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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 陳瑤明 | |
dc.contributor.author | Wei-Cheng Chou | en |
dc.contributor.author | 周煒程 | zh_TW |
dc.date.accessioned | 2021-06-13T00:00:55Z | - |
dc.date.available | 2007-08-03 | |
dc.date.copyright | 2007-08-03 | |
dc.date.issued | 2007 | |
dc.date.submitted | 2007-07-30 | |
dc.identifier.citation | Baldassarre, J. G., Gernert, N. J., and Gottschlich, J., “Loop Heat Pipe for Avionics Thermal Control,” SAE Paper No.961318, 1996.
Barmann, J., Cullimore, B., Ambrose, J., Buchan, E., and Yendler, B., “A Methodology for Enveloping Reliable Start-up of LHPs,” AIAA Meeting Paper No.2000-2285, 2000. Boo, J. H., and Chung, W. B., “Thermal Performance of a Small-Scale Loop Heat Pipe with PP Wick,” 13th International Heat Pipe Conference, Shanghai, China, 21-25 September 2004. Chi, S. W., “Heat Pipe Theory and Practice,” McGraw-Hill, New York, 1976. Cytrynowicz, D., Hamdan, M., Medis, P., Shuja, A., Henderson, H. T., Gemer, F. M., and Golliher, E., “MEMS Loop Heat Pipe Based on Coherent Porous Silicon Technology,” AIP Conference Proceedings, No. 608, pp.220-232, 2002. Dickey, J. T., and Peterson, G. P., “Experimental and Analytical Investigation of a Capillary Pumped Loop,” Journal of Thermophysics and Heat Transfer, Vol.8, No.3, pp. 602-607, 1994. Faghri, A., “Heat Pipe Science and Technology,” Taylor & Francis, Washington, DC., 1995. Gaugler, R. S. US Patent Application. Dec. 21, 1942. Published US Patent No.2350348. 6 June 1944. Hoang, T. T., and Kaya, T., “Mathematical Modeling of Loop Heat Pipes,” AIAA Paper No.99-0477, 1999. Hou, Q., Dirk, W., Grijpma, and Feijen, J., “Porous Polymeric Structures for Tissue Engineering Prepared by a Coagulation, Compression Moulding and Salt Leaching Technique,” Biomaterials, Vol.24, pp.1937-1947, 2003. James, E. M., “Polymer Data Handbook,” Oxford University Press, New York, 1999. Kaya, T., Baker, C., and Ku, J., “Comparison of Thermal Performance Characteristics of Ammonia and Propylene Loop Heat Pipes,” SAE Paper No.2000-01-2406, pp.580-586, 2000. Kaya, T. and Ku, J., “Thermal Operational Characteristics of a Small-Loop Heat Pipe,” Journal of Thermophysics and Heat Transfer, Vol. 17 No. 4, October-December 2003. Kobayashi, T., Ogushi, T., Haga, S., Ozaki, E., and Fujii, M., “Heat Transfer Performance of a Flexible Looped Heat Pipe Using R134a as a Working Fluid: Proposal for Method to Predict the Maximum Heat Transfer Rate of FLHP,” Heat Transfer-Asian Research, Vol. 32, No. 4, pp.306-318, 2003. Ku, J., Operating Characteristics of Loop Heat Pipes,” SAE Transactions, Vol. 108, Part. 1, pp.503-519, 1999. Ku, J., Rogers, P., and Cheung, K., “Investigation of Low Power Operation in a Loop Heat Pipe,” SAE Technical Paper, No.2001-01-2192, 2001. Launay, S., Sartre, V., Bonjour, J. “Parametric Analysis of Loop Heat Pipe Operation: A Literature Review,” International Journal of Thermal Sciences, Vol.46, No.7, pp.621-636, 2007. Liao, C. J., Chen, C. F., Chen, J. H., Chiang, S. F., Lin, Y. J., and Chang, K. Y., “Fabrication of Porous Biodegradable Polymer Scaffolds Using a Solvent Merging/Particulate Leaching Method,” John Wiley & Sons, Inc., pp.676-681, 2001. Maidanik, Y. F., Vershinin, S., Kholodov, V., and Dolgire, J., “Heat Transfer Apparatus,” U.S. Patent, No.4515209, 1985. Maidanik, Y. F., Fershtater, Y. G., and Sododovnik, N. N., “Loop Heat Pipes: Design, Investigation, Potential,” SAE Paper No.941185, 