Flow uneven-distribution and its impact on performances of forward osmosis module

Progresses on development of forward osmosis (FO) membrane should be accompanied with development of acceptable FO modules. Most flat-sheet FO membranes are assembled into the modified spiral wound module by introduction of an internal baffle which results in a U-shape flow path that allows flow une...

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Main Authors: Qing, L., Bilad, M.R., Sun, G., Jaafar, J., Fane, A.G.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.23446 /
Published: Elsevier Ltd 2020
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85074456758&doi=10.1016%2fj.jwpe.2019.101014&partnerID=40&md5=a4d3b08bff4c9b95759af8083e285f7f
http://eprints.utp.edu.my/23446/
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spelling utp-eprints.234462021-08-19T07:20:05Z Flow uneven-distribution and its impact on performances of forward osmosis module Qing, L. Bilad, M.R. Sun, G. Jaafar, J. Fane, A.G. Progresses on development of forward osmosis (FO) membrane should be accompanied with development of acceptable FO modules. Most flat-sheet FO membranes are assembled into the modified spiral wound module by introduction of an internal baffle which results in a U-shape flow path that allows flow uneven-distribution. This study assesses the flow uneven-distribution and its impact on a U-shape flow path and compares it with a straight flow path (I-shape), like the one in the plate-and-frame module. The flow distribution was visualized through the salt tracing test, dye tracing, computational fluid dynamics (CFD) simulation and particle image velocimetry (PIV). The performance of a bench-scale module of I-shape and U-shape was then assessed. Results from all visualization methods demonstrate large spatial flow variations in the U-shape flow path. However, it does not really affect the overall flux. The U-shape flow path benefits over the Ishape when operated at equal volumetric velocities. The I-shape path only shows higher fluxes by 21 and 3 when operated under equal cross flow velocities under active layer facing feed solution and active layer facing draw solution modes, respectively. The low fluxes in the U-shape flow path occur in the dead-zones. The flux variations in the U-shape flow path does not significantly affect the short-term membrane fouling but is expected to be more intense in the larger modules. A simple approach to combat flow uneven-distribution via inclusion of internal baffle can reduce uneven-distribution of flow. © 2019 Elsevier Ltd Elsevier Ltd 2020 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85074456758&doi=10.1016%2fj.jwpe.2019.101014&partnerID=40&md5=a4d3b08bff4c9b95759af8083e285f7f Qing, L. and Bilad, M.R. and Sun, G. and Jaafar, J. and Fane, A.G. (2020) Flow uneven-distribution and its impact on performances of forward osmosis module. Journal of Water Process Engineering, 33 . http://eprints.utp.edu.my/23446/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description Progresses on development of forward osmosis (FO) membrane should be accompanied with development of acceptable FO modules. Most flat-sheet FO membranes are assembled into the modified spiral wound module by introduction of an internal baffle which results in a U-shape flow path that allows flow uneven-distribution. This study assesses the flow uneven-distribution and its impact on a U-shape flow path and compares it with a straight flow path (I-shape), like the one in the plate-and-frame module. The flow distribution was visualized through the salt tracing test, dye tracing, computational fluid dynamics (CFD) simulation and particle image velocimetry (PIV). The performance of a bench-scale module of I-shape and U-shape was then assessed. Results from all visualization methods demonstrate large spatial flow variations in the U-shape flow path. However, it does not really affect the overall flux. The U-shape flow path benefits over the Ishape when operated at equal volumetric velocities. The I-shape path only shows higher fluxes by 21 and 3 when operated under equal cross flow velocities under active layer facing feed solution and active layer facing draw solution modes, respectively. The low fluxes in the U-shape flow path occur in the dead-zones. The flux variations in the U-shape flow path does not significantly affect the short-term membrane fouling but is expected to be more intense in the larger modules. A simple approach to combat flow uneven-distribution via inclusion of internal baffle can reduce uneven-distribution of flow. © 2019 Elsevier Ltd
format Article
author Qing, L.
Bilad, M.R.
Sun, G.
Jaafar, J.
Fane, A.G.
spellingShingle Qing, L.
Bilad, M.R.
Sun, G.
Jaafar, J.
Fane, A.G.
Flow uneven-distribution and its impact on performances of forward osmosis module
author_sort Qing, L.
title Flow uneven-distribution and its impact on performances of forward osmosis module
title_short Flow uneven-distribution and its impact on performances of forward osmosis module
title_full Flow uneven-distribution and its impact on performances of forward osmosis module
title_fullStr Flow uneven-distribution and its impact on performances of forward osmosis module
title_full_unstemmed Flow uneven-distribution and its impact on performances of forward osmosis module
title_sort flow uneven-distribution and its impact on performances of forward osmosis module
publisher Elsevier Ltd
publishDate 2020
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85074456758&doi=10.1016%2fj.jwpe.2019.101014&partnerID=40&md5=a4d3b08bff4c9b95759af8083e285f7f
http://eprints.utp.edu.my/23446/
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score 11.62408

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