Novel designs for improving the performance of hollow fiber membrane distillation modules
Five types of novel hollow fiber module configurations with structured-straight fibers, curly fibers, central-tubing for feeding, spacer-wrapped and spacer-knitted fibers, have been designed and constructed for the direct contact membrane distillation (DCMD) process. Their module performances were evalua...
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sg-ntu-dr.10356-1021552020-03-07T11:43:35Z Novel designs for improving the performance of hollow fiber membrane distillation modules Yang, Xing Wang, Rong Fane, Anthony Gordon School of Civil and Environmental Engineering Singapore Membrane Technology Centre DRNTU::Engineering::Environmental engineering::Water treatment Five types of novel hollow fiber module configurations with structured-straight fibers, curly fibers, central-tubing for feeding, spacer-wrapped and spacer-knitted fibers, have been designed and constructed for the direct contact membrane distillation (DCMD) process. Their module performances were evaluated based on permeation flux experiments, fluid dynamics studies, and tracer-response tests for flow distribution as well as process heat transfer analysis. The novel designs showed flux enhancement from 53% to 92% compared to the conventional module, and the spacer-knitted module had the best performance. The fluxes of all the modified configurations, except the structured-straight module, were independent of the feed flow velocity, and the modules with undulating membrane surfaces (curly and spacer-knitted fibers) were able to achieve more than 300% flux improvement in the laminar flow regime. The improved performance was attributed to the improved fiber geometries or arrangements that can provide effective boundary layer surface renewal and more uniform flow distribution, confirmed by the sodium chloride tracer response measurements. The heat transfer analysis underscores the advantage of the module with curly fibers with the least temperature polarization effect (temperature polarization coefficient = 0.81–0.65 at Tm= 303–333 K), which is favorable for enhancing permeation flux. Accepted version 2013-05-30T04:45:58Z 2019-12-06T20:50:28Z 2013-05-30T04:45:58Z 2019-12-06T20:50:28Z 2011 2011 Journal Article Yang, X., Wang, R., & Fane, A. G. (2011). Novel designs for improving the performance of hollow fiber membrane distillation modules. Journal of Membrane Science, 384(1–2), 52-62. 0376-7388 https://hdl.handle.net/10356/102155 http://hdl.handle.net/10220/10024 10.1016/j.memsci.2011.09.007 173003 en Journal of membrane science © 2011 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Membrane Science, Elsevier B.V. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1016/j.memsci.2011.09.007]. 11 p. application/pdf |
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DRNTU::Engineering::Environmental engineering::Water treatment Yang, Xing Wang, Rong Fane, Anthony Gordon Novel designs for improving the performance of hollow fiber membrane distillation modules |
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Five types of novel hollow fiber module configurations with structured-straight fibers, curly fibers, central-tubing for feeding, spacer-wrapped and spacer-knitted fibers, have been designed and constructed for the direct contact membrane distillation (DCMD) process. Their module performances were evaluated based on permeation flux experiments, fluid dynamics studies, and tracer-response tests for flow distribution as well as process heat transfer analysis. The novel designs showed flux enhancement from 53% to 92% compared to the conventional module, and the spacer-knitted module had the best performance. The fluxes of all the modified configurations, except the structured-straight module, were independent of the feed flow velocity, and the modules with undulating membrane surfaces (curly and spacer-knitted fibers) were able to achieve more than 300% flux improvement in the laminar flow regime. The improved performance was attributed to the improved fiber geometries or arrangements that can provide effective boundary layer surface renewal and more uniform flow distribution, confirmed by the sodium chloride tracer response measurements. The heat transfer analysis underscores the advantage of the module with curly fibers with the least temperature polarization effect (temperature polarization coefficient = 0.81–0.65 at Tm= 303–333 K), which is favorable for enhancing permeation flux. |
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School of Civil and Environmental Engineering |
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School of Civil and Environmental Engineering Yang, Xing Wang, Rong Fane, Anthony Gordon |
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Article |
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Yang, Xing Wang, Rong Fane, Anthony Gordon |
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Yang, Xing |
title |
Novel designs for improving the performance of hollow fiber membrane distillation modules |
title_short |
Novel designs for improving the performance of hollow fiber membrane distillation modules |
title_full |
Novel designs for improving the performance of hollow fiber membrane distillation modules |
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Novel designs for improving the performance of hollow fiber membrane distillation modules |
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Novel designs for improving the performance of hollow fiber membrane distillation modules |
title_sort |
novel designs for improving the performance of hollow fiber membrane distillation modules |
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2013 |
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https://hdl.handle.net/10356/102155 http://hdl.handle.net/10220/10024 |
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