Performance of adsorbent-embedded heat exchangers using binder-coating method

Handle URI:
http://hdl.handle.net/10754/594234
Title:
Performance of adsorbent-embedded heat exchangers using binder-coating method
Authors:
Li, Ang; Thu, Kyaw; Ismail, Azhar Bin; Shahzad, Muhammad Wakil; Ng, Kim Choon ( 0000-0003-3930-4127 )
Abstract:
The performance of adsorption (AD) chillers or desalination cycles is dictated by the rates of heat and mass transfer of adsorbate in adsorbent-packed beds. Conventional granular-adsorbent, packed in fin-tube heat exchangers, suffered from poor heat transfer in heating (desorption) or cooling (adsorption) processes of the batch-operated cycles, with undesirable performance parameters such as higher footprint of plants, low coefficient of performance (COP) of AD cycles and higher capital cost of the machines. The motivation of present work is to mitigate the heat and mass "bottlenecks" of fin-tube heat exchangers by using a powdered-adsorbent cum binder coated onto the fin surfaces of exchangers. Suitable adsorbent-binder pairs have been identified for the silica gel adsorbent with pore surface areas up to 680 m2/g and pore diameters less than 6 nm. The parent silica gel remains largely unaffected despite being pulverized into fine particles of 100 μm, and yet maintaining its water uptake characteristics. The paper presents an experimental study on the selection and testing processes to achieve high efficacy of adsorbent-binder coated exchangers. The test results indicate 3.4-4.6 folds improvement in heat transfer rates over the conventional granular-packed method, resulting a faster rate of water uptake by 1.5-2 times on the suitable silica gel type. © 2015 Elsevier Ltd. All rights reserved.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC)
Citation:
Li A, Thu K, Ismail AB, Shahzad MW, Ng KC (2016) Performance of adsorbent-embedded heat exchangers using binder-coating method. International Journal of Heat and Mass Transfer 92: 149–157. Available: http://dx.doi.org/10.1016/j.ijheatmasstransfer.2015.08.097.
Publisher:
Elsevier BV
Journal:
International Journal of Heat and Mass Transfer
Issue Date:
Jan-2016
DOI:
10.1016/j.ijheatmasstransfer.2015.08.097
Type:
Article
ISSN:
0017-9310
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorLi, Angen
dc.contributor.authorThu, Kyawen
dc.contributor.authorIsmail, Azhar Binen
dc.contributor.authorShahzad, Muhammad Wakilen
dc.contributor.authorNg, Kim Choonen
dc.date.accessioned2016-01-19T14:44:00Zen
dc.date.available2016-01-19T14:44:00Zen
dc.date.issued2016-01en
dc.identifier.citationLi A, Thu K, Ismail AB, Shahzad MW, Ng KC (2016) Performance of adsorbent-embedded heat exchangers using binder-coating method. International Journal of Heat and Mass Transfer 92: 149–157. Available: http://dx.doi.org/10.1016/j.ijheatmasstransfer.2015.08.097.en
dc.identifier.issn0017-9310en
dc.identifier.doi10.1016/j.ijheatmasstransfer.2015.08.097en
dc.identifier.urihttp://hdl.handle.net/10754/594234en
dc.description.abstractThe performance of adsorption (AD) chillers or desalination cycles is dictated by the rates of heat and mass transfer of adsorbate in adsorbent-packed beds. Conventional granular-adsorbent, packed in fin-tube heat exchangers, suffered from poor heat transfer in heating (desorption) or cooling (adsorption) processes of the batch-operated cycles, with undesirable performance parameters such as higher footprint of plants, low coefficient of performance (COP) of AD cycles and higher capital cost of the machines. The motivation of present work is to mitigate the heat and mass "bottlenecks" of fin-tube heat exchangers by using a powdered-adsorbent cum binder coated onto the fin surfaces of exchangers. Suitable adsorbent-binder pairs have been identified for the silica gel adsorbent with pore surface areas up to 680 m2/g and pore diameters less than 6 nm. The parent silica gel remains largely unaffected despite being pulverized into fine particles of 100 μm, and yet maintaining its water uptake characteristics. The paper presents an experimental study on the selection and testing processes to achieve high efficacy of adsorbent-binder coated exchangers. The test results indicate 3.4-4.6 folds improvement in heat transfer rates over the conventional granular-packed method, resulting a faster rate of water uptake by 1.5-2 times on the suitable silica gel type. © 2015 Elsevier Ltd. All rights reserved.en
dc.publisherElsevier BVen
dc.subjectAdsorption heat transferen
dc.subjectAdsorption isothermsen
dc.subjectBinderen
dc.subjectHydroxyethyl celluloseen
dc.subjectSilica gel-wateren
dc.titlePerformance of adsorbent-embedded heat exchangers using binder-coating methoden
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.identifier.journalInternational Journal of Heat and Mass Transferen
dc.contributor.institutionDepartment of Mechanical Engineering, National University of Singapore, Singapore, Singaporeen
kaust.authorIsmail, Azhar Binen
kaust.authorShahzad, Muhammad Wakilen
kaust.authorNg, Kim Choonen
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