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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 陳發林(Falin Chen) | |
| dc.contributor.author | Mu-Kun Lin | en |
| dc.contributor.author | 林睦崑 | zh_TW |
| dc.date.accessioned | 2021-06-13T05:46:46Z | - |
| dc.date.available | 2006-07-25 | |
| dc.date.copyright | 2006-07-25 | |
| dc.date.issued | 2006 | |
| dc.date.submitted | 2006-07-11 | |
| dc.identifier.citation | 參考文獻
[1] www.fuelcellstoday.com [2]J. L. Cohen, D. A. Westly, A. Pechenik, H. D. Abruna, “Fabrication and Preliminary Testing of a Planar Membraneless Microchannel Fuel Cell,” J. Power Sources 139 2005, pp. 96-105. [3]J.S. Wainright, R.F. Savinell, C.C. Liu, M. Litt, “Microfabricted Fuel Cells,” Electrochim. Acta 48 2003, pp. 2869-2877. [4]S. C. Kelley, G. A. Deluga, W. H. Smyrl, “A Miniature Methanol/Air Polymer Electrolyte Fuel Cell,” Electrochem. Solid-State Lett. 3 (9) 2000, pp.407-409. [5]J. Larminie, A. Dicks, “Fuel Cell Systems Explained,” 2nd ed. John Wiley, Chichester, 2003. [6]A.E. Kamholz, B.H. Weigl, B.A. Finlayson, P. Yager, “Quantitative Analysis of Molecular Interaction in a Microfluidic Channel: The T-Sensor,” Anal. Chem. 71 1999, pp.5340-5347. [7]R.F. Ismagilov, A.D. Stroock, P.J.A. Kenis, G.M. Whitesides, “Experimental and Theoretical Scaling Laws for Transverse Diffusive Broadening in Two-Phase Laminar Flows in Microchannels,” Appl. Phys. Lett. 76 2000, pp.2376-2378. [8]R. Ferrigno, A. D. Stroock, T. D. Clark, M. Mayer, G.M.Whitesides, “Membraneless Vanadium Redox Fuel Cell Using Laminar Flow,” J. Am. Chem. Soc. 124 2002, pp.12930-12931. [9]E.R. Choban, L. J. Markoski, A. Wieckowski , P.J.A. Kenis, “Microfluidic Fuel Cell Based on Laminar Flow,” J. Power Sources 128 2004, pp.54-60. [10]A. Bazylak, D. Sinton, N. Djilal, “Improved Fuel Utilization in Microfluidic Fuel,” J. Power Sources 143 2005, pp.57-66. [11]S. Hasegawa, K. Shimotani, K. Kishi, H. Watanabe, “Electricity Generation from Decomposition of Hydrogen Peroxide,” Electrochem. Solid-State Lett. 8 (2) 2005, pp.A119-A121. [12]J. L. Cohen, D. J. Volpe, D. A. Westly, A. Pechenik, H.D. Abruna, “A Dual Electrolyte H2/O2 Planar Membraneless Microchannel Fuel Cell System with Open Circuit Potentials in Excess of 1.4V,” Langmuir 21 2005, pp.3544-3550. [13]E.R. Choban, P. Waszczuk, P.J.A. Kenis, “Characterization of Limiting Factors in Laminar Flow-Based Membraneless Cell,” Electrochem. Solid-State Lett. 8 (7) 2005, pp.A348-A352. [14]E.R. Choban, J.S. Spendelw, L.Gancs, A. Wieckowski, P.J.A. Kenis, “Membraneless Laminar Flow-Based Micro Cells Operating in Alkaline, Acidic, and Acidi/Alkaline Media,” Electrochim. Acta 50 2005, pp.5390-5398. [15]S.K. Yoon, M. Mitchell, E.R. Choban, P.J.A. Kenis, “Gravity-Induced Reorientation of the Interface between Two Liquids of Different Densities Flowing Laminarly through a Microchannel,” Lab Chip 5 2005, pp.1259-1263. [16]R.S. Jayashree, L. Gancs, E.R. Choban, A. Primak, D. Natarajan, L.J. Markoski, P.J.A. Kenis, “Air-Breathing Laminar Flow-Based Microfluidic Fuel Cell,” J. Am. Chem. Soc. 127 2005, pp.16758-16759. [17]R.S. Jayashree, A. Egas, J.S. Spendelow, D. Natarajan, L.J. Markoski, P.J.A. Kenis, “Air-Breathing Laminar Flow-Based Direct Methanol Fuel Cell with Alkaline Electrolyte,” Electrochem. Solid-State Lett. 9(5) 2006, pp.A252-A256. [18]M.H. Chanf, F.L. Chen, N.S. Fang, “Analysis of Membraneless Fuel Cell Using Laminar Flow in a Y-Shaped Microchannel,” J. Power Sources, in Press 2006. [19] D. Tromans, “Temperature and Pressure Dependent Solubility of Oxygen in Water: a Thermodynamic Analysis,” Hydrome. 48 1998, pp.327-342. [20] David. R. Lide, “CRC handbook of chemistry and physics,” CRC Press, 1975. [21] T.K. Sherwood, R.L. Pigford, C.R. Wilke, “Mass Transfer.” [22] A. Fischer, J. Jindra, H. Wendt, “Porsity and Catalyst Utilization of Thin Layer Cathodes in Air Opereted PEM-Fuel Cells,” J. Appl. Electrochem. 28 1998, pp.277-282. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/33819 | - |
| dc.description.abstract | 摘 要
本論文使用商業套裝軟體CFDRC考慮質傳、流場、電化學效應，針對平板式無薄膜燃料電池之傳輸現象、電池性能、氧氣消耗率作模擬分析。此燃料電池分別以甲酸、氧氣溶於硫酸溶液為燃料、氧化劑，而兩溶液分別由燃料電池兩入口流入流道，在流道內相鄰成層流，取代了薄膜。而論文中以有限體積法(Finite Volume Methode)求解統御方程式，考慮改變實驗可行之參數：濃度、流量、流道外型等，探討無膜燃料電池之傳輸現象、電池性能、氧氣消耗率，找尋出能改善電池性能之有效參數，藉由本研究將有助於平板式無薄膜燃料電池之設計。研究結果顯示，陰極側傳輸現象主導平板式無薄膜燃料電池之性能，藉由高流量、高氧氣濃度或者較厚的陰極觸媒層可以有顯著改善，但高流量和陰極觸媒層厚度之影響效果有限，意味兩參數皆存在一最佳值，其原因主要還是陰極側低傳輸現象所致。此外，流道外型亦為影響電池性能之重要參數，改變流道長度、寬度即是改變反應面積，燃料電池之總電流、總功率也隨之增加；流道厚度對於燃料電池之內電阻、氧氣消耗率有顯著的影響，流道厚度薄者，內電阻越小電池性能越好，但易發生燃料穿透，所以需要高流量防止燃料穿透，然而同截面流速下流道薄者其氧化劑供給量倍減，但電池性能因內電阻變小而增加，於是氧氣消耗率隨之倍增。 | zh_TW |
| dc.description.abstract | ABSTRACT
