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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 黃振康 | zh_TW |
dc.contributor.advisor | Chen-Kang Huang | en |
dc.contributor.author | 周劭穎 | zh_TW |
dc.contributor.author | Shao-Ying Chou | en |
dc.date.accessioned | 2023-08-16T16:52:08Z | - |
dc.date.available | 2023-11-09 | - |
dc.date.copyright | 2023-08-16 | - |
dc.date.issued | 2023 | - |
dc.date.submitted | 2023-08-10 | - |
dc.identifier.citation | 李宗翰。多孔性加熱表面對沸騰熱傳之影響。碩士論文,國立臺北科技大學機電整合研究所,2008。https://hdl.handle.net/11296/sehybv。
陳文安。氧化鎢奈米線及二氧化鈦奈米管於沸騰熱傳之影響。碩士論文,國立臺灣大學生物產業機電工程學研究所,2019。https://hdl.handle.net/11296/e9rsu6。 Bergman, T.L., T.L. Bergman, F.P. Incropera, D.P. Dewitt, and A.S. Lavine, Fundamentals of heat and mass transfer. 2011: John Wiley & Sons. Carey, V.P., Liquid-Vapor Phase-Change Phenomena: An Introduction to the Thermophysics of Vaporization and Condensation Processes in Heat Transfer Equipment. 2020: CRC Press. Das, S., B. Saha, and S. Bhaumik. 2017. Experimental study of nucleate pool boiling heat transfer of water by surface functionalization with crystalline TiO2 nanostructure. Applied Thermal Engineering. 113: 1345-1357. Das, S., B. Saha, and S. Bhaumik. 2017. Experimental study of nucleate pool boiling heat transfer of water by surface functionalization with SiO 2 nanostructure. Experimental Thermal and Fluid Science. 81: 454-465. Dong, L., X. Quan, and P. Cheng. 2014. An experimental investigation of enhanced pool boiling heat transfer from surfaces with micro/nano-structures. International Journal of Heat and Mass Transfer. 71: 189-196. Hsu, Y. 1962. On the size range of active nucleation cavities on a heating surface. Jun, S., H. Wi, A. Gurung, M. Amaya, and S.M. You. 2016. Pool Boiling Heat Transfer Enhancement of Water Using Brazed Copper Microporous Coatings. Journal of Heat Transfer. 138(7). Kandlikar, S.G. 2001. A Theoretical Model to Predict Pool Boiling CHF Incorporating Effects of Contact Angle and Orientation. Journal of Heat Transfer. 123(6): 1071-1079. Kim, D.E., D.I. Yu, D.W. Jerng, M.H. Kim, and H.S. Ahn. 2015. Review of boiling heat transfer enhancement on micro/nanostructured surfaces. Experimental Thermal and Fluid Science. 66: 173-196. Kong, X., Y. Zhang, and J. Wei. 2018. Experimental study of pool boiling heat transfer on novel bistructured surfaces based on micro-pin-finned structure. Experimental Thermal and Fluid Science. 91: 9-19. Kousalya, A.S., J.A. Weibel, S.V. Garimella, and T.S. Fisher. 2013. Metal functionalization of carbon nanotubes for enhanced sintered powder wicks. International Journal of Heat and Mass Transfer. 59: 372-383. Kumar G, U., S. S, T. M.R, and D. Babu P. 2017. Effect of diameter of metal nanowires on pool boiling heat transfer with FC-72. Applied Surface Science. 423: 509-520. Liang, G. and I. Mudawar. 2018. Pool boiling critical heat flux (CHF)–Part 2: Assessment of models and correlations. International Journal of Heat and Mass Transfer. 117: 1368-1383. Liang, G. and I. Mudawar. 2019. Review of pool boiling enhancement by surface modification. International Journal of Heat and Mass Transfer. 128: 892-933. Lienhard, J. and V. Dhir. 1973. Hydrodynamic prediction of peak pool-boiling heat fluxes from finite bodies. Lu, M.-C., R. Chen, V. Srinivasan, V.P. Carey, and A. Majumdar. 2011. Critical heat flux of pool boiling on Si nanowire array-coated surfaces. International Journal of Heat and Mass Transfer. 54(25-26): 5359-5367. Malakhov, I., A. Seredkin, A. Chernyavskiy, V. Serdyukov, R. Mullyadzanov, and A. Surtaev. 