教師資料查詢 | 類別: 會議論文 | 教師: 張 煖 Chang, Hsuan (瀏覽個人網頁)

標題:CFD simulation of direct contact membrane distillation modules with rough surface channels
學年103
學期2
發表日期2015/03/28
作品名稱CFD simulation of direct contact membrane distillation modules with rough surface channels
作品名稱(其他語言)
著者Chang, Hsuan; Hsu, Jian-An; Chang, Cheng-Liang; Ho, Chii-Dong
作品所屬單位淡江大學化學工程與材料工程學系
出版者Masdar Institute of Science and Technology
會議名稱The 7th International Conference on Applied Energy (ICAE 2015)
會議地點Abu Dhabi, United Arab Emirates
摘要Membrane distillation (MD) can utilize low level thermal energy and holds high potential to replace conventional energetically intensive separation technologies. Direct contact membrane distillation (DCMD) is suitable for the applications of desalination and concentration of aqueous solutions. Employing spacer-filled channels can enhance the mass flux of the DCMD modules, which can further result in the increase of energy utilization efficiency of the separation. The trans-membrane mass flux is controlled by the boundary layer heat transfer of both fluid channels. The estimation of heat transfer coefficients is critical to the analysis and design of MD modules. This paper presents the results of a comprehensive 3-D computational fluid dynamics (CFD) simulation which covers the entire length of the module and takes into account the trans-membrane heat and mass transfer. The model was verified with experimental data in the literature. The contour maps show that spacers create high velocity regions in the vicinity of the membrane. The trans-membrane heat and mass fluxes both show fluctuating patterns corresponding to the repetitive structure of the spaces and the fluxes are much higher than that of the modules using empty channels. The heat transfer coefficient enhancement factors obtained from CFD simulation are significantly higher than the predictions from literature correlations. The model can serve as an effective tool for developing correlations of heat transfer coefficients and optimal design of spacer-filled MD modules.
關鍵字Computational fluid dynamics; Membrane distillation; Heat transfer; Spacers
語言英文(美國)
收錄於EI
會議性質國際
校內研討會地點
研討會時間20150328~20150331
通訊作者Chang, Hsuan
國別阿聯
公開徵稿Y
出版型式紙本
出處Proceeding of The 7th International Conference on Applied Energy
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