Management of the Air-Flow and Electrolyte of the Zn-Air Fuel Cell 簡上揚、黃國修
E-mail: 9419912@mail.dyu.edu.tw
ABSTRACT
The objective of this thesis is to examine numerically the effects of inlet gas velocity on the reactant oxygen transports and cell performance of zn-air fuel cell. To the end, a CFDRC software with the numerically scheme of the method of finite volume is used.
Additionally, the model of zn-air fuel cell is preliminarily assumed to be three dimensional. In the section of results and discussion, the effects of inlet oxygen velocity and electrolyte velocity on the local current density, reactant oxygen、water transports and operation voltage, are well examined. These local results are useful for the design of the zn-air fuel cell and can effectively improve the cell performance. The predicted results show when the oxygen velocity effect is taken into in the modeling, the effect of air velocity and electrolyte velocity can be neglected for the operation condition of voltage being large than 1V, but low operation condition of voltage being small than 1V, the effect of air velocity and electrolyte velocity cannot be neglected. Because the predicted results show, air velocity announced the 1m/s and 2m/s approach of cell performance. Therefore, for the inlet velocity effect, it is cleanly seen that the better cell performance is not high inlet velocity for a system. Additionally, the predicted results show, high electrolyte velocity results low cell performance in the operation condition of voltage being small than 1V. The last predicted results show, for the operation voltage to effect cell performance. The high operation voltage was need high oxygen.
Keywords : zn-air fuel cell, oxygen transports, water transports ; design ; system Table of Contents
封面內頁 簽名頁 授權書 iii 中文摘要 v 英文摘要 vi 誌謝 vii 目錄 viii 圖目錄 ix 表目錄 xii 符號說明 xiii 第一章 問題描述 1 1.1 緣起 1 1.2 本文目標 4 第二章 國內外有關本問題之研究情況 7 2.1 空氣流的管理與控制 7 2.2 電解液的管理與控制 15 2.3 電 池環境參數 24 第三章 研究方法與進行步驟 31 3.1 鋅空氣燃料電池分析 31 3.2 鋅空氣燃料電池研究架構 33 3.2.1 空氣流的 管理及控制 33 3.2.2 電解液的管理及控制 34 3.3 數學模型 36 3.3.1 Solid Model的建立 36 3.3.2 數值分析 44 3.4 格點驗證 51 3.5 邊界條件設定 52 第四章 結果與討論 54 4.1空氣流的管理及控制 54 4.1.1空氣流道入口速度 55 4.1.2電池操作電壓影響 57 4.2電解液的管理及控制 67 4.2.1電解液流道入口速度 67 4.2.2電池操作電壓影響 68 第五章 結論與未來工作 79 參考文獻 81 REFERENCES
[1] Simon, F. “Marketing Green Products in the Trial,” Columbia Journal of World Business, Fall & Winter, p.269-285, 1992.
[2] 李國霖，鋅空氣燃料電池，電子技術期刊，p.10-20，2001。
[3] 林岱儀，無機添加物對鋅電極在氫氧化鉀溶液中鈍化影響之研究，國立臺灣科技大學碩士論文，2000。
[4] Vincent, C. A., “Modern Batteries,” Thomso Litho Ltd., p.98, 1984.
[5] Mantell, C. L., “Batteries and Energy System,” 2nd ed., McGraw-Hill Publishing Company, 1983.
[6] Schimpf, M., “Rechargeable Zinc Air Batteries Market and Technology Overview,” Wescon/’93 Conference Record, p.285-290, 1993.
[7] 鄭慧雯，鋅空氣電池之放電特性與鋅陽極回收研究，國立清華大學碩士論文，2000。
[8] Riezenman, M. J., “The Search for Better Batteries,” IEEE spectrum, p.51-56, 1995.
[9] Culter, T., “a Design Guide for Rechargeable Zinc Air Battery Technology,” southcon/96 conference record, p.616-621, 1996.
[10] Sieminski, D., “Recent Advances in Rechargeable Zinc Air Battery Technology,” Battery Conference on Application and Advances, p.171-180, 1997.
