臺灣博碩士論文加值系統

本論文主要在探討毛細結構對網目式熱管性能之影響，其中包含了性能的測試，以及利用實驗所得結果，以釐清單層及雙層金屬網熱管中，滲透率與網目數及網目線徑的關係，提供往後設計熱管內部毛細構造之參考。
在實驗方面，在熱管外部尺寸固定的條件下，改變內部毛細結構參數，包括網目數(線徑)、金屬網層數，進行測試。觀察並紀錄在這些變更條件下熱管之加熱端與冷凝端的表面溫差與最大熱傳率的情形。實驗的結果顯示:(1) 網目數愈多、線徑愈小的金屬網目，其毛細限最大熱傳率愈低。同時具有雙層金屬網之熱管，其毛細限最大熱傳率高於單層金屬網之熱管(2) 網目數愈多、 線徑愈小的毛細構造，其熱阻愈低。而具有雙層數金屬網的熱管，有較高的熱阻。再利用實驗測量所得的毛細極限熱傳率，倒算出單層及雙層金屬網的滲透率，以釐清其與網目數及網目線徑的關係，以供實際設計製造單層及雙層熱管者參考之用。

The capillary limits and permeability of mesh-type heat pipes are determined experimentally. Metal screens with different mesh numbers、 wire diameters and number of layers are employed in this study. The influence of these parameters on the thermal performances of heat pipes are examined. The experimental results show: (1) The maximum heat transport capacity of heat pipes increases with increasing mesh layers and with decreasing mesh number (increasing mesh wire radius).(2)The thermal resistance of heat pipes decreasing with increasing mesh number(decreasing mesh wire radius) and with decreasing mesh layers.

中文摘要……………………………………………………………….Ⅰ
英文摘要……………………………………………………………….Ⅱ
目錄…………………………………………………………………….Ⅲ
圖目錄………………………………………………………………….Ⅴ
表目錄………………………………………………………………….Ⅶ
符號說明……………………………………………………………….Ⅷ
第一章序論……………………………………………………….….1
1.1 前言……………………………………………………….….1
1.2 文獻回顧………………………………………………………3
1.3 研究目的………………………………………………………4
1.4 內容大綱………………………………………………………5
第二章熱管的操作極限……………………………………………..6
2.1 毛細極限……………………………………………………….6
2.1.1液-氣界面間的毛細壓…………………………………..7
2.1.2蒸氣壓力降……………………………………………….8
2.1.3 液相壓力降……….…………………………………….9
2.1.4 體積力………………………………………………….11
2.1.5 毛細構造極限之最大熱傳率………………………..12
2.2 粘滯極限…………………………………………………….13
2.3 飛散極限…………………………………………………….13
2.4 音速極限…………………………………………………….14
2.5 沸騰極限…………………………………………………….15
2.6 熱阻………………………………………………………….15
第三章實驗設備與方法…………………………………………….17
3.1 實驗設備…………………………………………………….17
3.2 熱管的製作………………………………………………….19
3.3 實驗安裝過程……………………………………………….20
3.4 熱損失的估計……………………………………………….22
3.5 熱電偶之校正……………………………………………….23
第四章 實驗結果與討論……………………………………………..24
4.1 實驗結果分析……………………………………………..24
4.1.1 熱管毛細極限的判定……………………………….24
4.1.2熱傳率……………………………………………....25
4.1.3 熱阻………………………………………………….26
4.2理論與實驗對照……………………………………………...27
4.2.1 熱阻的比較…………………………………………27
4.2.2 最大熱傳率的比較………………………………..28
第五章 結論與建議………………………………………………..30
5.1 結論……………………………………….…………………30
5.2 建議………………………………………………………….31
參考文獻……………………………………………………………….32
附錄 (A) 單層金屬網目熱管之軸向溫度分布及熱阻……………..61
附錄 (B) 雙層金屬網目熱管之軸向溫度分布及熱阻……………..69

[1] Nguyen, T., Mochizuki, M., K., Saito, Y.,Sauciuc, I,.and boggs, R.,“Advance Cooling System Using Miniature Heat Pipe in Movie PC,” The sixth Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, pp.507-511,1998.
[2] Xie, H, Ali, A., and Bhatia, R., “The use of Heat Pipe in PersonalComputers,” The Sixth Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, 1998. ITHERM ’98., pp.422-448. 1998.
[3] Dunn, P. D., and Reay, D. A., Heat Pipes, Pergamon, Oxford, 1994.
[4] Gaugler, R.S., US Patent Application. Dec.12,1942. Published US Patent NO.2350348, June 1944.
[5] Grover, G. M., and Cotter T. P., and G.F. Erickson, “Structure of very high thermal conductance.” J. App. Phys. Vol.35, p1990,1964.
[6] Grover, G. M., US Patent NO.3229759. Filed 1963.
[7] Cotter, T. P., Theory of Heat Pipes, Los Alamos Science Lab. Report NO. LA-3246-MS,1965.
[8] Levy, E. K., ”Theoretical Investigation of Heat Pipes Operating at Low Vapor Pressure,” J. Engineering for Industry, Vol. 90, pp.547-552. 1968.
[9] Tien, C.L., and Sun, K.H., “Minimun meniscus radius of heat pipe with a wicking materials.” ,Int. J. Heat Mass Transfer 14, pp.1853-1855,1970.
[10] Asselman, G. A. A., and Green, D. B.,”Heat Pipes,” Phillips Technical Review,1973, vol. 16, pp.169-186.
[11] Busse, C.A., “Pressure Drop in the Vapor Phase of Long Heat Pipe,” Proceedings of International Thermionic Conversion specialist conference, IEEE, New York. 1967.
[12] Kimura, H., Itagaki, H., and Sakura, Y., Transient performance of gas-loaded variable conductance heat pipes with a hot reservoir, Pergamon Press , pp.589-600,1982.
[13] 依日光譯，熱管技術理論實務，日本熱管技術協會編，復漢出版社,1986.
[14] Zhou, J., Yao, Z., and Zhu, J., “Experimental Investigation of application Characters of Micro Heat Pipes,” Heat pipe conf, Beijing, China. 1992.
[15] Cao, Y., Gao, M.., and Pinilla, E., “Fabrication and Test of a Fillinf station for Micro/Miniature Devices”, Proceedings of the 32nd Intersociety Energy Conversion Engineering Conference,1997. IECEC-97., vol.2, pp.1509-1513.1997.
[16] 陳明生，小型熱管製造、性能測試與熱輸送現象之研究，國立台北科技大學機電整合技術研究所碩士學位論文，1999.
[17] Xie, H, Mostafa, A., Wendy, L., and Kevin, H., “Thermal Solutions to Pentium Processors in TCP in Notebooks and Sub-Notebooks,” IEEE Transactions on Components, Packaging, and Manufacturing Technology, part A, Vol.19, No.1, pp. 54-65. March 1996.
[18] 李青洲，熱管之最大熱傳量與有效長度之關係，國立台灣科技大學機械工程研究所碩士學位論文，2000.
[19] 賴錦川，燒結式微熱管毛細結構參數之影響研究。國立台灣大學機械工程研究所碩士學位論文，2000.
[21] Marten, T., and Johan, G., Heat Pipes: Construction and Application, Elsevier, Science Publishing Co., Inc.
[22]Peterson, G. P., An introduction to Heat Pipe, Wiley, New York.1994.
[23] Dunn, P., and Reay, D. A., Heat Pipes, Second Edition, A. Wheaton & co., LTd.
[24] Chi, S. W., Heat Pipe Theory and Practice, McGraw-Hill,New York. 1976.