CFD study of heat transfer enhanced membrane distillation using spacer-filled channels
學年 103
學期 2
發表日期 2015-03-28
作品名稱 CFD study of heat transfer enhanced membrane distillation using spacer-filled 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 en_US
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 ARE
公開徵稿 Y
出版型式 電子版
出處 Proceeding of The 7th International Conference on Applied Energy
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