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Pool boiling performance for GaldenR HT 55 subject to smooth, pin fin, and sintered pin fin heat sink.

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Title: Pool boiling performance for GaldenR HT 55 subject to smooth, pin fin, and sintered pin fin heat sink.
Authors: Lin, Yohanne1 (AUTHOR), Wang, Tz-Hau1 (AUTHOR), Wang, Chi-Chuan1,2 (AUTHOR) ccwang@nycu.edu.tw
Source: International Journal of Thermal Sciences. Aug2024, Vol. 202, pN.PAG-N.PAG. 1p.
Subjects: Heat sinks, Nucleate boiling, Ebullition, Heating, Liquid dielectrics, Fins (Engineering), Boiling-points, Heat flux, Heat transfer coefficient
Abstract: The dielectric fluid of GaldenR HT 55 (Perfluoropolyether) is regarded as a potential candidate for two-phase immersion cooling since its boiling point at 1 atm is 55 °C which is quite suitable for electronics cooling. The fluid is of special interest since the main vender of dielectric fluid will no longer produce FGAS after 2024. However, very rare nucleate boiling performance data for HT55 were reported in the literature. The objective of this study aims to provide nucleate boiling performance data for various heat sinks applicable for nucleate boiling. The test samples include a smooth reference surface (#1), 2 pin fins (the pin diameters are 1 mm (#2) and 2 mm (#3), and 3 pin fin with various sintered coatings (powder size: 150–200 μm (#4), 200–250 μm (#5), and 250–350 μm (#6)). Heat flux spans from 80 to 600 kW/m2. HTC for small pin fin (#2) is marginally higher than that of smooth surface, and large pin fin (#3) shows about 40 % enhancement compared to smooth surface at 140 kW/m2. HTCs for sintered pin fins are much higher than those of pin fin or smooth surface with approximately 90–95 % enhancement relative to the smooth surface at low heat flux. The visual observations indicate that sample #6 yields the largest bubble departure diameter and departure frequency. Yet bubble generations are especially pronounced on top of the pin fin. The CHF of the tested surfaces are following the sequence: #5 > #6 > #4 > #3 > #2 > #1. The sample #5 contains a CHF over 600 kW/m2 which is about four times higher than that of the smooth surface. • Pool boiling performance for six heat sinks subject a dielectric fluid of GaldenR HT 55. • Test samples are a smooth surface (#1), 2 pin fins, and 3 pin fin with various sintered coatings. • The coating of powder size: 150–200 μm (#4), 200–250 μm (#5), and 250–350 μm (#6)). • HTCs for sintered pin fins exceed pin fin or smooth surface by 90–95 %. • The CHF sequence: #5 > #6 > #4 > #3 > #2 > #1. The CHF of sample #5 is 4 times #1. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Thermal Sciences is the property of Elsevier B.V. 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: 176990899
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: Pool boiling performance for GaldenR HT 55 subject to smooth, pin fin, and sintered pin fin heat sink.
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  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Lin%2C+Yohanne%22">Lin, Yohanne</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Tz-Hau%22">Wang, Tz-Hau</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Chi-Chuan%22">Wang, Chi-Chuan</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> ccwang@nycu.edu.tw</i>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Thermal+Sciences%22">International Journal of Thermal Sciences</searchLink>. Aug2024, Vol. 202, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Heat+sinks%22">Heat sinks</searchLink><br /><searchLink fieldCode="DE" term="%22Nucleate+boiling%22">Nucleate boiling</searchLink><br /><searchLink fieldCode="DE" term="%22Ebullition%22">Ebullition</searchLink><br /><searchLink fieldCode="DE" term="%22Heating%22">Heating</searchLink><br /><searchLink fieldCode="DE" term="%22Liquid+dielectrics%22">Liquid dielectrics</searchLink><br /><searchLink fieldCode="DE" term="%22Fins+%28Engineering%29%22">Fins (Engineering)</searchLink><br /><searchLink fieldCode="DE" term="%22Boiling-points%22">Boiling-points</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+flux%22">Heat flux</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+transfer+coefficient%22">Heat transfer coefficient</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The dielectric fluid of GaldenR HT 55 (Perfluoropolyether) is regarded as a potential candidate for two-phase immersion cooling since its boiling point at 1 atm is 55 °C which is quite suitable for electronics cooling. The fluid is of special interest since the main vender of dielectric fluid will no longer produce FGAS after 2024. However, very rare nucleate boiling performance data for HT55 were reported in the literature. The objective of this study aims to provide nucleate boiling performance data for various heat sinks applicable for nucleate boiling. The test samples include a smooth reference surface (#1), 2 pin fins (the pin diameters are 1 mm (#2) and 2 mm (#3), and 3 pin fin with various sintered coatings (powder size: 150–200 μm (#4), 200–250 μm (#5), and 250–350 μm (#6)). Heat flux spans from 80 to 600 kW/m2. HTC for small pin fin (#2) is marginally higher than that of smooth surface, and large pin fin (#3) shows about 40 % enhancement compared to smooth surface at 140 kW/m2. HTCs for sintered pin fins are much higher than those of pin fin or smooth surface with approximately 90–95 % enhancement relative to the smooth surface at low heat flux. The visual observations indicate that sample #6 yields the largest bubble departure diameter and departure frequency. Yet bubble generations are especially pronounced on top of the pin fin. The CHF of the tested surfaces are following the sequence: #5 > #6 > #4 > #3 > #2 > #1. The sample #5 contains a CHF over 600 kW/m2 which is about four times higher than that of the smooth surface. • Pool boiling performance for six heat sinks subject a dielectric fluid of GaldenR HT 55. • Test samples are a smooth surface (#1), 2 pin fins, and 3 pin fin with various sintered coatings. • The coating of powder size: 150–200 μm (#4), 200–250 μm (#5), and 250–350 μm (#6)). • HTCs for sintered pin fins exceed pin fin or smooth surface by 90–95 %. • The CHF sequence: #5 > #6 > #4 > #3 > #2 > #1. The CHF of sample #5 is 4 times #1. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Thermal Sciences is the property of Elsevier B.V. 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.ijthermalsci.2024.109090
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Heat sinks
        Type: general
      – SubjectFull: Nucleate boiling
        Type: general
      – SubjectFull: Ebullition
        Type: general
      – SubjectFull: Heating
        Type: general
      – SubjectFull: Liquid dielectrics
        Type: general
      – SubjectFull: Fins (Engineering)
        Type: general
      – SubjectFull: Boiling-points
        Type: general
      – SubjectFull: Heat flux
        Type: general
      – SubjectFull: Heat transfer coefficient
        Type: general
    Titles:
      – TitleFull: Pool boiling performance for GaldenR HT 55 subject to smooth, pin fin, and sintered pin fin heat sink.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Lin, Yohanne
      – PersonEntity:
          Name:
            NameFull: Wang, Tz-Hau
      – PersonEntity:
          Name:
            NameFull: Wang, Chi-Chuan
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          Dates:
            – D: 01
              M: 08
              Text: Aug2024
              Type: published
              Y: 2024
          Identifiers:
            – Type: issn-print
              Value: 12900729
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            – Type: volume
              Value: 202
          Titles:
            – TitleFull: International Journal of Thermal Sciences
              Type: main
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