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研究生:李世軍
研究生(外文):Shih-Chun Li
論文名稱:螺栓鎖緊順序對微型質子交換膜燃料電池流道板變形之影響
論文名稱(外文):Effect of Bolts Locking Sequence on the Deformation of Flow-Channel Plates in Micro-PEMFC
指導教授:錢志回
指導教授(外文):Chih-Hui Chien
學位類別:碩士
校院名稱:國立中山大學
系所名稱:機械與機電工程學系研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2008
畢業學年度:96
語文別:中文
論文頁數:156
中文關鍵詞:質子交換膜燃料電池氣體擴散層螺栓鎖緊順序流道板
外文關鍵詞:Flow-channel platesPEM fuel cellGas diffusion layersBolts locking sequence
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一個質子交換膜燃料電池,其組裝的設計和方法,對電池的性能優劣,有著非常重要的地位。燃料電池在組裝時,容易造成各組件之間的相互變形,包括雙極板(Bipolar Plates)、流道板(Flow-Channel Plates)、氣體擴散層(Gas Diffusion Layers)和質子交換膜(Membrane Eletrode Assembly,MEA)。在以往的研究中提到,以螺栓鎖緊燃料電池,會對內部流道板產生位移變形,此現象容易使燃料電池的氣體外漏,或是造成內部的接觸阻力變大,甚至使得整個電池使去功能。
在本文中,將針對不同的螺栓鎖緊順序,對微型質子交換膜燃料電池內部的流道板,其所產生的位移變形做一個研究探討。我們將採用商用套裝軟體ANSYS,來建構3-D的單一微型質子交換膜燃料電池模型,並對不同螺栓鎖緊順序,所造成內部流道板位移變化,做數值模擬分析,最後再討論出一個合適的鎖緊順序,以減少流道板的變形。
The design and method of cell assembly plays an important role in the performance of PEM fuel cell. The cell assembly will affect the contact behavior between the bipolar plates, flow-channel plates, gas diffusion layers (GDLs) and membrane electrode assembly (MEA). From the past studies, it was noted that the flow-channel plates in the cell will be deformed while the cell was assembled by locking with bolts. This phenomenon may lead to leakage of fuels, high contact resistance and malfunctioning of the cells.
The main aim of this research is to study the variation of the deformation mode of the flow-channel plat in a micro-PEM fuel cell assembly subjected to different bolts locking sequences. The commercial FEM package, ANSYS, was adopted to model the three-dimensional single micro-PEMFC FEM model and the numerical simulation analyses were performed. The effect of the bolts locking sequence on the deformations of flow-channel plate in the micro-PEMFC was presented. A most properly bolts locking sequence was proposed also.
目錄..........................................................................................I
表目錄....................................................................................IV
圖目錄...................................................................................VII
摘要......................................................................................XIII
Abstract...............................................................................XIV
第一章 緒論 ...........................................................................1
1.1燃料電池的發展...............................................................1
1.2燃料電池基本原理...........................................................2
1.3質子交換膜燃料電池.......................................................4
1.4研究目標...........................................................................6
1.5文獻回顧...........................................................................7
1.5.1燃料電池分析................................................................7
1.5.2燃料電池組裝壓力模擬................................................8
1.5.3燃料電池組裝壓力對效率之影響.............................10
1.5.4燃料電池均勻組裝壓力之設計.................................12
1.6 論文架構.......................................................................13
第二章 數值模擬.................................................................17
2.1有限元素法.....................................................................17
2.2燃料電池模型.................................................................18
2.2.1模型尺寸、材料性質和名稱定義.............................18
2.2.2左右側流道板形狀設計上的差異.............................20
2.3邊界條件和假設條件.....................................................20
2.3.1拘束條件.....................................................................20
2.3.2Contact Element與Glue..........................................24
2.3.3螺栓鎖緊壓力.............................................................26
2.3.4分割元素收斂性.........................................................28
2.3.5假設條件.....................................................................30
2.4負載施加方式.................................................................30
第三章 兩側流道板的比較.................................................49
3.1分析方法........................................................................49
3.1.1位移的取樣和定義.....................................................49
3.1.2應力的取樣和定義.....................................................50
3.2位移變形分析.................................................................52
3.2.1位移分析圖.................................................................52
3.2.2分析討論.....................................................................54
3.2.3左側流道板和右側流道板之翹曲度比較.................56
3.3應力分佈分析................................................................59
第四章 螺栓鎖緊順序分析.................................................91
4.1對角線鎖法....................................................................92
4.2順時鐘鎖法....................................................................95
4.3逆時鐘鎖法....................................................................96
4.4橫向順序鎖法................................................................98
4.5直向順序鎖法..............................................................100
4.6不同鎖緊順序對左右側流道板比較..........................101
4.7流道板應力分析..........................................................102
4.8小結..............................................................................103
第五章 結論與未來展望...................................................132
5.1結論..............................................................................132
5.2未來展望......................................................................133
參考文獻............................................................................135
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