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Experimental study on enhanced heat transfer using TiO2–ethylene glycol–water nanofluid in a double-pipe heat exchanger.

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Title: Experimental study on enhanced heat transfer using TiO2–ethylene glycol–water nanofluid in a double-pipe heat exchanger.
Authors: Song, Jinwei1 (AUTHOR), Li, Long1 (AUTHOR), Xu, Zuo1 (AUTHOR), Jiang, Weixue1,2,3 (AUTHOR) jiangweixue@yzu.edu.cn, Li, Yanjun1,4 (AUTHOR), Yuan, Qing2 (AUTHOR), Yang, Liu5 (AUTHOR), Li, Shuhong5 (AUTHOR), Jin, Xiansong6 (AUTHOR), Yuan, Jie6 (AUTHOR)
Source: Journal of Thermal Analysis & Calorimetry. Jan2026, Vol. 151 Issue 1, p959-975. 17p.
Subjects: Heat transfer, Heat exchangers, Empirical research, Colloidal stability, Channel flow, Nusselt number, Ethylene glycol, Nanofluids
Abstract: Nanofluids demonstrate significant application potential in the energy and chemical engineering fields due to their unique heat transfer properties. This study employed a two-step method to prepare TiO2 nanofluids using an ethylene glycol–water mixture as the base fluid. The optimal concentration of 0.5 mass%, which exhibited the best dispersion stability as determined by absorbance measurements, was selected for experimental investigation of heat transfer performance in a hollow spiral double-tube heat exchanger. The heat transfer coefficient, heat transfer rate, and Nusselt number (Nu) were analyzed. Experimental results confirmed the reliability of the system, showing a deviation of less than 10% in the heat transfer rate between the water side and the nanofluid side. Within the temperature range of 303 K–328 K, the addition of TiO2 nanoparticles significantly enhanced the heat transfer coefficient. Conversely, a reduction in the heat transfer coefficient was observed in the lower temperature range of 263 K–283 K. Meanwhile, the incorporation of TiO2 nanoparticles led to an increase in the Nusselt number across the tested conditions. The motion and heat transport behavior of nanoparticles within the spiral flow channel were further examined from a microscopic perspective. This work provides experimental evidence and fundamental data supporting the engineering application of TiO2–ethylene glycol nanofluids in hollow spiral double-tube heat exchangers. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Thermal Analysis & Calorimetry is the property of Springer Nature 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: 191658450
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
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  Data: Experimental study on enhanced heat transfer using TiO<subscript>2</subscript>–ethylene glycol–water nanofluid in a double-pipe heat exchanger.
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  Data: <searchLink fieldCode="AR" term="%22Song%2C+Jinwei%22">Song, Jinwei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Long%22">Li, Long</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Zuo%22">Xu, Zuo</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jiang%2C+Weixue%22">Jiang, Weixue</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<i> jiangweixue@yzu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Li%2C+Yanjun%22">Li, Yanjun</searchLink><relatesTo>1,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yuan%2C+Qing%22">Yuan, Qing</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Liu%22">Yang, Liu</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Shuhong%22">Li, Shuhong</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jin%2C+Xiansong%22">Jin, Xiansong</searchLink><relatesTo>6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yuan%2C+Jie%22">Yuan, Jie</searchLink><relatesTo>6</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Thermal+Analysis+%26+Calorimetry%22">Journal of Thermal Analysis & Calorimetry</searchLink>. Jan2026, Vol. 151 Issue 1, p959-975. 17p.
– Name: Subject
  Label: Subjects
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  Data: <searchLink fieldCode="DE" term="%22Heat+transfer%22">Heat transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+exchangers%22">Heat exchangers</searchLink><br /><searchLink fieldCode="DE" term="%22Empirical+research%22">Empirical research</searchLink><br /><searchLink fieldCode="DE" term="%22Colloidal+stability%22">Colloidal stability</searchLink><br /><searchLink fieldCode="DE" term="%22Channel+flow%22">Channel flow</searchLink><br /><searchLink fieldCode="DE" term="%22Nusselt+number%22">Nusselt number</searchLink><br /><searchLink fieldCode="DE" term="%22Ethylene+glycol%22">Ethylene glycol</searchLink><br /><searchLink fieldCode="DE" term="%22Nanofluids%22">Nanofluids</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Nanofluids demonstrate significant application potential in the energy and chemical engineering fields due to their unique heat transfer properties. This study employed a two-step method to prepare TiO2 nanofluids using an ethylene glycol–water mixture as the base fluid. The optimal concentration of 0.5 mass%, which exhibited the best dispersion stability as determined by absorbance measurements, was selected for experimental investigation of heat transfer performance in a hollow spiral double-tube heat exchanger. The heat transfer coefficient, heat transfer rate, and Nusselt number (Nu) were analyzed. Experimental results confirmed the reliability of the system, showing a deviation of less than 10% in the heat transfer rate between the water side and the nanofluid side. Within the temperature range of 303 K–328 K, the addition of TiO2 nanoparticles significantly enhanced the heat transfer coefficient. Conversely, a reduction in the heat transfer coefficient was observed in the lower temperature range of 263 K–283 K. Meanwhile, the incorporation of TiO2 nanoparticles led to an increase in the Nusselt number across the tested conditions. The motion and heat transport behavior of nanoparticles within the spiral flow channel were further examined from a microscopic perspective. This work provides experimental evidence and fundamental data supporting the engineering application of TiO2–ethylene glycol nanofluids in hollow spiral double-tube heat exchangers. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Thermal Analysis & Calorimetry is the property of Springer Nature 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: 10.1007/s10973-025-15187-4
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 17
        StartPage: 959
    Subjects:
      – SubjectFull: Heat transfer
        Type: general
      – SubjectFull: Heat exchangers
        Type: general
      – SubjectFull: Empirical research
        Type: general
      – SubjectFull: Colloidal stability
        Type: general
      – SubjectFull: Channel flow
        Type: general
      – SubjectFull: Nusselt number
        Type: general
      – SubjectFull: Ethylene glycol
        Type: general
      – SubjectFull: Nanofluids
        Type: general
    Titles:
      – TitleFull: Experimental study on enhanced heat transfer using TiO2–ethylene glycol–water nanofluid in a double-pipe heat exchanger.
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            NameFull: Song, Jinwei
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            NameFull: Li, Long
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            – D: 01
              M: 01
              Text: Jan2026
              Type: published
              Y: 2026
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