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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 陳瑤明(Yau-Ming Chen) | |
| dc.contributor.author | Ta-Li Chou | en |
| dc.contributor.author | 周大立 | zh_TW |
| dc.date.accessioned | 2021-06-15T13:43:55Z | - |
| dc.date.available | 2016-02-02 | |
| dc.date.copyright | 2016-02-02 | |
| dc.date.issued | 2015 | |
| dc.date.submitted | 2015-12-14 | |
| dc.identifier.citation | [1]Gerasimov Y.F, Chogolev G. T., and Maidanik Y.F., “Heat Pipe.” USSR Inventor's Certificate 4492131974, 1974.
[2]Maidanik Y.F, Vershinin S.V, Kholodov V.F, and Dolgrev Y.E, “Heat Transfer Apparatus,” U.S. Patent 4515209, 1984. [3]Maidanik Y.F, Fershtater Yu.G, and Pastukhov V.G, “Loop Heat Pipes: Development, Investigation and Elements of Engineering Calculations,” Ural Division of the USSR Academy of Sciences, 1989. [4]Maidanik Y.F, Fershtater Yu.G, and Goncharov K. A, “Capillary Pumped Loop for the Systems of Thermal Regulation of Spacecraft,” in Proc. of 4th European Symposium on Space Environmental Control Systems, Florence, Italy, Vol. 1, pp. 87-92,1991. [5]Maidanik Y.F, Fershtater Yu.G, and Pastukhov V.G, “Development and Investigation of Two-Phase Loopswith High-Pressure Capillary Pumps for Space Application,” in Proc. of the 8th International Heat Pipe Conference, Beijing, China, Sept. 14-19, pp.425-433, 1992. [6]Kobayashi, T., Ogushi, T., Haga, S., Ozaki, E., and Fujii, M., “Heat Transfer Performance of Flexible Looped Heat Pipe using R134a as a Working Fluid : Proposal for a Method to Predict the Maximum Heat Transfer Rate of FLHP,” Heat Transfer-Asian Research, Vol. 32, No. 4, pp. 306-318, 2003. [7]Ogushi, T., Yao, A., Xu, J.J., Masumoto, H., and Kawaji, M., “Heat Transport Characteristics of Fexible Looped Heat Pipe under Microgravity Condition,” Heat Transfer - Asian Research, Vol.32, No.5, pp.381-390, 2003. [8]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, September 21-25, 2004. [9]Riehl, R. R. and Siquerira, Tulio C. P.A., “Evaluating Loop Heat Pipes Performance Regarding Their Geometric Characteristic,” International Conference on Environmental Systems, Rome, Italy, July, 2005. [10]R.R. Riehl, T.C.P.A. Siqueira, “Heat Transport Capability and Compensation Chamber Influence in Loop Heat Pipe Performance,” Applied Thermal Engineering, 26, pp. 1158-1168, 2006. [11]Adoni, A.A., Ambirajan, A., Jasvanth, V.S., Kumar, D., and Dutta, P., “Effects of Mass of Charge on Loop Heat Pipe Operational Characteristics,” Journal of Thermophysics and Heat Transfer, Vol. 23, No. 2, pp.346-355, 2009. [12]Nagano,H., Fukuyoshi, F., Ogawa, H., and Nagai, H., “Development of an Experimental Small Loop Heat Pipe with Polytetrafluoroethylene Wicks,” Journal of Thermophysics and Heat Transfer, Vol. 25, No. 4, pp.547-552, 2011. [13]Nishikawara M., Nagano H., Kaya T., “Transient Thermo-Fluid Modeling of Loop Heat Pipes and Experimental Validation,” Journal of Thermophysics and Heat Transfer, Vol. 27, No. 4, pp.641-647, October-December 2013. [14]Marangoni, C. G. M., “Sull Expansiome dell Goccie di un Liquido Galleggianti sulla Superficie di Altro Liquido,” Tipografia del Fratelli Fusi, Pavia, 1865. [15]R Vochten, G Petre, “Study of the heat of reversible adsorption at the air-solution interface,” J. Colloid and Interface Science, Vol. 42, issue 2, pp. 320-327, 1973. [16]Abe Y., Iwasaki A., Tanaka K., “Microgravity Experiments on Phase Change of Self-Rewetting Fluids,” Ann. N.Y. Acad. Sci, Vol. 