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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/105675

    Title: 非絕熱膜蒸餾塔之模擬與設計
    Other Titles: Simulation and design of diabatic membrane-based distillation columns
    Authors: 林姿吟;Lin, Tzu-Yin
    Contributors: 淡江大學化學工程與材料工程學系碩士班
    Keywords: 非絕熱;中空纖維;蒸餾塔;可用能損失;熵增量;diabatic;Hollow fiber;distillation;exergy;entropy production
    Date: 2015
    Issue Date: 2016-01-22 15:02:19 (UTC+8)
    Abstract: 本論文以模擬方式探討使用中空纖維模組之絕熱與非絕熱蒸餾塔。本研究利用在Aspen Custom Modeler®(ACM)平台上建立之嚴謹數學模式完成了塔內特性與性能分析,以及熱質傳阻力、操作條件與薄膜參數之影響分析,並且完成非絕熱塔之最佳化分析。本論文探討之模組為陶瓷膜膜組,物質系統為苯-甲苯混合物。
    This thesis investigates the performance of adiabatic and diabatic hollow fiber membrane distillation columns using a rigorous mathematical model built on the Aspen Custom Modeler®(ACM) platform. The separation performance and effects of heat and mass transfer resistance, operating conditions and device variables are analyzed. For the diabatic distillation columns, the internal heat exchange is optimized. The distillation column studied employs a ceramic hollow fiber membrane and the mixture system studied is benzene-toluene.
    For the base case, the major resistances are contributed by vapor side heat transfer and membrane mass transfer. The key parameters affecting product purity are boilup ratio, reflux ratio and membrane tortuosity.The heat duty and specific exergy loss are mostly affected by the boilup ratio and by the boilup ratio and reflux ratio, respectively.
    For the optimization of diabatic column, a two-level optimization approach is proposed. The inner layer optimize the feed location and the heat exchange rates of rectifying and stripping sections. The outer layer optimize the feed flowrate and composition as well as the heat exchange area. The outer layer study employs experimental design and response surface method. Three heat exchange distribution principles, including equal of heat exchange rate (EoQ), equal of entropy production (EoEP) and linear heat exchange rate (LQ), were adopted in the optimization analysis. Under the same operation conditions, the specific exergy loss of LQ column is the lowest and is reduced by 26.9% compared to adiabatic column. The NTU (number of transfer unit) of EoEP column is the highest and is increased by 25.28% compared to the adiabatic column. This study also presents the results of the evolutionary optimization, which continuously moves certain portion of the heat exchange rate from the location of the highest exergy loss to the location of the lowest exergy loss. The performance of optimal evolutionary column is close to that of the EoQ column with the NTU and the specific exergy loss increased by 7.8% and decreased by 4.9% compared to adiabatic column.
    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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