Performance investigation of a solar-assisted direct contact membrane distillation system

Handle URI:
http://hdl.handle.net/10754/562576
Title:
Performance investigation of a solar-assisted direct contact membrane distillation system
Authors:
Kim, Youngdeuk; Thu, Kyaw; Ghaffour, Noreddine ( 0000-0003-2095-4736 ) ; Ng, Kim Choon ( 0000-0003-3930-4127 )
Abstract:
This paper presents a solar-assisted direct contact membrane distillation (DCMD) system with novel energy recovery concepts for a continuous 24-h-a-day operation. A temperature modulating scheme is introduced to the solar-thermal system that supplies feed seawater to the DCMD modules. This scheme attenuates extreme temperature fluctuations of the feed water by storing the collected energy during solar-peak hours and reutilizing it throughout the day. Thus, the energy savings is realized yet the feed seawater temperature is maintained within the desired range. Additionally, the system employs heat recovery from the permeate and brine streams to the feed seawater. The simulations for such a system with a shell-and-tube type DCMD modules are carried out to examine the spatial property variations and the sensitivity of system performance (i.e., transmembrane pressure, permeate flux and performance ratio) to the operating conditions (inlet temperature and flow rate) and the fiber dimensions (fiber length and packing density). It is found that there are trade-offs between mean permeate flux and performance ratio with respect to permeate inlet temperature and flow rate and between total distillate production and performance ratio with respect to packing density. For the solar-assisted DCMD system having evacuated-tube collectors of 3360m2 with 160m3 seawater storage tanks and 50 DCMD modules, the annual solar fraction and the collector efficiency are found to be 77% and 53%, respectively, whilst the overall permeate production capacity is 31m3/day. The overall specific thermal energy consumption of the DCMD system with heat recovery is found to be 436kWh/m3 and it is about 43% lower as compared to the system without heat recovery. It is observed that the specific thermal energy consumption decreases significantly by 55% with increased collector area from 1983m2 to 3360m2 whereas the specific electrical energy consumption increases slightly by 16%. © 2012 Elsevier B.V.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC); Water Desalination & Reuse Research Cntr
Publisher:
Elsevier BV
Journal:
Journal of Membrane Science
Issue Date:
Jan-2013
DOI:
10.1016/j.memsci.2012.10.008
Type:
Article
ISSN:
03767388
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorKim, Youngdeuken
dc.contributor.authorThu, Kyawen
dc.contributor.authorGhaffour, Noreddineen
dc.contributor.authorNg, Kim Choonen
dc.date.accessioned2016-05-22T09:33:03Z-
dc.date.available2015-08-03T10:43:25Zen
dc.date.available2016-05-22T09:33:03Z-
dc.date.issued2013-01-
dc.identifier.issn03767388-
dc.identifier.doi10.1016/j.memsci.2012.10.008-
dc.identifier.urihttp://hdl.handle.net/10754/562576-
dc.description.abstractThis paper presents a solar-assisted direct contact membrane distillation (DCMD) system with novel energy recovery concepts for a continuous 24-h-a-day operation. A temperature modulating scheme is introduced to the solar-thermal system that supplies feed seawater to the DCMD modules. This scheme attenuates extreme temperature fluctuations of the feed water by storing the collected energy during solar-peak hours and reutilizing it throughout the day. Thus, the energy savings is realized yet the feed seawater temperature is maintained within the desired range. Additionally, the system employs heat recovery from the permeate and brine streams to the feed seawater. The simulations for such a system with a shell-and-tube type DCMD modules are carried out to examine the spatial property variations and the sensitivity of system performance (i.e., transmembrane pressure, permeate flux and performance ratio) to the operating conditions (inlet temperature and flow rate) and the fiber dimensions (fiber length and packing density). It is found that there are trade-offs between mean permeate flux and performance ratio with respect to permeate inlet temperature and flow rate and between total distillate production and performance ratio with respect to packing density. For the solar-assisted DCMD system having evacuated-tube collectors of 3360m2 with 160m3 seawater storage tanks and 50 DCMD modules, the annual solar fraction and the collector efficiency are found to be 77% and 53%, respectively, whilst the overall permeate production capacity is 31m3/day. The overall specific thermal energy consumption of the DCMD system with heat recovery is found to be 436kWh/m3 and it is about 43% lower as compared to the system without heat recovery. It is observed that the specific thermal energy consumption decreases significantly by 55% with increased collector area from 1983m2 to 3360m2 whereas the specific electrical energy consumption increases slightly by 16%. © 2012 Elsevier B.V.en
dc.publisherElsevier BVen
dc.rightsThis is the author's accepted manuscript. The final version was published in the Journal of Membrane Science in in 2013 with the DOI: 10.1016/j.memsci.2012.10.008en
dc.subjectHeat recovery (HR)en
dc.subjectHollow fiber direct contact membrane distillation (DCMD)en
dc.subjectModelingen
dc.subjectSolar-assisted desalinationen
dc.subjectTemperature modulating (TM)en
dc.titlePerformance investigation of a solar-assisted direct contact membrane distillation systemen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentWater Desalination & Reuse Research Cntren
dc.identifier.journalJournal of Membrane Scienceen
dc.eprint.versionPost-printen
dc.contributor.institutionDepartment of Mechanical Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 117576, Singaporeen
kaust.authorKim, Youngdeuken
kaust.authorThu, Kyawen
kaust.authorGhaffour, Noreddineen
kaust.authorNg, Kim Choonen

Version History

VersionItem Editor Date Summary
2 10754/562576grenzdm2016-05-22 10:28:30.0Accepted manuscript received from Noreddine Ghaffour. - DG
1 10754/562576.1grenzdm2015-08-03 11:43:25.0null
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