1027, pp. 269-285, 2004. [17]Savino, Raffaele, Anselmo Cecere, and Roberto Di Paola. “Surface Tension-Driven Flow in Wickless Heat Pipes with Self-Rewetting Fluids. ” International Journal of Heat and Fluid Flow 30.2 pp. 380-388, 2009. [18]N.Zhang, “Innovative heat pipe systems using a new working fluid,” International Communications in Heat and Mass Transfer, Vol. 28, issue 8,pp.1025-1033,2001. [19]Abe Y., “Self-Rewetting Fluids,” Ann. N.Y. Acad. Sci, Vol. 1077, pp. 650-667, 2006. [20]N. d. Francescantonioa, R.Savinoa, Y.Abe, “New Alcohol Solutions for Heat Pipes: Marangoni Effect and Heat Transfer Enhancement,” Int.J. Heat Mass Transfer, Vol. 51, issue 25-26, pp. 6199-6207, 2008. [21]Savino, Raffaele, . 'Marangoni Heat Pipe: An Experiment on Board MIOsat Italian Microsatellite.' Acta Astronautica 65.11: pp. 1582-1592, 2009. [22]Morovati M, Bindra H, Esaki S, Kawaji M, “Enhancement of Pool Boiling and Maximum Heat Flux in Self-Rewetting Fluids at Above Atmospheric Pressures,” in Proc. of 8th ASME-JSME Thermal Engineering Joint Conference, Vol. 1, pp. 1849-1854, 2011. [23]Yanxin Hu, 'Heat Transfer Enhancement of Micro Oscillating Heat Pipes with Self-Rewetting Fluid.' International Journal of Heat and Mass Transfer 70 pp. 496-503, 2014. [24]Moffat R. J., “Describing the Uncertainties in Experimental Results”, Experimental Thermal Fluid Science, Vol.1, no.1, pp. 3-17, 1988. [25]Chen S, Liu P, Zhu Z, Liu Q., “Experimental Study on Surface Tension of Several Alcohol Aqueous Solutions,” Journal of Beijing Jiaotong University, Vol. 32, no. 1, 2008. [26]Wu S. C., Wu C. Y., Lin W. J., Chen J. R., Chen Y. M., “Effect of Sintering Temperature and Time in Nickel Wick for Loop Heat Pipe with Flat Evaporator”, Applied Mechanics and Materials, Vols. 602-605, pp. 528-532, Aug. 2014 | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/51672 | - |
| dc.description.abstract | 本文旨在應用自再潤濕流體於迴路式熱管中提升其熱傳性能，並分別對於毛細結構材質為金屬(鎳)與高分子(鐵氟龍)時進行探討。自再潤濕流體(Self-rewetting fluid, 通常為高碳數醇類水溶液)擁有優異的潤濕能力，也具備使表面張力梯度逆轉之特性，當溫度達到特定值，其表面張力將隨著溫度增加而遞增。馬蘭哥尼效應(Marangoni effect)顯示高表面張力之流體會拉動低表面張力流體，形成表面張力之驅動流，有助於二相熱傳裝置內的低溫工作流體推往加熱端潤濕，延後乾涸現象發生並增加熱傳性能。
在表面張力的探討上，本研究量測不同濃度與成分的自再潤濕流體水溶液於25~70 oC時的表面張力值，選擇的工作流體為正丁醇(1-Butanol)，正戊醇(1-Pentanol)，正已醇(1-Hexanol)，二丁醇(2-Butanol)之水溶液，量測結果顯示自再潤濕流體水溶液於飽和濃度時擁有最高的正向表面張力梯度，其中以6 %正丁醇與20 %二丁醇最高，分別為0.30 mN/moC與0.27 mN/ moC。因此本文選用此兩者自再潤濕流體應用於迴路式熱管，探討其熱傳性能。當毛細結構為鎳時，迴路式熱管測試結果顯示當工作流體為6 %正丁醇與20 %二丁醇時，其最大熱通量相較於純水工作流體時的350 W分別提升了40 % (500 W) 與 70 % (600 W)，而最低系統總熱阻也從0.31 oC/W降至0.22 oC/W。 當毛細結構材質為鐵氟龍時，由於鐵氟龍的表面疏水性，純水無法作為其工作流體，因此本文利用自再潤濕流體的潤濕能力，克服純水無法通過鐵氟龍毛細結構之限制。實驗結果顯示當工作流體為20 %二丁醇時，最大熱負載可達250 W，最大熱通量為12.9 W/cm2，最低系統總熱阻為0.54 W/⁰C。最高熱通量與國外文獻平均3.6 W/cm2 比較後，高出了三至五倍。 | zh_TW |
| dc.description.abstract | The objective of this study is the application of self-rewetting fluid as the working fluid on loop heat pipe (LHP), with nickel and teflon(PTFE) as the capillary structure materials respectively. Self-rewetting fluids, generally the dilute aqueous solutions of high carbon alcohols(number of carbon atoms ≥ 4), shows not only better wettability compared with pure water but also a special thermophysical effect that the surface tension increases with increasing temperature. Since the Marangoni effect induces a flow from liquid with lower surface tension to the liquid with higher surface tension, which results a liquid flow to hotter interface, it is advantageous to use self-rewetting fluid as working fluid on heat-transfer devices.
