燃料電池系統長期運轉組件失效分析與優化策略評估

由於燃料電池系統擁有高發電效率與低污染排放等特點，具有成為分散式發電系統之潛力，然而燃料電池系統需要克服壽命太短且發電成本太高等問題。因此，本研究透過使用FMEA手法與系統熱質能分析方法，探討燃料電池系統於長期運轉下，影響系統性能之關鍵因子，並且以系統數值模擬結果進行分析驗證。以空氣供應模組為例，FMEA分析結果指出其風險優先數最高，為影響系統之重要關鍵因子，並且會間接影響熱箱模組之性能與壽命。本研究建立高溫燃料電池系統之數值模型，分析空氣模組失效對系統之影響，模擬結果當陰極空氣流量變化率達20%時，影響系統發電功率變化達7%，且電堆與燃燒器溫度變化量達20℃，驗證空氣供應模組對於系統各組件性能之影響相當顯著，為系統長期運轉過程中，需要管控失效的高風險關鍵模組。系統模擬結果證明，本研究所使用之FMEA分析手法，可以用於系統長期運轉之組件失效分析與優化策略之評估。

關鍵字

燃料電池；失效模式與影響分析；熱質能分析；發電功率

並列摘要

The fuel cell is a power generation system which has the characteristics of high electrical efficiency and low pollution emissions. Operating lifetime and cost are two main problems which should be facing for commercialize in the future. In order to evaluate the key factor of influence the performance and lifetime to fuel cell system, failure mode and effects analysis (FMEA) and thermodynamic analysis would be used and investigate in this research paper. Based upon on the simulation result, the component of air supply is the key factor which would influence the system's performance and the lifetime of a hot box. Therefore, the simulation model of high temperature fuel cell system would be built to verify in this research. According to the result, when the flow rate of air has been changed in 20%, the rate of performance change of power generation the system is 7%, also the temperature of the stack and burner would be influenced and changed to 20℃. By the above result, the air supply module is an important and high risk module for fuel cell system during the long-term operation. Also the analysis method of FMEA has been confirmed that can be used to investigate the failure analysis and optimization strategy in fuel cell system for long-term operation.

並列關鍵字

Fuel Cell ； Failure Mode and Effects Analysis ； Thermodynamic analysis ； Power generation

國際替代計量

燃料電池系統長期運轉組件失效分析與優化策略評估

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