Mass transfer enhancement of hollow fiber membrane deoxygenation by Dean vortices
| Autor: | Tian Hua, Yi-zhen Zhang, Liping Zhu, Qing-Ran Kong, Ming-Yong Zhou, Li-Feng Fang, Bao-Ku Zhu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
General Engineering Membrane structure Reynolds number 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology Vortex symbols.namesake 020401 chemical engineering Continuity equation Hollow fiber membrane Condensed Matter::Superconductivity Mass transfer symbols Gaseous diffusion 0204 chemical engineering 0210 nano-technology Deoxygenation |
| Zdroj: | Journal of Zhejiang University-SCIENCE A. 20:601-613 |
| ISSN: | 1862-1775 1673-565X |
| Popis: | This paper reports a modeling and experimental study of the mass transfer enhancement of water deoxygenation by using a helical hollow fiber membrane (HHFM) to enable Dean vortices. Experiments demonstrated that the HHFM deoxygenating rate was doubled compared with straight hollow fiber deoxygenation. A new model to describe the HHFM deoxygenation mass transfer was derived combining the helical coordinate system mass continuity equation on the lumen side and a modified dusty gas model for the mutual gaseous diffusion in the porous membrane. The model simulation showed that Dean vortices induce transverse fluid disturbance in the fiber, which significantly promotes lumen side mass transfer. The key parameters influencing the strength of Dean vortices are the Reynolds number of the lumen side and the curvature of HHFM. Operating and membrane structure parameters were optimized for HHFM deoxygenation design. The new model could be employed to describe quantitatively the mass transfer behavior of all types of HHFM gas-phase separation processes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink