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Synergy investigations for the thermal transportation performance of a coaxial gravity heat pipe with internally finned in evaporator section.

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Title: Synergy investigations for the thermal transportation performance of a coaxial gravity heat pipe with internally finned in evaporator section.
Authors: Zou, Linjiang1 (AUTHOR), Wang, Fulin1 (AUTHOR), Yan, Dawei1 (AUTHOR) dw9527@ahut.edu.cn, Gu, Mingyan1 (AUTHOR) gumy@ahut.edu.cn, Li, Maomao1 (AUTHOR), Li, Meng1 (AUTHOR), Liu, Miaomiao1 (AUTHOR), Wang, Weiwei1 (AUTHOR)
Source: International Journal of Heat & Mass Transfer. Mar2022, Vol. 184, pN.PAG-N.PAG. 1p.
Subjects: Heat pipes, Gravity, Evaporators, Heat transfer, Nucleate boiling, Thermal resistance
Abstract: • A coaxial gravity heat pipe with internal fins in evaporator section is proposed. • The thermal resistance of CGHP is decreased by 13.43% maximally with internal fins compared to without fins. • The flow pattern and temperature distribution of CGHP obtained from CFD method are analyzed and studied. • The heat transfer performance with down fins n df = 3 is superior than that of other cases. Heat pipe has great potential in the field of building and industrial energy exploitation due to high-efficiency heat transfer capability. In order to enhance the thermo-hydrodynamic performance of a coaxial gravity heat pipe (CGHP), the thermal transport behaviors of CGHP have been fully analyzed. In present research, firstly, the theoretical model and experiment tests of the internal flow and heat transfer of a CGHP is established when it is in a thermo-hydraulically stable operation mode. Subsequently, a coaxial gravity heat pipe was fully investigated to test its effects of thermal transport performance, including input powers, flow velocity, and the number of fins. The results show that mean reductions of overall thermal resistance achieved about 4.93% and 13.43% for fins n f = 4 and n f = 12, respectively. Moreover, the influence of internal fins of evaporator section on the liquid-vapor flow has been comprehensively obtained, including the steam disturbance, generation of bubbles and nucleate boiling. The CFD results reveal that the down fins number n df = 0 causes bubbles to adhere to the evaporator surface, thereby reducing the heat transfer capability, whereas a n df = 3 case causes bubbles to easily depart the evaporator surface, enhancing heat transfer capability. Current theoretical and CFD results agreed well with experimental data within mean error being no more than 10%. [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: 154437439
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Synergy investigations for the thermal transportation performance of a coaxial gravity heat pipe with internally finned in evaporator section.
– Name: Author
  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Zou%2C+Linjiang%22">Zou, Linjiang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Fulin%22">Wang, Fulin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yan%2C+Dawei%22">Yan, Dawei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> dw9527@ahut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Gu%2C+Mingyan%22">Gu, Mingyan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> gumy@ahut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Li%2C+Maomao%22">Li, Maomao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Meng%22">Li, Meng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Miaomiao%22">Liu, Miaomiao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Weiwei%22">Wang, Weiwei</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Heat+%26+Mass+Transfer%22">International Journal of Heat & Mass Transfer</searchLink>. Mar2022, Vol. 184, pN.PAG-N.PAG. 1p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Heat+pipes%22">Heat pipes</searchLink><br /><searchLink fieldCode="DE" term="%22Gravity%22">Gravity</searchLink><br /><searchLink fieldCode="DE" term="%22Evaporators%22">Evaporators</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+transfer%22">Heat transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Nucleate+boiling%22">Nucleate boiling</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+resistance%22">Thermal resistance</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: • A coaxial gravity heat pipe with internal fins in evaporator section is proposed. • The thermal resistance of CGHP is decreased by 13.43% maximally with internal fins compared to without fins. • The flow pattern and temperature distribution of CGHP obtained from CFD method are analyzed and studied. • The heat transfer performance with down fins n df = 3 is superior than that of other cases. Heat pipe has great potential in the field of building and industrial energy exploitation due to high-efficiency heat transfer capability. In order to enhance the thermo-hydrodynamic performance of a coaxial gravity heat pipe (CGHP), the thermal transport behaviors of CGHP have been fully analyzed. In present research, firstly, the theoretical model and experiment tests of the internal flow and heat transfer of a CGHP is established when it is in a thermo-hydraulically stable operation mode. Subsequently, a coaxial gravity heat pipe was fully investigated to test its effects of thermal transport performance, including input powers, flow velocity, and the number of fins. The results show that mean reductions of overall thermal resistance achieved about 4.93% and 13.43% for fins n f = 4 and n f = 12, respectively. Moreover, the influence of internal fins of evaporator section on the liquid-vapor flow has been comprehensively obtained, including the steam disturbance, generation of bubbles and nucleate boiling. The CFD results reveal that the down fins number n df = 0 causes bubbles to adhere to the evaporator surface, thereby reducing the heat transfer capability, whereas a n df = 3 case causes bubbles to easily depart the evaporator surface, enhancing heat transfer capability. Current theoretical and CFD results agreed well with experimental data within mean error being no more than 10%. [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.2021.122312
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Heat pipes
        Type: general
      – SubjectFull: Gravity
        Type: general
      – SubjectFull: Evaporators
        Type: general
      – SubjectFull: Heat transfer
        Type: general
      – SubjectFull: Nucleate boiling
        Type: general
      – SubjectFull: Thermal resistance
        Type: general
    Titles:
      – TitleFull: Synergy investigations for the thermal transportation performance of a coaxial gravity heat pipe with internally finned in evaporator section.
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          Name:
            NameFull: Zou, Linjiang
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            NameFull: Wang, Fulin
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            NameFull: Yan, Dawei
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            NameFull: Gu, Mingyan
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            NameFull: Li, Maomao
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            NameFull: Li, Meng
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            NameFull: Liu, Miaomiao
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            NameFull: Wang, Weiwei
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            – D: 01
              M: 03
              Text: Mar2022
              Type: published
              Y: 2022
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            – Type: issn-print
              Value: 00179310
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              Value: 184
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            – TitleFull: International Journal of Heat & Mass Transfer
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