2023. Deep learning segmentation to analyze bubble dynamics and heat transfer during boiling at various pressures. International Journal of Multiphase Flow. 162. Mohamed, S.H. and K.M. Al-Mokhtar. 2018. Characterization of Cu2O/CuO nanowire arrays synthesized by thermal method at various temperatures. Applied Physics A. 124(7). Mori, S. and Y. Utaka. 2017. Critical heat flux enhancement by surface modification in a saturated pool boiling: A review. International Journal of Heat and Mass Transfer. 108: 2534-2557. Može, M. 2020. Effect of boiling-induced aging on pool boiling heat transfer performance of untreated and laser-textured copper surfaces. Applied Thermal Engineering. 181. Nirgude, V.V. and S.K. Sahu. 2020. Heat transfer enhancement in nucleate pool boiling using laser processed surfaces: Effect of laser wavelength and power variation. Thermochimica Acta. 694. Rahman, M.M., E. Olceroglu, and M. McCarthy. 2014. Role of wickability on the critical heat flux of structured superhydrophilic surfaces. Langmuir. 30(37): 11225-34. Rokoni, A., L. Zhang, T. Soori, H. Hu, T. Wu, and Y. Sun. 2022. Learning new physical descriptors from reduced-order analysis of bubble dynamics in boiling heat transfer. International Journal of Heat and Mass Transfer. 186. Serdyukov, V., S. Starinskiy, I. Malakhov, A. Safonov, and A. Surtaev. 2021. Laser texturing of silicon surface to enhance nucleate pool boiling heat transfer. Applied Thermal Engineering. 194. Surtaev, A.S. and V.S. Serdyukov. 2018. Investigation of contact line dynamics under a vapor bubble at boiling on the transparent heater. Thermophysics and Aeromechanics. 25(1): 67-73. Ujereh, S., T. Fisher, and I. Mudawar. 2007. Effects of carbon nanotube arrays on nucleate pool boiling. International Journal of Heat and Mass Transfer. 50(19-20): 4023-4038. Wang, Z., Y. Lei, K. Chen, Q. Li, Y. Yin, and R. Fan. 2021. Effect of Oxidation Treatment on Microstructure and Electrochemical Properties of 6061 Aluminum Alloy. International Journal of Electrochemical Science. 16(2). Zuber, N., Hydrodynamic aspects of boiling heat transfer. 1959: United States Atomic Energy Commission, Technical Information Service. | - |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/89037 | - |
dc.description.abstract | 近年來,隨著5G、機器學習和區塊鏈等技術快速發展,數據中心在有限的空間下對運算能力的要求越發嚴苛,使得所需之熱設計功耗大幅提升,導致大量的熱無法被有效的散去。因此,引入具有更高對流熱傳係數的兩相浸沒式冷卻技術被視為是一種具有前景的先進散熱策略。
本研究設計了四種雷射表面紋理化 (Laser Surface Texturing, LST) 的路徑分別為線狀、交叉線狀、孔洞I與孔洞II,用於純銅與鋁6061兩種金屬進行表面改質,並將純銅雷射改質進一步做熱氧化 (TO),進行池沸騰實驗。另外,高速攝影機蒐集得到的汽泡影像用以訓練神經網路模型Mask R-NN以進行汽泡分析。 應用LST技術之雷射加工結果顯示,交叉線狀路徑LST技術應用表面改質,若雷射能量充足,會在交點處會形成規則緻密的孔洞。孔洞I及孔洞II路徑則會在接近圓心處因為雷射光斑的重疊而產生深入的孔洞。 池沸騰實驗結果顯示,線狀路徑於純銅的表面改質,核沸騰起始點降低了4.2 ℃,對流熱傳係數為原本之112 %;於鋁6061的表面改質,核沸騰起始點無顯著變化,而對流熱傳係數為原本之149 %。交叉線狀路徑於純銅的表面改質,核沸騰起始點降低了4.3 ℃,對流熱傳係數為原本之161 %;於鋁6061的表面改質,核沸騰起始點降低了6.8 ℃,對流熱傳係數為原本之158 %。孔洞I路徑於純銅的表面改質,核沸騰起始點降低了4.8 ℃,對流熱傳係數為原本之124 %;於鋁6061的表面改質,核沸騰起始點降低了6.0 ℃,對流熱傳係數為原本之111 %。孔洞II路徑於純銅的表面改質,核沸騰起始點降低了3.2 ℃,對流熱傳係數為原本之158 %;於鋁6061的表面改質,核沸騰起始點降低了6.1 ℃,對流熱傳係數為原本之130 %。對四種不同雷射路徑於純銅的表面改質進一步做熱氧化 (TO) 長出奈米線結構進行沸騰實驗後發現,對流熱傳係數相比沒做TO都有所下降,這是由於奈米線的斷裂導致與方向不一致導致汽泡纏結,從而降低對流熱傳係數。另外,Mask R-CNN模型成功讀取汽泡影像並對汽泡個數進行量化。在低熱通量時,可以用來判斷成核點的多寡;當汽泡數大幅下降時,可以用來判斷汽泡劇烈合併時的熱通量。 | zh_TW |
dc.description.abstract | In recent years, with the rapid development of technologies such as 5G, machine learning, and blockchain, the demand for computational power in data centers has become increasingly stringent within limited space. Therefore, the introduction of two-phase immersion cooling, which offers a higher convective heat transfer coefficient, is regarded as a highly promising advanced thermal management strategy.
