Staff View: Electrodialysis desalination: The impact of solution flowrate (or Reynolds number) on fluid dynamics throughout membrane spacers

Electrodialysis desalination: The impact of solution flowrate (or Reynolds number) on fluid dynamics throughout membrane spacers

The incorporation of a spacer among membranes has a major influence on fluid dynamics and performance metrics. Spacers create feed channels and operate as turbulence promoters to increase mixing and reduce concentration/temperature polarization effects. However, spacer geometry remains unoptimized,...

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Main Authors:	Al-Amshawee, Sajjad Khudhur Abbas, Mohd Yusri, Mohd Yunus
Format:	Article
Language:	English English
Published:	Elsevier Ltd 2023
Subjects:	TD Environmental technology. Sanitary engineering TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/39946/1/1-s2.0-S0013935122024422-main-2.pdf http://umpir.ump.edu.my/id/eprint/39946/7/Electrodialysis%20desalination-%20The%20impact%20of%20solution%20flowrate.pdf http://umpir.ump.edu.my/id/eprint/39946/ https://doi.org/10.1016/j.envres.2022.115115 https://doi.org/10.1016/j.envres.2022.115115
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spelling	my.ump.umpir.399462024-01-11T01:09:31Z http://umpir.ump.edu.my/id/eprint/39946/ Electrodialysis desalination: The impact of solution flowrate (or Reynolds number) on fluid dynamics throughout membrane spacers Al-Amshawee, Sajjad Khudhur Abbas Mohd Yusri, Mohd Yunus TD Environmental technology. Sanitary engineering TP Chemical technology The incorporation of a spacer among membranes has a major influence on fluid dynamics and performance metrics. Spacers create feed channels and operate as turbulence promoters to increase mixing and reduce concentration/temperature polarization effects. However, spacer geometry remains unoptimized, and studies continue to investigate a wide range of commercial and custom-made spacer designs. The in-depth discussion of the present systematic review seeks to discover the influence of Reynolds number or solution flowrate on flow hydrodynamics throughout a spacer-filled channel. A fast-flowing solution sweeping one membrane's surface first, then the neighboring membrane's surface produces good mixing action, which does not happen commonly at laminar solution flowrates. A sufficient flowrate can suppress the polarization layer, which may normally require the utilization of a simple feed channel rather than complex spacer configurations. When a recirculation eddy occurs, it disrupts the continuous flow and effectively curves the linear fluid courses. The higher the flowrate, the better the membrane performance, the higher the critical flux (or recovery rate), and the lower the inherent limitations of spacer design, spacer shadow effect, poor channel hydrodynamics, and high concentration polarization. In fact, critical flow achieves an acceptable balance between improving flow dynamics and reducing the related trade-offs, such as pressure losses and the occurrence of concentration polarization throughout the cell. If the necessary technical flowrate is not used, the real concentration potential for transport is relatively limited at low velocities than would be predicted based on bulk concentrations. Electrodialysis stack therefore may suffer from the dissociation of water molecules. Next studies should consider that applying a higher flowrate results in greater process efficiency, increased mass transfer potential at the membrane interface, and reduced stack thermal and electrical resistance, where pressure drop should always be indicated as a consequence of the spacer and circumstances used, rather than a problem. Elsevier Ltd 2023-02 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/39946/1/1-s2.0-S0013935122024422-main-2.pdf pdf en http://umpir.ump.edu.my/id/eprint/39946/7/Electrodialysis%20desalination-%20The%20impact%20of%20solution%20flowrate.pdf Al-Amshawee, Sajjad Khudhur Abbas and Mohd Yusri, Mohd Yunus (2023) Electrodialysis desalination: The impact of solution flowrate (or Reynolds number) on fluid dynamics throughout membrane spacers. Environmental Research, 219 (115115). pp. 1-17. ISSN 0013-9351. (Published) https://doi.org/10.1016/j.envres.2022.115115 https://doi.org/10.1016/j.envres.2022.115115
institution	Universiti Malaysia Pahang Al-Sultan Abdullah