[11] Sieminski, D., “Primary Zinc-Air for Portable Electronic Consum-er Products,” The Fifteenth Annual Battery Conference on Applications and Advances, p.115-120, 2000.
[12] Tinker, L. A., “Advances in Air Manager Technology for Zinc Air Batteries,” Application and Advances, p.319-322, 2001.
[13] 蘇聖傑，鋅空氣電池陰極材料製備與特性分析，國立臺灣大學碩士論文，2000。
[14] 賴耿陽，最新電池工學，復漢出版社，1990。
[15] 郭自強，對電動車用鋅空電池看法，第三次全國輕型電動車會議論文集，p.30，2001。
[16] Colborn, J. and Smedley, S., “Ultra-Long Duration Backup for Telecommunications Applications Using Zinc/Air Regenerative Fuel Cells,
” Telecommunication Energy Conference, p.576-581, 2001.
[17] Putt, R.A. and Merry, G.W., “Zinc-Air Primary Batteries,” IEEE 35th Power Sources International Symposium, p.30-33, 1992.
[18] Linden, D., “Handbook of Batteries,” McGraw-Hill Publishing Company, 1994.
[19] Sieminski, D., “Primary Zinc-Air for Portable Applications,” Battery Conference on Applications and Advances, p.209-213, 1999.
[20] 李升憲、朱紹山、李海，用於移動電話的鋅空氣電池研究，第三次全國輕型電動車會議論文集，p.28，2001。
[21] 陳瑞凱、鄭慧雯、李裕安、徐統、戴念華，鋅陽極製程因素探討，第三次全國輕型電動車會議論文集，p.27，2001。
[22] Siu, S. and Evans J. W., “Flow and Transport Due to Natural Convection in a Galvanic Cell,” Journal of the Electrochemical Society, p.2705-2711, 1997.
[23] CFD-ACE(U), CFD Research Corporation, Alabama, USA, 2003.
[24] Mao, Z. and White, R. E., “Mathematical Modeling of a Primary Zinc/Air Battery,” Journal of the Electrochemical Society, p.1105-1115, 1992.
[25] Devan, S., Subramanian, V. R., and White, R. E., “Analytical Solution for the Impedance of a Porous Electrode,” Journal of the Electrochemical Society, p.A905-A913, 2004.
[26] Deiss, E., Holzer, F., and Haas, O., “Modeling of an Electrically Rechargeable Alkaline Zn-Air Battery,” Electrochimica Acta 47, p.3995-4010, 2002.
[27] 張桐生，電池組與能源系統，徐氏基金會，1989。
[28] 萬其超，電化學，臺灣商務印書館，1992。
[29] 閻路，電池學，東華書局，1987。
[30] 許逸達，質子交換膜燃料電池流場數值模擬，元智大學碩士論文，2002。
[31] 李明哲，非均勻系觸媒反應的理論與應用，復文書局，1986。
[32] 涂正輝，質子交換膜燃料電池之三維流道設計與熱質傳分析，國立成功大學碩士論文，2003。
[33] 林邦驥，鋅空氣電池鈣鈦礦氧化物空氣陰極之研究，中國文化大學碩士論文，1999。
[34] 高振裕，鋅空氣電池系統之陽極與電解液基本性質研究，國立清華大學碩士論文，1999。
[35] 賴耿陽，多孔材料學，復漢出版社，1990。
[36] 曾建穎，燃料電池新型流道之設計，華梵大學碩士論文，2002。
[37] 劉霖錡，鋅空氣電池空氣極的製備與性能，逢甲大學碩士論文，2003。
[38] 楊承穎，入口氣體濕度對二維質子交換膜燃料電池性能之影響，華梵大學碩士論文，2004。
[39] Ong, I. J. and Newman, J., “Double-Layer Capacitance in a Dual Lithium Ion Insertion Cell,” Journal of the Electrochemical Society, p.4360-4365, 1999.
[40] 田福助，電化學理論與運用，新科技書局，2000。
