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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/87889

    Title: 真空式與直接接觸式薄膜蒸餾於海水淡化之性能比較
    Other Titles: Comparison on the performances of VMD and DCMD in desalination
    Authors: 葉國麟;Yeh, Kuo-Lin
    Contributors: 淡江大學化學工程與材料工程學系碩士班
    鄭東文;Cheng, Tung-Wen
    Keywords: 真空式薄膜蒸餾;直接接觸式薄膜蒸餾;聚四氟乙烯;流動通道;Vacuum membrane disstillation;Direct contact membrane distillation;Channel;PTFE
    Date: 2012
    Issue Date: 2013-04-13 11:50:29 (UTC+8)
    Abstract: 本研究實驗是利用Toyo公司所生產之聚四氟乙烯(Polytetrafluoroethylene;pore size=0.2μm)比較直接接觸式薄膜蒸餾(Direct Content Membrane Distillation)與真空式薄膜蒸餾(Vacuum Membrane Distillation)兩者系統用於海水淡化時之效能。實驗是以原型模組與改良模組(凸出型)改變進料溫度、進料流量、曝氣,比較兩系統其滲透通量之差異與影響。
    The flat PTFE membrane and hollow fiber PVDF membrane were used in studying on the flux performance in the operating of DCMD and VMD. Operating parameters included temperature difference, feed flow rate, module inclination angle, gas flow rate. The convex design in the feed chance was also included.
    The experimental results show that increasing the temperature difference will increase the permeate flux, but also heighten the polarization phenomena. The performance of Increasing feed flow in DCMD system higher than VMD system. In DCMD system, the permeate flux increased, and reached a maximum at about 45°. Aeration in DCMD system can enhance the flux, but VMD in the angle greater than 45o aeration will be effective. It is noted that the convex design in the feed channel as module inclined increases the shear stress on the membrane, thus, effectively reduces the polarization phenomena and increases the permeate flux. The flux enhancement in DCMD and VMD were improved to about 37.3% and 15.8% percent.
    Appears in Collections:[化學工程與材料工程學系暨研究所] 學位論文

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