- 學位論文
模擬雙側流之掃流微過濾系統
Simulation of a two side-stream cross-flow microfiltration system
摘要
已知在掃流微過濾的系統，於膜面上施加流體力學之受力，會影響濾餅的型態與過濾的效果的。本研究所模擬的進料物分別為純水與生質酒精，利用計算流力(computational fluid dynamics, CFD)，對於掃流微過濾的裝置建立出模擬的構造型態、模擬的空間網格，以及邊界條件之設定。於雙側流模擬掃流微過濾系統，在平板的兩側各加裝一個進料口，藉由改變濾室中的流力情形，使膜面上的剪應力有所變化，並探討不同進料入射的角度對於膜面上剪應力的變化情形。對於模擬出的速度流場及膜面上的剪應力分佈均可藉由CFD計算出，並可助於如何設計過濾系統，進而增加濾速、減少膜面上的阻塞及延長過濾的水洗週期。
並列摘要
It’s known that under cross-flow microfiltration, the major factors influencing cake formation as well as the overall filtration resistance were found to be the hydrodynamic forces exerted on the membrane. In this study, we simulated pure water and bio-ethanol, and the simulating geometry of the cross-flow microfiltration was established, the meshes were constructed, and the boundary conditions were set, then the velocity field, the total filtration resistance, and the shear force distribution on the membrane surface could be calculated by computational fluid dynamics, CFD. In the system，we install a two side-stream on flat sides and change the different inlet angle to improve fouling condition on the membrane and to observe alterations in the shear force on the membrane. This design could help to effectively increase the permeate flux, reduce the fouling on the membrane and extend the washing cycle during filtration.
參考文獻
延伸閱讀
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- 李國禎（2007）。Simulation of Force on Membrane Surface and Resistance of Membrane during Cross-flow Microfiltration〔碩士論文，淡江大學〕。華藝線上圖書館。https://doi.org/10.6846/TKU.2007.00820