淡江大學機構典藏:Item 987654321/87896
English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 62830/95882 (66%)
造訪人次 : 4062322      線上人數 : 431
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧：
  • 您可在西文檢索詞彙前後加上"雙引號"，以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋，建議至進階搜尋限定作者欄位，可獲得較完整資料
    •  進階搜尋


    請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/87896


    題名: 真空式與直接接觸式薄膜蒸餾於海水淡化之滲透通量模擬
    其他題名: Modeling on the distillate fluxes of DCMD and VMD in desalination
    作者: 廖子霈;Liao, Tzu-Pei
    貢獻者: 淡江大學化學工程與材料工程學系碩士班
    鄭東文;Cheng, Tung-Wen
    關鍵詞: 薄膜蒸餾;海水淡化;真空式;模擬;Direct contact membrane distillation;vacuum;Polarization phenomena;Modeling
    日期: 2012
    上傳時間: 2013-04-13 11:50:49 (UTC+8)
    摘要: 本研究之目的為模擬計算直接接觸式薄膜蒸餾與真空式薄膜蒸餾於海水淡化之滲透通量，並比較其性能差異，透過改變不同的操作參數(進料流量、溫度、濃度)來探討各參數對於濾速之影響，以此做進一步討論最適化操作下之操作條件。
    結果顯示本研究結合各項海水物性變數並由Dusty-Gas model模擬之滲透通量相當吻合實驗值。溫度極化效應對MD系統影響甚鉅，而VMD系統雖然其極化現象較易獲得改善而有效提高滲透通量，但在VMD系統會因滲透通量的上升而增加其操作成本。成本評估成果顯示，DCMD系統比VMD系統較適合達到經濟規模的設置。
    在DCMD，增大物料流率可降低溫度極化及濃度極化現象，其中增大進料側流率會提高熱使用效率，但濾液側流率增大會因透膜熱傳導量增加而降低熱使用效率。
    The objectives of this study included the flux estimation of DCMD and VMD in seawater desalination and their comparisons, and aimed to investigate the optimal operating conditions for seawater desalination. The operating parameters in the simulation included the feed flow rate, temperature and concentration.
    The simulation results based on considering the combination of Dusty-Gas model with the seawater properties agree very well with the experimental data. The results also show that the temperature polarization has a significant influence on the flux. The polarization phenomena in the VMD system can be easier improved to increase the distillate flux. However, the operating cost of VMD increases with the increase of distillate flux. The cost evaluation shows that the DCMD system is more economic than the VMD system.
    Both the temperature and concentration phenomena can be reduced by increasing the flow rates in the DCMD system. It is noted that increasing the feed side flow rate also enhances the thermal efficiency, while increasing the flow rate in distillate side will raise the heat conduction through the membrane and result in lowering the thermal efficiency.
    顯示於類別:[化學工程與材料工程學系暨研究所] 學位論文

    文件中的檔案:

    檔案 大小格式瀏覽次數
    index.html0KbHTML307檢視/開啟

    在機構典藏中所有的資料項目都受到原著作權保護.

    TAIR相關文章

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