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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 侯文祥(Wen-Shang Hou) | |
dc.contributor.author | Kai-Chieh Lin | en |
dc.contributor.author | 林楷傑 | zh_TW |
dc.date.accessioned | 2021-06-17T06:33:28Z | - |
dc.date.available | 2020-08-19 | |
dc.date.copyright | 2018-08-19 | |
dc.date.issued | 2018 | |
dc.date.submitted | 2018-08-16 | |
dc.identifier.citation | 中文文獻
李冠霖(2010)。新型微氣泡產生器之開發與研究。碩士論文,國立台灣大學。 呂盈潔(2008)。簡易式微細氣泡柱運用於畜舍空氣除塵之可行性研究。碩士論文,國立台灣大學。 呂越,劉春,楊梟,吳克宏(2012)。 典型汙染物對微氣泡曝氣中氧傳質特性的影響。河北科技大學學報,第33卷,第5期。 葉曉娟(2006)。簡易式微細氣泡產生裝置規格化研發與應用研究。碩士論文,國立台灣大學。 陳同孝,張真誠,黃國峰(2001)。數位影像處理技術。松崗電腦圖書資料股份有限公司,台北市。 蔡宗霖(2004)。簡易微細氣泡產生裝置開發與應用在淡水與海水中曝氣與傳輸臭氧之研究。碩士論文,國立台灣大學。 蔣程瑤,趙淑梅,程燕飛,程彬,計博禹,山口智治(2013)。微/奈米氣泡水中的氧環境對葉菜種子發芽的影響。北方園藝,02,28~30。 蘇楊根(2004)。奈米微氣泡浮除技術於半導體工業化學機械研磨廢水處理之應用。 碩士論文,國立交通大學。 中央大學影像處理暨虛擬實境研究室(2018)。影像區塊分割。 http://ip.csie.ncu.edu.tw/course/IP/IP1409cp.pdf,檢索日期2018/6/15 英文文獻 Rahman, A., Ahmad, K. D., Mahmoud, A., Maoming, F. (2014). Nano-microbubble flotation of fine and ultrafine chalcopyrite particles. International Journal of Mining Science and Technology Volume 24, Issue 4, July 2014, Pages 559-566. Carey, V. P. (1992). Liquid-Vapor Phase-Change Phenomena an introduction to the thermophysics of vaporization and condensation processes in heat transfer equipment. Hemisphere Pub. Corp, Washington, D.C. Ferreira, T. and Rasband, W. (2012). ImageJ User Guide IJ 1.46r. Fujiwara, A., Okamoto, K., Hashiguchi, K., Peixinho, J., Takagi, S., Matsumoto, Y. (2007). BUBBLE BREAKUP PHENOMENA IN A VENTURI TUBE. Proceedings of FEDSM, ASME/JSME Fluids Engineering Division Summer Meeting, San Diego, California, USA. Gebhart, G.E., Summerfelt, R. C. (1976). Effects of Destratification on Depth Distribution of Fish. Journal of the Environmental Engineering Division, Vol.102, Issue 6, Pg.1215-1228. Gonzalez, R.C. and Woods R. E. (2008). Digital Image Processing Third Edition. Pearson Education, Inc.Upper Saddle River, New Jersey 07458. Gordiychuk, A., Svanera, M., Benini, S., Poesio, P. (2016). Size distribution and Sauter mean diameter of micro bubbles for a Venturi type bubble generator. Experimental Thermal and Fluid Science, 70, 51-60. Hasegawa, H., Nagasaka, Y., Kataoka, H. (2008). electrical potential of microbubble generated by shear flow in pipe with slits. Science Direct, Fluid Dynamics Research, 40, 554-564. Hirt, C. W. and Nichols B. D. (1981). Volume of Fluid (VOF) Method for the Dynamics of Free Boundaries. J. Comput. Phys., 39: 201-225. Li, J., Song, Y., Yin, J., Wang, D. (2017). Investigation on the effect of geometrical parameters on the performance of a venturi type bubble generator. ScienceDirect, Nuclear Engineering and Design 325, 90-96. Lawson, Thomas B. (1995). Fundamentals of Aquacultural Engineering. Chapman and Hall, New York. Ohnari, H. (2002). Swirling fine-bubble generator. United state patent, US6,382,601 B1 Otsu, N. (1979). A Tlreshold