English  |  正體中文  |  简体中文  |  Items with full text/Total items : 62819/95882 (66%)
Visitors : 4010223      Online Users : 1011
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/74525

    Title: 直接接觸式薄膜蒸餾於中空纖維模組之模擬與實驗分析
    Other Titles: Modeling and experimental analysis of direct contact membrane distillation in hollow-fiber modules
    Authors: 楊子瑾;Yang, Tzu-Jing
    Contributors: 淡江大學化學工程與材料工程學系碩士班
    何啟東;Ho, Chii-dong
    Keywords: 直接接觸式薄膜蒸餾;中空纖維模組;解析解;Direct contact membrane distillation;Hollow fiber membrane module;Analytical solution
    Date: 2011
    Issue Date: 2011-12-28 18:49:30 (UTC+8)
    Abstract: 薄膜蒸餾(membrane distillation, MD)為近來廣受重視的一種技術,其特色為具有裝置簡潔、低成本、可模組化、高介面面積等多方面之優勢,直接接觸式薄膜蒸餾原理乃是利用薄膜兩側的飽和蒸汽壓差為驅動力促使水蒸氣通過薄膜,進而達到分離的效果。
    Membrane distillation is a feasible technology for desalination by utilizing the vapor pressure difference across a hydrophobic membrane via temperature driving force. Potential advantages of membrane distillation over traditional evaporation processes including (1) it is easy to scale-up, (2) possibility of using modules in series, (3) modularity, (4) high level of interface area and low investment, etc.
    The analytical solutions for such conjugated Graetz problems in direct contact membrane distillation systems (DCMD) were obtained by using the separated variable method with an orthogonal expansion technique extended in power series. The effects of operation parameters in three membrane distillation systems, include flat-plate module, circular-tube module and hollow fiber module
    are investigated theoretically, this theoretical predictions were represented graphically with the Graetz number (volumetric flow rate), flow pattern and hot feed inlet temperature as parameters, besides, the temperature profiles and average Nusselt numbers has been examined and reported.
    The analytical results reveal that the initial saline temperature effect in the hot feed stream on the pure water productivity is more significant than hot and cold feed stream flow rate variations. However, a higher flow rate of hot or cold feed stream still has positive effects on producing better pure water productivity in the case when the inlet saline temperature is specified. The experiments in hollow fiber module were carried out in this study to confirm the accuracy of the theoretical results, and the mathematical model derived in the present study can also be applied to other membrane distillation process to estimate the pure water productivity.
    Appears in Collections:[Graduate Institute & Department of Chemical and Materials Engineering] Thesis

    Files in This Item:

    File SizeFormat

    All items in 機構典藏 are protected by copyright, with all rights reserved.

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - Feedback