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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/54629
標題: | 水平式攪水機設備效率研究 Study on the Efficiency of Horizontal Type's Aeration Equipment |
作者: | Wai-Zhian Soo 蘇偉建 |
指導教授: | 侯文祥(Wen-Shang Hou) |
關鍵字: | 曝氣機,氧氣質傳,養殖池,溶氧,流場, Aerator,Oxygen-transfer,Culture Pond,Dissolved Oxygen,Flow Field, |
出版年 : | 2020 |
學位: | 碩士 |
摘要: | 水產養殖的過程中,養殖池易受到外在因素影響水質,造成水質品質不穩定現象。為了避免養殖池水質品質不佳狀況,確保氧氣供應充足與分佈均勻,會設置各種曝氣設備在養殖池內。在台灣的曝氣設備以垂直攪水式之葉輪水車為主,亦有其他種類之曝氣設備,然而這些不同類種之曝氣設備有不同的產生效果,對此相關研究也多著重於葉輪式水車。 本研究探討兩種水平式攪水機耘水機及湧浪機,在台大醉月湖進行實驗,以流速與溶氧垂直分布與小型分布實測作為重點。另外,本研究利用3D列印機製作出水平式攪水機之縮小模型在水族缸內進行研究,僅測攪水範圍以及增氧效率之數據,進而了解流場分布與增氧效果,並與文獻之垂直式攪水設備效率作比較,以了解不同規格之曝氣設備對於養殖池的水體各分層間之影響。 結果顯示,耘水機設備在增氧效率方面較佳,且水體循環效果範圍亦佳。其標準氧氣轉換效率(SOTR)與標準曝氣效率(SAE)數據分別為2.50×10-5 kgO2/hr及0.02 kgO2/kw/hr,因設備縮小20倍之標準試驗結果,並無文獻可作比較。染料試驗部分,水體循環之顯示染料由葉扇從上方打散至池壁沉入水底再經由設備中心吸上至葉扇再打散至池壁之重複流況。 In the process of aquaculture, the water quality of aquaculture ponds is easily affected by external factors, resulting in the instability of water quality. In order to avoid the poor water quality of the culture pond and ensure adequate oxygen supply and even distribution, various types of aeration equipment are installed in the culture pond. There are various kinds of aeration equipment, but the one mainly used in Taiwan is the vertical impeller type waterwheel. These different kinds of aeration equipment have different effects, and the similar studies focus more on the waterwheel’s impeller. In this study, two kinds of horizontal Leaf Fan Form and Wave Maker generator were studied. The experiment was carried out in a field pond. This research focuses on the measurements of flow rate and dissolved oxygen and small distribution. Furthermore, the study also used 3D printing technology to make smaller models of a horizontal mixing water machine and observe their effects in aquariums. The range of stirring water and the efficiency of oxygen enrichment were measured to understand the flow field distribution and the effect of aeration on the improvement of water quality and environment. Moreover, they were also measured to compare the efficiency of vertical mixing equipment in literature, and to understand the effect of different specifications of aeration equipment on different layers of water in the aquaculture pond. The results show that the efficiency of the Leaf Fan Form is better, and the range of water circulation is also better. The SOTR and SAE data were 2.50×10-5 kgO2/ hr and 0.02 kgO2/kw/hr, respectively. Since the size of the aeration equipment was reduced by 20 times, there is no literature available for comparison. In the dye test part, the water circulation shows the repeated flow in which the dye is dispersed from the leaf fan above to the wall and sinks to the bottom, and then sucked up through the center of the equipment to the fan and then dispersed to the wall. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/54629 |
DOI: | 10.6342/NTU202002239 |
全文授權: | 有償授權 |
顯示於系所單位: | 漁業科學研究所 |
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U0001-0308202001024200.pdf 目前未授權公開取用 | 3.98 MB | Adobe PDF |
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