Selection Method from Gray-Level Histograms. IEEE TRANSACTIONS ON SYSTREMS, MAN, AND CYBERNETICS, VOL. SMC-9, NO. 1. Sadatomi, M., Kawahara, A., Kano, K., Ohtomo, A. (2005). Performance of a new micro-bubble generator with a spherical body in a flowing water tube. Experimental Thermal and Fluid Science 29, 615-623. Takahashi, M. (2005). ζ Potential of Microbubbles in Aqueous Solutions: Electrical Properties of the Gas-Water Interface. The Journal of Physical Chemistry B, Volume 109, Issue 46, Pages 21858-21864. Takahashi, M., Chiba, K., Pan, L. (2007). Free-Radical Generation from Collapsing Microbubbles in the Absence of a Dynamic stimulus. The Journal of Physical Chemistry B, Volume 111, Issue 6, Pages 1343-1347. Takahashi, M., Kawamura, T., Yamamoto, Y., Ohnari, H., Himuro, S., Shakutui. (2003). Effect of Shrinking Microbubble on Gas Hydrate Formation. The Journal of Physical Chemistry B, 107, 10, 2171-2173. Tao, D. (2005). Role of Bubble Size in Flotation of Coarse and Fine Particles—A Review. Separation Science and Technology, Vol.39(4):741-760. Zhou, L. F., Zhang, Q. (2005). Study on the effect of fine particle flotation when the bubble size changes. Nonferrous Metals (Mineral Processing), Vol.3:21-23. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/72288 | - |
dc.description.abstract | 微細氣泡具有良好的氣體溶解率與固體吸附率,目前水族缸市售沉水馬達大多附加氣泡管,使其在製造水流時提供增氧功能。本研究以低成本3D列印技術,自行設計適用於水族缸之文氏管型微細氣泡管,並與市售沉水馬達搭配之氣泡管比較。根據白努利定律(Bernoulli's Law),利用管路截面積差使液體流速增加,使外界氣體自動地被吸入管中,達到氣液混合目的。
本研究設定一微細氣泡管原型,並依據其加速區、束縮區、喉區、擴散區與擴散角度五個部位,更改管徑變化設計出共11組對照組,繪製草圖後以3D列印機製作成品。動力方面,挑選市售不同廠牌、流量一大一小之沉水馬達共2台,置於水缸內表底水層共2種水深,搭接自製氣泡管進行氣泡粒徑觀察及定量實驗。氣泡粒徑之定量使用影像處理法,將相機先以靜置法拍攝影像,再以軟體ImageJ將影像進行灰階化與二值化,計算在不同粒徑大小間之氣泡個數與粒度分佈,依據其結果選出有助於氣泡生成之幾何變化,組合出最佳之管徑配比後,再與市售沉水馬達搭配之氣泡管做比較。流體模擬則以軟體FLUENT進行模擬,分析原型管、最佳配比管與市售管在兩種水深共5種模組,探討不同幾何設計對管內流場的影響,將實驗與模擬結果相互對照。 依實驗結果,自製文氏管型微細氣泡管確實能增加微細氣泡生成之效果,本研究之自製最佳配比管幾何設計為:加速區長5mm、束縮區長10mm、喉區長7.5 mm、擴散區長15mm、擴散角度13度與束縮比值1/4。除了使用800L/H沉水馬達,放置水下5cm處,生成微細氣泡效果較差之外,自製最佳配比管均優於市售管,且隨著放置水深愈深效果愈明顯。使用1500L/H沉水馬達,放置水下15cm處時效果最好,在100~150μm數量差異最多,最佳配比管生成微細氣泡個數約為市售微細氣泡管之2.7倍,最佳配比管生成微細氣泡總個數約為市售微細氣泡管之2.5倍。幾何形狀影響粒度之差異性不大,除了最佳配比管於水下15cm處與市售管於水下12cm處之情況外,所有自製氣泡管與市售管之粒度分佈趨勢相似,且放置深度愈深,差異性愈小。而模擬結果可大致的呈現出與實驗相符之氣泡生成情形,但關於相似幾何設計之內流場探討,仍有許多模式與參數設定上之修正空間。 | zh_TW |
dc.description.abstract | Microbubbles have effective dissolution rate of gas and adsorption rate of solid. Most of the commercially available submersible motors using in aquarium are provided with bubble tubes, in order to increase dissolved oxygen while bringing the water flow. This study designs a venturi type microbubble tube for aquarium with the 3D printer which cost lower, and make a comparison with the bubble tubes matched with the commercially available submersible motors. According to Bernoulli's Law, the liquid velocity is increased because of the difference in section area of the pipeline, it makes the air automatically inhaled into the tube to achieve the mixing purpose.