1994. Maidanik, Y. F., Pastukhov, V. G. and Chernyshova, M. A., “Development and Investigation of Miniature Loop Heat Pipe,” SAE Technical Paper, No.1999-01-1983, pp.483-487, 1999. Maidanik, Y. F., Vershini, S.V., and Chernysheva, M. A., “Development and Tests of Miniature Loop Heat Pipe with a Flat Evaporator,” SAE Paper No.2000-01-2491, pp.652-656, 2000. Maidanik, Y. F., “Review: Loop Heat Pipes,” Applied Thermal Engineering, Vol. 25, pp.635-657, 2005. Mikos, A. G., Thorsen, A. J., Czerwonka, L. A., Bao, Y., Langer, R., Winslow, D. N., and Vacanti, J. P. “Preparation and Characterization of Poly(L-lactic acid) Foams,” Polymer, Vol. 35, No. 5, pp.1068-1077, 1994. Pastukhov, V. G., and Maydanik, Y. F., “Low-Noise Cooling System for PC on the Base of Loop Heat pipes.” Applied Thermal Engineering, Vol. 27, pp.962-968, 2007. Riehl, R. R. and Siquerira, Tulio C. P.A., “Evaluating Loop Heat Pipes Performance Regarding Their Geometric Characteristic,” SAE Technical Paper, No.2005-01-2882, 2005. White, F. M., “Fluid Mechanics,” McGraw-Hill, New York, 1979. Wolf, D. A., Ernst, D. M., and Philips A. L., “Loop Heat Pipes-Their Performance and Potential,” SAE Paper No.941575, 1994. Yao, W., Miao, J., Shao, X., “Parametric analysis on LHP/CPL Evaporator performance and Critical Heat Flux by Two-Dimensional Calculation,” 13th International Heat Pipe Conference, Shanghai, China, 21-25 September 2004, pp.125-132. 王鵬凱, “應用於迴路式熱管高分子毛細結構之製造研究,” 國立台灣大學碩士論文, 2004. 鄭少傑, “具高分子毛細結構迴路式熱管之性能測試,” 國立台灣大學碩士論文, 2004. 劉秉翰, “高分子毛細結構在迴路式熱管之應用研究,” 國立台灣大學碩士論文, 2005. 葉建志, “脫脂毛細結構對迴路式熱管之影響,” 國立台灣大學碩士論文, 2005. 林俊宇, “應用於迴路式熱管之高分子毛細結構參數探討,” 國立台灣大學碩士論文, 2006. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/28088 | - |
dc.description.abstract | 本文旨在研究高分子毛細結構參數對迴路式熱管熱傳性能之影響。毛細結構為影響迴路式熱管性能的重要元件之一,目前毛細結構大多以金屬粉末燒結的方式來製作,其毛細結構參數(有效孔徑、滲透度、孔隙度)會受到金屬粉末粒徑、形狀、燒結溫度、燒結時間等因素所影響,因此不易控制其參數來進行探討。近年來,迴路式熱管逐漸朝向小型化發展,然而在朝小型化發展的同時,亦突顯了熱洩漏的問題,因此本文擬以生醫領域中的鹽溶濾法,搭配使用低熱導係數的高分子材料-聚苯乙烯來製作毛細結構,藉由改變氯化鈉粒徑大小及其在高分子材料中的比例來調控有效孔徑與孔隙度,進而探討孔隙度、有效孔徑與滲透度三者參數間之關係;經實際量測以鹽溶濾法所製作之高分子毛細結構,其有效孔徑量測值落於控制粒徑範圍內,孔隙度可精確控制於平均絕對誤差1.65%內,搭配不同的實驗參數,可找出滲透度與孔隙度之相關經驗公式 ,將有助於迴路式熱管之設計及熱傳性能上的預測。
實驗結果顯示,在製程條件允許下,當毛細結構厚度愈薄、有效孔徑愈小、孔隙度愈大時,其熱傳性能越好。故將毛細結構厚度1.75mm、孔隙度80%、有效孔徑 、滲透度 的高分子毛細結構置入迴路式熱管中進行熱傳性能測試,在蒸發器表面溫度85℃的限制條件下,熱傳量可達300W,熱阻為0.25 ℃/W,與相近參數之金屬毛細結構比較,其熱傳性能相接近。再者,高分子毛細結構相較於金屬毛細結構,在製作特性上具有製作成本低、參數易控制與加工性佳等優點,將有助於提昇迴路式熱管的應用潛力。 | zh_TW |
dc.description.abstract | This research focuses on the parametric analysis of a polymer wick for the heat transfer performance of loop heat pipe. The parameters on the wick structure, including pore radius, porosity, and permeability. It is difficult to predict and control well in the manufacturing method of sintered metal powder. Then, small form factor LHP causes the problem of the heat transpiration easily. Therefore, polystyrene which is low thermal conductivity coefficient is chosen as the material and is fabricated by salt leaching. Adjusting the size of sodium chloride powder and its percentage in the polystyrene material, it could not only control the pore radius and porosity efficiently, but also be discussed the relationship of the parameters deeply among them. The results of the test show that the pore size parameter lies in the desired range, and the porosity is able to be controlled within 1.65% MAE. With repeatedly tests, a formula between permeability and porosity expresses as Kw=6.24×10-23ε6.87. Furthermore, this would promote both the LHP design and the prediction of heat transfer.
