會議論文
| 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 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/101462 ) |