The transport of oxygen, the cell performance and oxidant utilization in the planar membraneless microchannel fuel cell (PM2FC) are considenred by numerical simulation in this study. The physical model including the mass transport, the flow and the electrochemistry is simulated by commercial software CFDRC. The fuel is formic acid dissolved in dilute sulfuric acid solutions. Then the oxidant is oxygen dissolved in dilute sulfuric acid solutions. Both fuel and oxidant streams enter and flow in parellel through the microchannel. In the microchannel the occurrence of laminar flow separates both streams and eliminates the need of a membrane. This study solves governing equations through finite volume methode. It considers the effects of the flow, the concentration, and the geometric size of the system to examine the transport of oxygen, the cell performance and oxidant utilization of the PM2FC and to find singnificant parameters helpful to the cell performance. The results are helpful to the design of PM2FC. The results show that the cell performance of PM2FC is mainly restricted by the transport of oxygen in the cathode, which can be improved significantly by using higher flow rate or oxygen concentration, or a thicker catalyst layer. However, the effects of the flow rate and thickness of catalyst layer are limited, which is limited by the low transport of the cathode electrode. It signifies that two parameters must exist optimal conditions. Besides, the geometry of the microchannel is an important parameter to improve the cell performance. To change the length or width of the microchannel is equal to change the reaction area, which makes the current and power of the fuel cell increase. The thickness of the microchannel influences obviously the ohmic losses and oxidant utilization. The thiner mirochannel has less ohmic losses and better cell performances but tends to have the fuel crossover, which we need high flow rate to prevent. However at the same velocity the thiner microchannel offers less flux of the oxidant stream, the cell performance increases because of more ohmic losses. Then oxidant utiliztion increases. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-13T05:46:46Z (GMT). No. of bitstreams: 1 ntu-95-R92543078-1.pdf: 3195305 bytes, checksum: 70537b8f10657bc5a49d67621c5102a9 (MD5) Previous issue date: 2006 | en |
| dc.description.tableofcontents | 目 錄
中文摘要................................................iii 英文摘要..................................................v 表目錄..................................................vii 圖目錄.................................................viii 符號說明...............................................xiii 一、 序論.............................................1 1.1燃料電池發展歷史.......................................1 1.2燃料電池基本原理.......................................2 1.3文獻回顧...............................................3 1.4研究動機..............................................11 二、理論分析.............................................15 2.1平板式無薄膜燃料電池工作原理..........................15 2.2基本假設..............................................16 2.3流場分析..............................................17 2.4濃度場分析............................................18 2.5電場分析..............................................19 2.6邊界條件..............................................21 三、數值方法.............................................23 3.1CFDRC軟體簡介.........................................23 3.2有限積分法............................................24 3.3有限差分法............................................27 3.4收斂標準..............................................27 3.5格點測試..............................................28 四、結果與討論...........................................32 4.1流量效應..............................................33 4.2濃度效應..............................................35 4.3觸媒層效應............................................38 4.4陽陰極流道厚度比效應..................................40 4.5陽陰極流量比效應......................................43 4.6流道長度效應..........................................44 4.7流道寬度效應..........................................47 五、結論與建議...........................................71 5.1結論..................................................71 5.2未來研究方向與建議....................................73 參考文獻.................................................74 | |
| dc.language.iso | zh-TW | |
| dc.subject | 微型燃料電池 | zh_TW |
| dc.subject | 無膜燃料電池 | zh_TW |
| dc.subject | Miro fuel cells | en |
| dc.subject | Membraneless micro fuel cells | en |
| dc.title | 平板式微型無薄膜燃料電池性能分析 | zh_TW |
| dc.title | Analysis of Planar Membraneless Micro Fuel Cell Performance | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 94-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 陳朝光,顏維謀,宋齊有,張敏興 | |
| dc.subject.keyword | 無膜燃料電池,微型燃料電池, | zh_TW |
| dc.subject.keyword | Membraneless micro fuel cells,Miro fuel cells, | en |
| dc.relation.page | 75 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2006-07-12 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 應用力學研究所 | zh_TW |
| 顯示於系所單位： | 應用力學研究所 | |
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