What the results of the test reveal when the smaller the thinness and pore radius are, and the bigger the porosity is , the heat transfer would be much better. Hence, a wick structure with the thinness of 1.5mm, the pore radius of 0~20 micron, the porosity of 80%, and the permeability of 9.2×10-12m2 is installed into a LHP system to carry out the performance. The capacity of heat transfer in LHP with polymer wick structure approaches 300W, the thermal resistant is 0.25℃/W under the evaporator temperature of 85℃. The same result could be discovered within sintered metal powder method. In short, polymer wick structure, comparing with metal wick structure, has some advantages in the characteristics in its production, such as low cost, easily controllable, perfect processing, and so forth. Moreover, these merits would promote the potential of LHP as much as possible. | en |
dc.description.provenance | Made available in DSpace on 2021-06-13T00:00:55Z (GMT). No. of bitstreams: 1 ntu-96-R91522301-1.pdf: 1849864 bytes, checksum: ea6184bec2ac94d5cdd242abd2f49b26 (MD5) Previous issue date: 2007 | en |
dc.description.tableofcontents | 致 謝 I
中文摘要 II Abstract III 目錄 IV 圖目錄 VII 表目錄 VIII 符號說明 IX 第一章 緒論 1 1.1前言 1 1.2文獻回顧 5 1.3研究目的 9 第二章 實驗原理及理論分析 11 2.1 迴路式熱管操作原理 11 2.1.1 毛細限制 12 2.1.2 啟動限制 13 2.1.3 液體過冷度限制 14 2.2 理論分析 14 2.2.1 壓降理論分析 14 2.2.1.1 液-汽界面毛細壓差 15 2.2.1.2 蒸發器溝槽內蒸汽流動壓降 16 2.2.1.3 汽體段流動壓降 16 2.2.1.4 流經毛細結構之壓降 17 2.2.1.5 液體段及冷凝段流動壓降 18 2.2.1.6 重力壓降 19 2.2.2 熱阻分析 20 2.2.2.1 蒸發器熱阻 20 2.2.2.2 冷凝器熱阻 23 2.3 補償室體積與工作流體注入量 24 2.3.1 補償室體積 24 2.3.2 工作流體注入量 24 第三章 實驗設備與方法 26 3.1 實驗材料 26 3.2 實驗設備 27 3.2.1 毛細結構製造設備 27 3.2.2 毛細結構參數量測設備 29 3.2.3 熱傳性能測試設備 30 3.3 實驗方法 31 3.3.1 毛細結構參數之量測方法 31 3.3.1.1 有效孔徑 31 3.3.1.2 孔隙度 33 3.3.1.3 滲透度 33 3.3.2 高分子毛細結構製作方法 33 3.3.2.1 高分子毛細結構製作方式之評比與選擇 34 3.3.2.2 鹽溶濾法 35 3.3.3鹽溶濾法製程中各項材料之選擇 37 3.3.3.1 高分子材料 37 3.3.3.2 溶劑 39 3.3.3.3 孔洞成型劑 40 3.3.3.4 非溶劑 41 3.4 實驗步驟 41 3.4.1 高分子毛細結構製作步驟 41 3.4.2 迴路式熱管系統之安裝步驟 45 3.4.3 性能測試步驟 45 3.5 誤差分析 47 3.6 實驗參數 47 第四章 結果與討論 49 4.1 毛細結構參數之量測 50 4.1.1 有效孔徑 50 4.1.2 孔隙度 51 4.1.3 滲透度 52 4.1.4 毛細結構參數間之影響 55 4.2 迴路式熱管熱傳性能量測 56 4.2.1 具高分子毛細結構迴路式熱管典型現象探討 57 4.2.1.1啟動行為 57 4.2.1.2 可變熱阻與固定熱阻 61 4.2.2有效孔徑對迴路式熱管熱傳性能之影響 62 4.2.3孔隙度對迴路式熱管熱傳性能之影響 65 4.2.4 毛細結構厚度對迴路式熱管熱傳性能之影響 68 4.3高分子毛細結構與金屬毛細結構之熱傳性能比較 71 4.3.1 冷態測試 71 4.3.2 迴路式熱管熱性能測試 72 4.3.3 毛細結構特性比較 74 第五章 結論與建議 76 5.1 結論 76 5.2 建議 77 參考文獻 78 附錄 82 | |
dc.language.iso | zh-TW | |
dc.title | 高分子毛細結構參數對迴路式熱管性能之影響 | zh_TW |
dc.title | Parametric Analysis of a Polymer Wick
for Loop Heat Pipe | en |
dc.type | Thesis | |
dc.date.schoolyear | 95-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 吳聖俊,劉君愷 | |
dc.subject.keyword | 迴路式熱管,鹽溶濾法,高分子毛細結構, | zh_TW |
dc.subject.keyword | polystyrene,salt leaching,loop heat pipe, | en |
dc.relation.page | 101 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2007-07-31 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
顯示於系所單位: | 機械工程學系 |
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