臺灣博碩士論文加值系統

由於目前燃料電池中重要元件之雙極板，並無適合進行量產之加工方式，故其整體成本始終居高不下。本研究利用橡膠墊輔助成形之方法，進行金屬板微流道結構之製作，並探討各製程參數對於成形性之影響，以利量產可能性之探討。本研究之實驗使用厚度為0.1mm之SUS316L薄板，透過聚氨酯墊，進行金屬雙極板微流道之壓印成形。本研究先利用有限元素模擬軟體ANSYS CFX進行流道幾何外型對於燃料電池效能之模擬分析，探討流道深度、寬度與肋條寬度等參數對於速度與壓力之影響。接續則利用有限元素模擬軟體Abaqus/ Standard，建立2-D平面與3-D模型，對其進行以填充率為目標函數之最佳化分析，觀察在成形容許範圍內，流道幾何參數與負載之變化趨勢，於2-D結果顯示，在小幅度改變下，負載提升、加大內外圓弧角以及減少脫模角，皆有利於提升成形性，且對於不同之成形性判斷依據，其影響顯著之程度先後順序則略有不同。而在3-D模擬中，可知流道轉彎處板材與全板材之厚度變化，並以實驗破裂厚度來判斷成形極限，並將實驗結果與數值模擬比對，以達到數值模擬分析之可信性。最後本文亦在橡膠墊輔助成形條件下，設計出最佳效能之流道。

Bipolar plate is an important component of the fuel cell. Because there is no suitable fabrication process for mass-production of bipolar plate, the cost of portable fuel cell is still too high now a days. In this study, the rubber pad forming process was used to fabricate the micro-channels on metallic bipolar plate and the effect on process parameters of the rubber pad forming were analyzed. Polyurethane rubbers were used for the rubber pads, and SUS316L stainless steel sheets with a thickness of 0.1mm were tested in the experiment. Firstly, finite element analysis (FE, Ansys CFX software) was used to analyze the efficiency of fuel cell by geometric factor of channels numerically, in order to figure out the influence of velocity and pressure on channel depth, channel width, rib width. Secondly, finite element analysis (FE, Abaqus / Standard software) was also used to analyze the rubber pad forming process numerically. Finally, the experimental and numerical results showed a good agreement in this study. Furthermore, an optimization design of micro-channels for fuel cell was developed under rubber pad forming process.

摘要 I
ABSTRACT II
誌謝 II
目錄 IV
表目錄 VIII
圖目錄 IX
第一章 緒論 1
1.1 前言 1
1.1.1 燃料電池簡介 2
1.1.2 橡膠墊輔助成形技術 6
1.2 研究動機與目的 9
1.3 文獻回顧 10
1.4 論文構成 14
第二章 材料性質與試驗 15
2.1 不鏽鋼板材拉伸試驗 15
2.1.1 拉伸試驗設備 15
2.1.2 拉伸試片製作 15
2.1.3 拉伸試驗步驟 16
2.1.4 拉伸實驗之結果 16
2.2 橡膠材料試驗 20
2.2.1 超彈性材料力學模型 20
2.3 結言 22
第三章 有限元素分析 23
3.1 有限元素法簡介 23
3.2 有限元素分析系統 25
3.3 軟體介紹 28
3.3.1 ANSYS（CFX） 28
3.3.2 Abaqus 30
3.4 基本假設 31
3.5 ANSYS CFX流道幾何模型建立 32
3.5.1 邊界條件 36
3.5.2 流道設計 36
3.5.3 統御方程式 37
3.6 模擬結果比較 38
3.7 Abaqus成形模型建立 46
3.7.1 模具、板件外形與邊界條件設定 46
3.7.2材料性質設定 49
3.8 後處理 50
3.9 結言 50
第四章 數值分析與實驗方法 51
4.1 實驗機台與模具介紹 51
4.1.1 油壓壓床機台 51
4.1.2 上模仁與橡膠墊 55
4.1.3 量測儀器 57
4.2 實驗與初步2-D有限元素模擬之驗證 59
4.2.1 最佳化分析 61
4.3 實驗與3-D有限元素模擬驗證 67
4.3.1 部份3-D流道模擬 67
4.3.2 3-D全流道模擬與實驗 69
4.3.3 流道深度實驗量測與模擬 73
4.4 實驗與模擬負荷沖程 77
4.5 實驗與模擬厚度變化 78
4.6 簡易燃料電池組裝與測試 82
4.7 結言 86
第五章 結論與未來工作 87
5.1 結論 87
5.2 未來研究方向之建議 89
參考文獻 91
附錄A 模具系統之設計工程圖 95
-作者簡介 97

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