰陽極流道側邊加裝肋條，透過加裝不同肋條數量1,3,5,7個來探討電池的性能，並得到電池在陰陽極流道側邊加裝5個肋條時會有最佳淨功率。結果顯示在加裝5個肋條情況下，電池輸出淨功率比無加裝肋條高約6.6 %。第二部分則透過實驗田口方法L27對已加裝肋條蛇型流道板實驗，探討在不同燃料進口相對濕度下對低溫型質子交換膜燃料電池的性能影響。L27則使用五種操作參數分別為A因子：電池操作溫度,B因子：陽極入口相對濕度,C因子：陰極入口相對濕度,D因子：陽極化學計量比,E因子：陰極化學計量比，以L27直交表組合進行實驗。由實驗結果可知在操作條件為電壓0.4 V時，操作參數為A2B3C2D2E1時可得到最佳的電池性能，發現A因子對電池性能的影響最大，其次是C,B,E因子；影響最小的因子為D因子。電池溫度增加時可以使電池性能增加，但超過一定溫度後反而使電池性能往下掉，而相對濕度的增加也可使電池性能增加，但過濕時也會導致電池性能的下降。在操作電流15 A及25 A下，除了電池溫度對歐姆阻抗影響較大外，其他控制因子則對歐姆阻抗影響不大。總阻抗隨電池相對濕度及電池溫度增加而降低，但電池溫度過高時容易使膜內水分蒸發而含水減少，導致濕度過低而離子傳輸困難，產生質傳阻抗而使總阻抗值增加。

This thesis is composed of two parts. The first part is to establish a high temperature proton exchange membrane fuel cell model and to install the rectangular ribs at both sides of anode and cathode channel. The performance of HTPEM (high temperature-proton exchange membrane) fuel cell is investigated by installing different rib numbers of 1,3,5,7 in single straight flow channels. The results show that the maximum output net power occurs at five-rib case, and it is higher than that with no rib about 6.6 %. The second part is to employ Taguchi method and L27 orthogonal array investigating the effect of inlet relative humidity on the performance of LTPEM (low temperature-proton exchange membrane) fuel cell serpentine passages with ribs. The L27 orthogonal array is conducted by selecting five control factors separately including fuel cell temperature (factor A), anode relative humidity (factor B), cathode relative humidity (factor C), stoichiometric flow ratio of hydrogen (factor D) and stoichiometric flow ratio of oxygen (factor E). At operating condition of 0.4 V, the optimal operating combination for LTPEM fuel cell is A2B3C2D2E1. The maximum effect is caused by factor A, followed by C, B, E, and the minimal impact is caused by factor D. When the fuel cell temperature increases, the fuel cell performance is improved. However, as the temperature exceeds a critical temperature, the fuel cell performance starts falling down.
When the LTPEM fuel cell operates at 15 A and 25 A, it is observed that the fuel cell temperature provides the maximum effect on ohmic resistance. The total impedance varies with fuel cell temperature and relative humidity. When the fuel cell temperature and the relative humidity increase, the total impedance decreases. However, the fuel cell temperature is so high as to reduce water content due to evaporation, leading to suppressed ion transport. As a result, the mass transfer impedance increases to raise the total impedance.

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