A synergetic hybridization of adsorption cycle with the multi-effect distillation (MED)

Handle URI:
http://hdl.handle.net/10754/563290
Title:
A synergetic hybridization of adsorption cycle with the multi-effect distillation (MED)
Authors:
Thu, K.; Kim, Youngdeuk; Amy, Gary L.; Chun, Wongee; Ng, Kim Choon ( 0000-0003-3930-4127 )
Abstract:
Multi-effect distillation (MED) systems are proven and energy efficient thermally-driven desalination systems for handling harsh seawater feed in the Gulf region. The high cycle efficiency is markedly achieved by latent energy re-use with minimal stage temperature-difference across the condensing steam and the evaporating saline seawater in each stage. The efficacies of MED system are (i) its low stage-temperature-difference between top brine temperature (TBT) and final condensing temperature, (ii) its robustness to varying salinity and ability to handle harmful algae Blooming (HABs) and (iii) its compact foot-print per unit water output. The practical TBT of MED systems, hitherto, is around 65 C for controllable scaling and fouling with the ambient-limited final condenser temperature, usually from 30 to 45 C. The adsorption (ADC) cycles utilize low-temperature heat sources (typically below 90 C) to produce useful cooling power and potable water. Hybridizing MED with AD cycles, they synergistically improve the water production rates at the same energy input whilst the AD cycle is driven by the recovered waste heat. We present a practical AD + MED combination that can be retrofitted to existing MEDs: The cooling energy of AD cycle through the water vapor uptake by the adsorbent is recycled internally, providing lower temperature condensing environment in the effects whilst the final condensing temperature of MED is as low as 5-10 C, which is below ambient. The increase in the temperature difference between TBT and final condensing temperature accommodates additional MED stages. A detailed numerical model is presented to capture the transient behaviors of heat and mass interactions in the combined AD + MED cycles and the results are presented in terms of key variables. It is observed that the water production rates of the combined cycle increase to give a GOR of 8.8 from an initial value of 5.9. © 2013 Elsevier Ltd. All rights reserved.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC); Water Desalination & Reuse Research Cntr; Biological and Environmental Sciences and Engineering (BESE) Division
Publisher:
Elsevier BV
Journal:
Applied Thermal Engineering
Issue Date:
Jan-2014
DOI:
10.1016/j.applthermaleng.2013.09.023
Type:
Article
ISSN:
13594311
Sponsors:
The authors gratefully acknowledge the financial support from National Research Foundation, Singapore, under the research grant (R-265-000-466-281), King Abdullah University of Science and Technology under the grant (WBS: 7000000411) and the World Class University (WCU) Project of the National Research Foundation (Grant No. R33-2009-000-101660) from, Korea.
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorThu, K.en
dc.contributor.authorKim, Youngdeuken
dc.contributor.authorAmy, Gary L.en
dc.contributor.authorChun, Wongeeen
dc.contributor.authorNg, Kim Choonen
dc.date.accessioned2015-08-03T11:44:59Zen
dc.date.available2015-08-03T11:44:59Zen
dc.date.issued2014-01en
dc.identifier.issn13594311en
dc.identifier.doi10.1016/j.applthermaleng.2013.09.023en
dc.identifier.urihttp://hdl.handle.net/10754/563290en
dc.description.abstractMulti-effect distillation (MED) systems are proven and energy efficient thermally-driven desalination systems for handling harsh seawater feed in the Gulf region. The high cycle efficiency is markedly achieved by latent energy re-use with minimal stage temperature-difference across the condensing steam and the evaporating saline seawater in each stage. The efficacies of MED system are (i) its low stage-temperature-difference between top brine temperature (TBT) and final condensing temperature, (ii) its robustness to varying salinity and ability to handle harmful algae Blooming (HABs) and (iii) its compact foot-print per unit water output. The practical TBT of MED systems, hitherto, is around 65 C for controllable scaling and fouling with the ambient-limited final condenser temperature, usually from 30 to 45 C. The adsorption (ADC) cycles utilize low-temperature heat sources (typically below 90 C) to produce useful cooling power and potable water. Hybridizing MED with AD cycles, they synergistically improve the water production rates at the same energy input whilst the AD cycle is driven by the recovered waste heat. We present a practical AD + MED combination that can be retrofitted to existing MEDs: The cooling energy of AD cycle through the water vapor uptake by the adsorbent is recycled internally, providing lower temperature condensing environment in the effects whilst the final condensing temperature of MED is as low as 5-10 C, which is below ambient. The increase in the temperature difference between TBT and final condensing temperature accommodates additional MED stages. A detailed numerical model is presented to capture the transient behaviors of heat and mass interactions in the combined AD + MED cycles and the results are presented in terms of key variables. It is observed that the water production rates of the combined cycle increase to give a GOR of 8.8 from an initial value of 5.9. © 2013 Elsevier Ltd. All rights reserved.en
dc.description.sponsorshipThe authors gratefully acknowledge the financial support from National Research Foundation, Singapore, under the research grant (R-265-000-466-281), King Abdullah University of Science and Technology under the grant (WBS: 7000000411) and the World Class University (WCU) Project of the National Research Foundation (Grant No. R33-2009-000-101660) from, Korea.en
dc.publisherElsevier BVen
dc.subjectAdsorption desalinationen
dc.subjectHybrid desalination cycleen
dc.subjectMulti-effect distillationen
dc.subjectWaste heat recoveryen
dc.titleA synergetic hybridization of adsorption cycle with the multi-effect distillation (MED)en
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentWater Desalination & Reuse Research Cntren
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.identifier.journalApplied Thermal Engineeringen
dc.contributor.institutionMechanical Engineering Department, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singaporeen
dc.contributor.institutionDepartment of Nuclear and Energy Engineering, Cheju National University, 66 Jejudaehakno, Jejusi, South Koreaen
kaust.authorKim, Youngdeuken
kaust.authorAmy, Gary L.en
kaust.authorNg, Kim Choonen
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