In this study, we measure the surface tension of different self-rewetting fluids at different concentration in the temperature range 25~70 oC, and the working fluids of 1-butanol, 1-pentanol, 1-hexanol and 2-butanol(isomer of 1-butanol) are choosed. The result shows that self-rewetting fluids possess higher positive surface tension gradient('σ' _'T' ) at saturation. Furthermore, the 1-butanol (6%) and 2-butanol (20%) show higher 'σ' _'T' than others, which are 0.27 mN/moC and 0.30 mN/moC respectively. These two self-rewetting fluids are then applied to the LHP with nickel capillary structure. The maximum heat load are 500W and 600W relatively when the working fluid is 1-butanol (6%) and 2-butanol (20%) , which was increased by 50 % and 70 % compared with using water as working fluid, and the total thermal resistence decreased from 0.31 oC/W to 0.22 oC/W. Due to the hydrophobicity of PTFE, water can’t be used on PTFE capillary structure. This study applied the self-rewetting fluids, which possess better wettability than water, on LHP with PTFE capillary structure. The results show that when the working fluid is 2-butanol (20%), the LHP system successfully work and the maximun heat load can reach 250W with total thermal resistence 0.54 oC/W, and the maximum heat flux is 12.9 W/cm2. Compared with results in other literatures, the maximum heat flux in this study is higher by 3 to 5 times other reference. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-15T13:43:55Z (GMT). No. of bitstreams: 1 ntu-104-R02522317-1.pdf: 2167483 bytes, checksum: 35071cfddb2e700baa443e05a186a241 (MD5) Previous issue date: 2015 | en |
| dc.description.tableofcontents | 學位論文口試委員會審定書 i
誌謝 iii 中文摘要 v Abstract vii 目錄 ix 圖目錄 xii 表目錄 xiv 符號說明 xv 第一章 緒論 1 1-1 前言 1 1-1.1 傳統熱管與迴路式熱管 1 1-1.2 金屬毛細結構與高分子毛細結構 4 1-1.3 馬蘭哥尼效應與自再潤濕流體 6 1-2 文獻回顧 7 1-3 研究目的 9 第二章 迴路式熱管的操作原理與限制 10 2-1 迴路式熱管的操作基本原理 10 2-2 迴路式熱管操作限制 12 2-2.1 毛細限制 12 2-2.2 啟動限制 12 2-2.3 液體過冷限制 13 2-2.4 補償室體積限制 14 2-3 迴路式熱管的熱阻分析 14 2-3.1 蒸發器熱阻 15 2-3.2 蒸汽段熱阻 16 2-3.3 冷凝器熱阻 16 第三章 實驗儀器設備與實驗方法 18 3-1 實驗材料與儀器設備 18 3-1.1 毛細結構材料 18 3-1.2 實驗藥品 19 3-1.3 量測表面張力之儀器設備 19 3-1.4 製造毛細結構之儀器設備 20 3-2 表面張力量測原理與方法 22 3-3 單孔徑毛細結構製作 24 3-4 單孔徑毛細內部參數量測 26 3-4.1 孔隙度 26 3-4.2 孔徑分布 27 3-4.3 滲透度 27 3-5 迴路式熱管的測試設備與性能評估 29 3-5.1 測試設備 29 3-5.2 安裝步驟 31 3-5.3 測試步驟 31 3-5.4 性能評估 32 3-6 誤差分析 33 3-7 迴路式熱管的系統參數 33 第四章 結果與討論 35 4-1 表面張力量測結果 35 4-2 自再潤濕流體應用於金屬迴路式熱管之結果 39 4-3 自再潤濕流體應用於高分子迴路式熱管之結果 43 第五章 結論與建議 48 參考文獻 50 附錄 54 附錄A 不準度分析 54 附錄B 熱電偶校正曲線 58 附錄C 實驗數據 61 | |
| dc.language.iso | zh-TW | |
| dc.subject | 熱傳性能 | zh_TW |
| dc.subject | 迴路式熱管 | zh_TW |
| dc.subject | 自再潤濕流體 | zh_TW |
| dc.subject | 表面張力 | zh_TW |
| dc.subject | 鐵氟龍 | zh_TW |
| dc.subject | Self-rewetting fluid | en |
| dc.subject | Heat transfer performance | en |
| dc.subject | Surface tension | en |
| dc.subject | Teflon (PTFE) | en |
| dc.subject | Loop heat pipe (LHP) | en |
| dc.title | 自再潤濕流體於金屬與高分子毛細結構迴路式熱管熱傳增強研究 | zh_TW |
| dc.title | Heat Transfer Enhancement of Loop Heat Pipe with Metal and Polymer Capillary Structure using Self-Rewetting Fluid | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 104-1 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 吳聖俊(Shen-Chun Wu),葉建志(Chien-Chih Yeh) | |
| dc.subject.keyword | 迴路式熱管,自再潤濕流體,表面張力,鐵氟龍,熱傳性能, | zh_TW |
| dc.subject.keyword | Loop heat pipe (LHP),Self-rewetting fluid,Teflon (PTFE),Surface tension,Heat transfer performance, | en |
| dc.relation.page | 62 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2015-12-15 | |
| 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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