This study designs four laser surface texturing (LST) patterns, including line-like, crosshatch-like, hole I, and hole II, for surface modification of pure copper and aluminum 6061. Furthermore, the laser-modified pure copper samples are subjected to thermal oxidation (TO) treatment for pool boiling experiments. High-speed camera images of the boiling bubbles are collected and used to train a neural network model, Mask R-NN, for bubble analysis. The results of laser processing using LST technique demonstrate that the crosshatch-like pattern can effectively modify the surface, forming regularly spaced and dense holes at the intersection points when sufficient laser energy is applied. On the other hand, the hole I and hole II patterns result in deeper holes near the center due to the overlapping of laser spots. The results of the pool boiling experiments showed that for the surface modification of pure copper using the line-like pattern, the onset of nucleate boiling point was reduced by 4.2 °C, and the convective heat transfer coefficient increased to 112 % compared to the smooth surface. On the other hand, for the surface modification of aluminum 6061 using the line-like pattern, there was no significant change in the onset of nucleate boiling point, but the convective heat transfer coefficient increased to 149 % compared to the smooth surface. For the surface modification of pure copper using the crosshatch-like pattern, the onset of nucleate boiling point was reduced by 4.3 °C, and the convective heat transfer coefficient increased to 161 % compared to the smooth surface. Similarly, for the surface modification of aluminum 6061 using the crosshatch-like pattern, the onset of nucleate boiling point was reduced by 6.8 °C, and the convective heat transfer coefficient increased to 158 % compared to the smooth surface. For the surface modification of pure copper using the hole I pattern, the onset of nucleate boiling point was reduced by 4.8 °C, and the convective heat transfer coefficient increased to 124 % compared to the smooth surface. Likewise, for the surface modification of aluminum 6061 using the hole I pattern, the onset of nucleate boiling point was reduced by 6.0 °C, and the convective heat transfer coefficient increased to 111 % compared to the smooth surface. For the surface modification of pure copper using the hole II pattern, the onset of nucleate boiling point was reduced by 3.2 °C, and the convective heat transfer coefficient increased to 158 % compared to the smooth surface. Similarly, for the surface modification of aluminum 6061 using the hole II pattern, the onset of nucleate boiling point was reduced by 6.1 °C, and the convective heat transfer coefficient increased to 130 % compared to the smooth surface. Furthermore, after further thermal oxidation (TO) treatment to grow nanowire structures on the