教師資料查詢 | 類別: 會議論文 | 教師: 何啟東 Ho, Chii-dong (瀏覽個人網頁)

標題:質傳效率於迴流型二行程同心套管質量交換器之研究
學年92
學期1
發表日期2003/11/21
作品名稱質傳效率於迴流型二行程同心套管質量交換器之研究
作品名稱(其他語言)The Theoretical Study of Mass Transfer Efficiency in Double-Pass Concentric Circular Tubes with External Refluxes
著者何啟東; 何政霖; 涂志偉
作品所屬單位淡江大學化學工程與材料工程學系
出版者
會議名稱中國化學工程學會年會
會議地點台北, 台灣
摘要本研究是設計於圓形管加裝一可忽略厚度且可滲透之薄膜,使之成為一組固
定外壁濃度具有迴流裝置之圓柱同心套管質量交換器。此一質傳系統是屬於共軛
格拉茲問題(conjugated Graetz problem),利用分離變數法及正交展開方法
(orthogonal expansion technique)求出解析解及其濃度分佈與謝塢數,利用改變操
作與設計參數,探討迴流效應對雙套管間質傳效率提昇之影響,並與單行程無迴
流系統作比較。由結果顯示,本系統在薄膜位置偏離 1 及格拉茲數大時,其質傳
效率有明顯的提昇。此外,迴流比對於系統的影響則依迴流型式不同,而有不同
之影響。
A new device of double-pass mass exchanger is a circular tube with refluxes divided by inserting
a permeable barrier into two subchannels with uniform wall concentration, resulting in considerable
improvement of the device performance in mass transfer compared with that in an open conduit.
Efficiency improvement in mass transfer has been studied analytically by using an eigenfunction
expansion in power series. Analytical results show that suitable adjustment of the permeable-barrier
position can effectively enhance the mass transfer efficiency, leading to improved performance. The
effects of permeable-barrier position on mass transfer efficiency have been also delineated.
The analytical solutions to such a conjugated Graetz problem are obtained with
the use of separation variables, and the resulting eigenvalue problem is solved
associated with the orthogonality conditions. The present study also discusses the
improvement in mass transfer efficiency of such double-pass mass exchangers and the
influence of the permeable-barrier position on the device performance.
關鍵字質量傳送;共軛格拉茲問題;迴流效應;正交展開法;Orthogonal expansion technique;;Concentric circular tubes;External Refluxes;Conjugated Graetz problem;Mass transfer
語言中文
收錄於
會議性質國內
校內研討會地點
研討會時間20031121~20031121
通訊作者
國別中華民國
公開徵稿
出版型式
出處中國化學工程學會年會頁77
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