台灣蘊涵豐富的地熱，科技的進步改善了低溫地熱的效率，因此地熱漸漸被大眾所重視。建造一座地熱電廠時，其安全、成本、性能、品質和可靠性是相當重要的，所以必需在問題發生前，採取相應的行動措施，避免它的發生。在本研究中，使用失效模式與效能分析（Failure Mode and Effect Analysis, FMEA）及層級分析法（Analytic Hierarchy Process, AHP）來解決此問題。
首先，建立雙循環地熱發電廠的四大子系統之FMEA表，包括蒸發器、冷凝器、渦輪機和輔助設備及發電機和電氣系統，利用FMEA對四大子系統進行風險分析與失效模式評估，且定義了潛在失效和風險優先級數（risk priority number, RPN）。再用層級分析法在風險優先級數中建立層級結構，並對四大子系統進行AHP分析，重新分別給予四大子系統主觀權重，再以線性調整重新計算，可得到新的RPN值，其優先順序與傳統FMEA分析有所不同，可經由四大子系統下嚴重性（severity, S）、發生率（probability of occurrence, O）和檢測度（probability of detection, D）應有不同的相對權重，獲得更客觀之失效問題之處理優先順序。AHP可以不斷地將專家意見彙整與系統技術革新而改變，由工程師或決策者在風險優先級數S、O和D中給予相對應的主觀權重。因此，本研究可以依照不同的因素更準確地獲得四大子系統的高風險故障模式。

The efficiency of geothermal power plant has been improved with better advancing technology which is an important issue in the development of geothermal energy in Taiwan. In addition, to build a geothermal power plant with safety, high performance, quality and reliability is important. However, the failure definition and classification is proposed in this study. Therefore, we need to take action to prevent it resulted from the accident. In this study, the Failure Mode and Effect Analysis (FMEA) and Analytic Hierarchy Process (AHP) of the subsystem of a binary power generation system are built. The failure definition and the indicator of the failure are defined in this study. The risk priority number (RPN) is obtained from the index of severity (S), occurrence (O), and detection (D) resulted from the various failure mode. Based on weighted FMEA table, AHP is used to evaluate criteria for priority and decision. Therefore, we could clearly obtain high-risk failure mode of component for the turbine system.

摘要 I
ABSTRACT II
誌謝 III
目次 IV
表次 VI
圖次 VII
符號索引 VIII
一、緒論 1
1-1前言 1
1-2研究動機與目的 3
1-3論文架構 5
二、文獻回顧 6
2-1地熱發電廠 6
2-2 FMEA與AHP之應用 9
三、理論基礎介紹 13
3-1失效模式與效能分析 13
3-2層級分析法 18
四、雙循環系統之FMEA分析法 20
4-1雙循環系統之建構圖 20
4-2雙循環四大子系統之方塊圖 23
4-3 FMEA分析表建立 25
五、雙循環四大子系統之AHP分析法 30
5-1蒸發器之AHP分析 30
5-2冷凝器之AHP分析 34
5-3渦輪機和輔助設備之AHP分析 37
5-4發電機和電氣系統之AHP分析 40
六、結論 43
七、參考文獻 44

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