surface modifications of the four different laser patterns on pure copper, it was found that the convective heat transfer coefficient decreased compared to the case without TO treatment, which may be due to the inconsistent directions caused by the fracture of the nanowires. Additionally, the Mask R-CNN model successfully read the bubble images and quantified the number of bubbles. It can be used to assess the abundance of nucleation sites at low heat fluxes and to determine the heat flux during intense bubble coalescence when the number of bubbles decreases significantly. | en |
dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2023-08-16T16:52:08Z No. of bitstreams: 0 | en |
dc.description.provenance | Made available in DSpace on 2023-08-16T16:52:08Z (GMT). No. of bitstreams: 0 | en |
dc.description.tableofcontents | 摘要 i
Abstract iii 圖目錄 viii 表目錄 xiii 第一章 緒論 1 1.1 前言 1 1.2 沸騰曲線 2 1.3 池沸騰的參數影響 5 1.4 雷射加工技術 6 1-5 研究動機 8 1-6 研究目的 8 第二章 文獻探討 9 2.1 微奈米結構 9 2.1.1 核沸騰起始點 11 2.1.1 接觸角 11 2.1.2 微結構 12 2.1.3 奈米結構 14 2.1.4 混合結構 20 2.1.5 沸騰汽泡表現 22 2.2 雷射加工 24 2.3 汽泡影像分析 29 第三章 實驗方法 34 3.1 池沸騰實驗 34 3.1.1 沸騰試片 34 3.1.2 實驗裝置 36 3.1.3 實驗流程 38 3.1.4 沸騰曲線 38 3.1.5 熱電耦測量不確定性分析 40 3.2 雷射加工 41 3.2.1 線狀 (Line-like) 路徑 42 3.2.2 交叉線狀 (Crosshatch-like) 路徑 43 3.2.3 孔洞I (hole I) 44 3.2.4 孔洞II (hole II) 45 3.3 表面量測 46 3.3.1 接觸角量測 46 3.3.1 顯微鏡 46 3.4 汽泡影像分析 47 3.4.1 汽泡影像前處理 47 3.4.2 Mask R-CNN 48 第四章 結果與討論 49 4.1 線狀 (Line-like) 路徑之影響 49 4.1.1 線狀路徑於純銅表面探討 49 4.1.2 線狀路徑於鋁6061表面探討 53 4.2交叉線狀 (Crosshatch-like) 路徑之影響 57 4.2.1 交叉線狀路徑於純銅表面探討 57 4.2.2 交叉線狀路徑於鋁6061表面探討 60 4.3孔洞I及孔洞II (hole I & hole II ) 路徑之影響 63 4.3.1 孔洞I及孔洞II於純銅表面探討 63 4.3.2 孔洞I及孔洞II於鋁6061表面探討 69 4.4平滑與雷射加工純銅表面TO之影響 74 4.5 潤濕性 (Wettability) 77 4.6 溫度校正 80 4.7 Mask R-CNN 81 4.7.1 模型分析 81 4.7.2 汽泡計數 83 4.8 雷射路徑於沸騰熱傳之影響 85 4.8.1 線狀路徑於沸騰熱傳之影響 87 4.8.2 交叉線狀路徑於沸騰熱傳之影響 88 4.8.3 孔洞I路徑於沸騰熱傳之影響 88 4.8.4 孔洞II路徑於沸騰熱傳之影響 89 4.9 雷射路徑加上熱氧化於純銅表面之影響 90 4.10 雷射路徑之加工時間 91 第五章 結論與建議 92 5.1 結論 92 5.2 建議 93 第六章 參考文獻 94 | - |
dc.language.iso | zh_TW | - |
dc.title | 雷射表面改質與應用Mask R-CNN於沸騰熱傳之影響 | zh_TW |
dc.title | Effects of Laser Surface Modification and Application of Mask R-CNN on Boiling Heat Transfer | en |
dc.type | Thesis | - |
dc.date.schoolyear | 111-2 | - |
dc.description.degree | 碩士 | - |
dc.contributor.oralexamcommittee | 蘇程裕;李貫銘 | zh_TW |
dc.contributor.oralexamcommittee | Cherng-Yuh Su;Kuan-Ming Li | en |
dc.subject.keyword | 池沸騰,表面改質,雷射紋理化,氧化銅奈米線,Mask R-CNN, | zh_TW |
dc.subject.keyword | Pool Boiling,Surface Modification,Laser Surface Texturing,Cu2O/ CuO nanowires,Mask R-CNN, | en |
dc.relation.page | 96 | - |
dc.identifier.doi | 10.6342/NTU202303401 | - |
dc.rights.note | 同意授權(限校園內公開) | - |
dc.date.accepted | 2023-08-10 | - |
dc.contributor.author-college | 生物資源暨農學院 | - |
dc.contributor.author-dept | 生物機電工程學系 | - |
顯示於系所單位: | 生物機電工程學系 |
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