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Improving indoor thermal comfort and heat transfer efficiency through surface modifications on heat exchangers.

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Title: Improving indoor thermal comfort and heat transfer efficiency through surface modifications on heat exchangers.
Authors: Li, Boxuan1 (AUTHOR), Liang, Dong1,2 (AUTHOR), Ma, Wei1 (AUTHOR) wmaad@connect.ust.hk, Yao, Shuhuai1 (AUTHOR) meshyao@ust.hk
Source: International Journal of Heat & Mass Transfer. Oct2026, Vol. 267, pN.PAG-N.PAG. 1p.
Subjects: Heat exchangers, Surface coatings, Heat exchanger efficiency, Hydrophobic surfaces, Thermal comfort, Heat transfer, Humidity control, Surface preparation
Abstract: Air conditioning systems are prevalent in everyday life and serve a crucial role in improving thermal comfort. However, the predominant filmwise condensation on traditional heat exchangers reduces heat transfer efficiency and negatively impacts thermal comfort. As a result, surface modification of heat exchangers is an effective approach for improving condensation heat transfer efficiency and enhancing thermal comfort. This study examines the performance of superhydrophobic (SHP) and quasi-liquid slippery (QLS) coatings on hydrophilic aluminum heat exchangers to improve condensation rate in dehumidification scenarios. Experimental results show that while SHP coating significantly improves sensible heat transfer and excels at enhancing thermal comfort, the flooding issue during the condensation process progressively diminishes its performance, leading to reduced durability for dehumidification. In contrast, QLS coating effectively mitigates the flooding issue, leading to durable condensation performance. The findings demonstrate that SHP and QLS coatings exhibit distinct advantages and limitations under varying operating conditions, providing a basis for selecting the most appropriate coating material according to specific application requirements. • Superhydrophobic (SHP) and quasi-liquid surface (QLS) coatings are fabricated on the heat exchanger surfaces. • The SHP coating is effective in reducing air temperature and improving thermal comfort. • The QLS coating offers balanced performance in both dehumidification and heat transfer. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Heat & Mass Transfer is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 194002979
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
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  Data: Improving indoor thermal comfort and heat transfer efficiency through surface modifications on heat exchangers.
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  Data: <searchLink fieldCode="AR" term="%22Li%2C+Boxuan%22">Li, Boxuan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liang%2C+Dong%22">Liang, Dong</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ma%2C+Wei%22">Ma, Wei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> wmaad@connect.ust.hk</i><br /><searchLink fieldCode="AR" term="%22Yao%2C+Shuhuai%22">Yao, Shuhuai</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> meshyao@ust.hk</i>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Heat+%26+Mass+Transfer%22">International Journal of Heat & Mass Transfer</searchLink>. Oct2026, Vol. 267, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Heat+exchangers%22">Heat exchangers</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+coatings%22">Surface coatings</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+exchanger+efficiency%22">Heat exchanger efficiency</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrophobic+surfaces%22">Hydrophobic surfaces</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+comfort%22">Thermal comfort</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+transfer%22">Heat transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Humidity+control%22">Humidity control</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+preparation%22">Surface preparation</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Air conditioning systems are prevalent in everyday life and serve a crucial role in improving thermal comfort. However, the predominant filmwise condensation on traditional heat exchangers reduces heat transfer efficiency and negatively impacts thermal comfort. As a result, surface modification of heat exchangers is an effective approach for improving condensation heat transfer efficiency and enhancing thermal comfort. This study examines the performance of superhydrophobic (SHP) and quasi-liquid slippery (QLS) coatings on hydrophilic aluminum heat exchangers to improve condensation rate in dehumidification scenarios. Experimental results show that while SHP coating significantly improves sensible heat transfer and excels at enhancing thermal comfort, the flooding issue during the condensation process progressively diminishes its performance, leading to reduced durability for dehumidification. In contrast, QLS coating effectively mitigates the flooding issue, leading to durable condensation performance. The findings demonstrate that SHP and QLS coatings exhibit distinct advantages and limitations under varying operating conditions, providing a basis for selecting the most appropriate coating material according to specific application requirements. • Superhydrophobic (SHP) and quasi-liquid surface (QLS) coatings are fabricated on the heat exchanger surfaces. • The SHP coating is effective in reducing air temperature and improving thermal comfort. • The QLS coating offers balanced performance in both dehumidification and heat transfer. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Heat & Mass Transfer is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.ijheatmasstransfer.2026.128937
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Heat exchangers
        Type: general
      – SubjectFull: Surface coatings
        Type: general
      – SubjectFull: Heat exchanger efficiency
        Type: general
      – SubjectFull: Hydrophobic surfaces
        Type: general
      – SubjectFull: Thermal comfort
        Type: general
      – SubjectFull: Heat transfer
        Type: general
      – SubjectFull: Humidity control
        Type: general
      – SubjectFull: Surface preparation
        Type: general
    Titles:
      – TitleFull: Improving indoor thermal comfort and heat transfer efficiency through surface modifications on heat exchangers.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Li, Boxuan
      – PersonEntity:
          Name:
            NameFull: Liang, Dong
      – PersonEntity:
          Name:
            NameFull: Ma, Wei
      – PersonEntity:
          Name:
            NameFull: Yao, Shuhuai
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          Dates:
            – D: 01
              M: 10
              Text: Oct2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 00179310
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            – Type: volume
              Value: 267
          Titles:
            – TitleFull: International Journal of Heat & Mass Transfer
              Type: main
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