CFD simulation of hydrodynamics and concentration polarization in osmotically assisted reverse osmosis membrane systems
Osmotically assisted reverse osmosis (OARO) has been recently suggested as an alternative to improve water recovery of reverse osmosis (RO) for applications in which RO has reached its limit. To elucidate the physics, a computational fluid dynamics (CFD) methodology is developed that describes all i...
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| Format: | Article |
| Language: | English English |
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Elsevier
2024
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| Online Access: | http://umpir.ump.edu.my/id/eprint/39504/1/CFD%20simulation%20of%20hydrodynamics%20and%20concentration%20polarization%20in%20osmotically%20assisted%20reverse%20osmosis%20membrane%20systems%20%28intro%29.pdf http://umpir.ump.edu.my/id/eprint/39504/2/CFD%20simulation%20of%20hydrodynamics%20and%20concentration%20polarization%20in%20osmotically%20assisted%20reverse%20osmosis%20membrane%20systems.pdf |
| _version_ | 1825815309299220480 |
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| author | Chong, Y. K. Fletcher, D. F. Liang, Y. Y. |
| author_facet | Chong, Y. K. Fletcher, D. F. Liang, Y. Y. |
| author_sort | Chong, Y. K. |
| collection | UMP |
| description | Osmotically assisted reverse osmosis (OARO) has been recently suggested as an alternative to improve water recovery of reverse osmosis (RO) for applications in which RO has reached its limit. To elucidate the physics, a computational fluid dynamics (CFD) methodology is developed that describes all important physical phenomena occurring in the feed, porous and draw sides of OARO. The CFD model shows good agreement with the reported experimental data and predicts the water flux better than a simplified analytical model. This paper reveals that external concentration polarization (ECP) at the feed side is more important than internal concentration polarization (ICP) within the porous support layer, especially for a system with a high transmembrane pressure, Δp (≥40 bar). In contrast to conventional RO, where concentration polarization (CP) at the permeate side is negligible, OARO experiences a non-negligible ECP at the draw (permeate) side, particularly in cases with high Δp. This analysis also found that both counter-current and co-current configurations show similar flux performance at module scale. |
| first_indexed | 2024-03-06T13:11:35Z |
| format | Article |
| id | UMPir39504 |
| institution | Universiti Malaysia Pahang |
| language | English English |
| last_indexed | 2024-03-06T13:11:35Z |
| publishDate | 2024 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | UMPir395042023-12-04T00:13:27Z http://umpir.ump.edu.my/id/eprint/39504/ CFD simulation of hydrodynamics and concentration polarization in osmotically assisted reverse osmosis membrane systems Chong, Y. K. Fletcher, D. F. Liang, Y. Y. TP Chemical technology Osmotically assisted reverse osmosis (OARO) has been recently suggested as an alternative to improve water recovery of reverse osmosis (RO) for applications in which RO has reached its limit. To elucidate the physics, a computational fluid dynamics (CFD) methodology is developed that describes all important physical phenomena occurring in the feed, porous and draw sides of OARO. The CFD model shows good agreement with the reported experimental data and predicts the water flux better than a simplified analytical model. This paper reveals that external concentration polarization (ECP) at the feed side is more important than internal concentration polarization (ICP) within the porous support layer, especially for a system with a high transmembrane pressure, Δp (≥40 bar). In contrast to conventional RO, where concentration polarization (CP) at the permeate side is negligible, OARO experiences a non-negligible ECP at the draw (permeate) side, particularly in cases with high Δp. This analysis also found that both counter-current and co-current configurations show similar flux performance at module scale. Elsevier 2024-01 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/39504/1/CFD%20simulation%20of%20hydrodynamics%20and%20concentration%20polarization%20in%20osmotically%20assisted%20reverse%20osmosis%20membrane%20systems%20%28intro%29.pdf pdf en http://umpir.ump.edu.my/id/eprint/39504/2/CFD%20simulation%20of%20hydrodynamics%20and%20concentration%20polarization%20in%20osmotically%20assisted%20reverse%20osmosis%20membrane%20systems.pdf Chong, Y. K. and Fletcher, D. F. and Liang, Y. Y. (2024) CFD simulation of hydrodynamics and concentration polarization in osmotically assisted reverse osmosis membrane systems. Journal of Water Process Engineering, 57 (104535). ISSN 2214-7144. (Published) https://doi.org/10.1016/j.jwpe.2023.104535 10.1016/j.jwpe.2023.104535 |
| spellingShingle | TP Chemical technology Chong, Y. K. Fletcher, D. F. Liang, Y. Y. CFD simulation of hydrodynamics and concentration polarization in osmotically assisted reverse osmosis membrane systems |
| title | CFD simulation of hydrodynamics and concentration polarization in osmotically assisted reverse osmosis membrane systems |
| title_full | CFD simulation of hydrodynamics and concentration polarization in osmotically assisted reverse osmosis membrane systems |
| title_fullStr | CFD simulation of hydrodynamics and concentration polarization in osmotically assisted reverse osmosis membrane systems |
| title_full_unstemmed | CFD simulation of hydrodynamics and concentration polarization in osmotically assisted reverse osmosis membrane systems |
| title_short | CFD simulation of hydrodynamics and concentration polarization in osmotically assisted reverse osmosis membrane systems |
| title_sort | cfd simulation of hydrodynamics and concentration polarization in osmotically assisted reverse osmosis membrane systems |
| topic | TP Chemical technology |
| url | http://umpir.ump.edu.my/id/eprint/39504/1/CFD%20simulation%20of%20hydrodynamics%20and%20concentration%20polarization%20in%20osmotically%20assisted%20reverse%20osmosis%20membrane%20systems%20%28intro%29.pdf http://umpir.ump.edu.my/id/eprint/39504/2/CFD%20simulation%20of%20hydrodynamics%20and%20concentration%20polarization%20in%20osmotically%20assisted%20reverse%20osmosis%20membrane%20systems.pdf |
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