building	UMPSA Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaysia Pahang Al-Sultan Abdullah
content_source	UMPSA Institutional Repository
url_provider	http://umpir.ump.edu.my/
language	English English
topic	TD Environmental technology. Sanitary engineering TP Chemical technology
spellingShingle	TD Environmental technology. Sanitary engineering TP Chemical technology Al-Amshawee, Sajjad Khudhur Abbas Mohd Yusri, Mohd Yunus Electrodialysis desalination: The impact of solution flowrate (or Reynolds number) on fluid dynamics throughout membrane spacers
description	The incorporation of a spacer among membranes has a major influence on fluid dynamics and performance metrics. Spacers create feed channels and operate as turbulence promoters to increase mixing and reduce concentration/temperature polarization effects. However, spacer geometry remains unoptimized, and studies continue to investigate a wide range of commercial and custom-made spacer designs. The in-depth discussion of the present systematic review seeks to discover the influence of Reynolds number or solution flowrate on flow hydrodynamics throughout a spacer-filled channel. A fast-flowing solution sweeping one membrane's surface first, then the neighboring membrane's surface produces good mixing action, which does not happen commonly at laminar solution flowrates. A sufficient flowrate can suppress the polarization layer, which may normally require the utilization of a simple feed channel rather than complex spacer configurations. When a recirculation eddy occurs, it disrupts the continuous flow and effectively curves the linear fluid courses. The higher the flowrate, the better the membrane performance, the higher the critical flux (or recovery rate), and the lower the inherent limitations of spacer design, spacer shadow effect, poor channel hydrodynamics, and high concentration polarization. In fact, critical flow achieves an acceptable balance between improving flow dynamics and reducing the related trade-offs, such as pressure losses and the occurrence of concentration polarization throughout the cell. If the necessary technical flowrate is not used, the real concentration potential for transport is relatively limited at low velocities than would be predicted based on bulk concentrations. Electrodialysis stack therefore may suffer from the dissociation of water molecules. Next studies should consider that applying a higher flowrate results in greater process efficiency, increased mass transfer potential at the membrane interface, and reduced stack thermal and electrical resistance, where pressure drop should always be indicated as a consequence of the spacer and circumstances used, rather than a problem.
format	Article
author	Al-Amshawee, Sajjad Khudhur Abbas Mohd Yusri, Mohd Yunus
author_facet	Al-Amshawee, Sajjad Khudhur Abbas Mohd Yusri, Mohd Yunus
author_sort	Al-Amshawee, Sajjad Khudhur Abbas
title	Electrodialysis desalination: The impact of solution flowrate (or Reynolds number) on fluid dynamics throughout membrane spacers
title_short	Electrodialysis desalination: The impact of solution flowrate (or Reynolds number) on fluid dynamics throughout membrane spacers
title_full	Electrodialysis desalination: The impact of solution flowrate (or Reynolds number) on fluid dynamics throughout membrane spacers
title_fullStr	Electrodialysis desalination: The impact of solution flowrate (or Reynolds number) on fluid dynamics throughout membrane spacers
title_full_unstemmed	Electrodialysis desalination: The impact of solution flowrate (or Reynolds number) on fluid dynamics throughout membrane spacers
title_sort	electrodialysis desalination: the impact of solution flowrate (or reynolds number) on fluid dynamics throughout membrane spacers
publisher	Elsevier Ltd
publishDate	2023
url	http://umpir.ump.edu.my/id/eprint/39946/1/1-s2.0-S0013935122024422-main-2.pdf http://umpir.ump.edu.my/id/eprint/39946/7/Electrodialysis%20desalination-%20The%20impact%20of%20solution%20flowrate.pdf http://umpir.ump.edu.my/id/eprint/39946/ https://doi.org/10.1016/j.envres.2022.115115 https://doi.org/10.1016/j.envres.2022.115115
_version_	1822924069477023744
score	13.235362

Electrodialysis desalination: The impact of solution flowrate (or Reynolds number) on fluid dynamics throughout membrane spacers

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