In this study, setting up a prototype of the microbbuble tube which has 11 control groups by changing diameter of tubes, including acceleration portion, constriction portion, throat portion, divergence portion and the divergence angle. After sketching, products will be produced by 3D printer. For doing the experiment of observing and measuring bubble size, two sets of submersible motors are selected with different brands and flow rates, and placed them in two different water depths, and then installed the self-made bubble tube on the motor. Image processing method are used for quantification of bubble size. The images are captured with camera by static method, and they are grayscaled and binarized with software ImageJ to calculate the number and the size distribution of bubbles among different size. Selecting some geometric changes which helps bubble formed and make the best diameter ratio combination. Then, comparing the best-proportioning tube with bubble tubes matched with the commercially available submersible motors. The fluid simulation is simulated with software FLUENT. Analyzing the prototype tube, the best-proportioning tube and the commercially available tube in two water depths, a total count of 5 cases. Discussing the effects of different geometric designs on the flow field inside the tubes. Finally, the experiment and simulation results are compared with each other. According to the experimental results, the self-made venturi type microbubble tube can increase the number of microbubble. The best geometric design of the bubble tube in this study is: acceleration portion 5mm, constriction portion 10mm, throat portion 7.5mm, divergence portion 15mm, divergence angle 13 degrees, and ratio of constriction 1/4. The result of the bubble generation using the best-proportioning tube is better than commercially available tube, and the difference is lager as the depth of the water goes deeper, except for using 800L/H submersible motor and placing at 5cm underwater. The best result is obtained when using 1500L/H submersible motor and placing underwater at 15 cm. There is considerable difference in the range of 100 to 150μm, which the number of microbubbles generated by the best-proportioning tube is about 2.7 times the number generated by the commercially available tube. The total the number of microbubbles generated by the best-proportioning tube is about 2.5 times the number generated by the commercially available tube. Geometric designs hardly affect the size distribution. Except for the best-proportioning tube at 15cm underwater and the commercially available tube at 12cm underwater, all the self-made and commercially available tubes have similar tendency of size distribution, furthermore, the difference between two of them goes not obvious as water depth goes deeper. The results of simulation roughly showed the situation of the bubble generation, which is consistent with the experiment. However, there are still room for improvement about settings of model and parameter. | en |
dc.description.provenance | Made available in DSpace on 2021-06-17T06:33:28Z (GMT). No. of bitstreams: 1 ntu-107-R05622022-1.pdf: 6506954 bytes, checksum: 117d1dff22876ce71515b88d94d391df (MD5) Previous issue date: 2018 | en |
dc.description.tableofcontents | 摘要 i
ABSTRACT ii 目錄 iv 圖目錄 vi 表目錄 ix 第一章、前言 1 1.1 研究背景 1 1.2 研究動機 2 1.3 研究目的 3 第 二 章、文獻回顧 4 2.1 微細氣泡基本特性 4 2.1.1 水中上升速度緩慢 4 2.1.2 氣體溶解度佳 4 2.1.3 表面帶有負電荷 5 2.2 微細氣泡之應用 6 2.2.1 增氧效率 6 2.2.2 泡沫浮除 6 2.3 微細氣泡管設計原理 8 2.4 影像處理基礎 11 2.4.1 影像分類 11 2.4.2 影像分析原理 12 第 三 章、實驗材料與研究方法 13 3.1 實驗流程 13 3.2 實驗配置 15 3.2.1 實驗場設置 15 3.2.2 沉水馬達選擇及配置實驗水深 16 3.3 微細氣泡管設計與製作 18 3.3.1 草圖設計 18 3.3.2 製作方式 20 3.4 氣泡粒徑定量實驗 22 3.4.1 靜置法拍攝影像 22 3.4.2 影像處理流程 24 3.4.3 計算氣泡粒徑與粒度分佈 27 3.4.4 資料分析 28 3.5 FLUENT分析管內流場 29 3.5.1 VOF模型 29 3.5.2 參數設定 29 3.5.3 資料分析 29 第 四 章、結果與討論 30 4.1 微細氣泡管幾何設計對生成氣泡之影響 30 4.1.1 用流量1500L/H沉水馬達 30 4.1.2 使用流量800L/H沉水馬達 36 4.2 微細氣泡管幾何設計對管內流場之影響 42 4.2.1 自製原型管與最佳配比管之內流場差異 42 4.2.2 自製最佳配比管與市售管之內流場差異 44 4.2.3 沉水馬達加速區長度對內流場之影響 46 第 五 章、結論與建議 48 5.1 結論 48 5.2 建議 49 參考文獻 50 附錄 53 附表一 使用流量1500L/H, 水下5cm處氣泡粒徑與粒度分佈 53 附表二 使用流量1500L/H, 水下15cm處氣泡粒徑與粒度分佈 54 附表三 使用流量800L/H, 水下5cm處氣泡粒徑與粒度分佈 55 附表四 使用流量800L/H, 水下12cm處氣泡粒徑與粒度分佈 56 | |
dc.language.iso | zh-TW | |
dc.title | 低動力微細氣泡裝置研發之研究 | zh_TW |
dc.title | Research and Development of Low-Power Microbubble Generator | en |
dc.type | Thesis | |
dc.date.schoolyear | 106-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 胡明哲(Ming-Che Hu),喻新(Hsin Yu) | |
dc.subject.keyword | 微細氣泡,文氏管,泡沫浮除,影像處理法,粒度分佈, | zh_TW |
dc.subject.keyword | microbubble,venturi tube,flotation,image processing method,size distribution, | en |
dc.relation.page | 56 | |
dc.identifier.doi | 10.6342/NTU201803769 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2018-08-16 | |
dc.contributor.author-college | 生物資源暨農學院 | zh_TW |
dc.contributor.author-dept | 生物環境系統工程學研究所 | zh_TW |
顯示於系所單位: | 生物環境系統工程學系 |
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