IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v18y2025i15p3938-d1708481.html
   My bibliography  Save this article

Pool Boiling Heat Transfer of Ethanol on Surfaces with Minichannels

Author

Listed:
  • Robert Pastuszko

    (Faculty of Mechatronics and Mechanical Engineering, Kielce University of Technology, Al. Tysiąclecia P.P. 7, 25-314 Kielce, Poland)

Abstract

In this paper, the pool boiling of ethanol was analyzed. The experiments were carried out at atmospheric pressure. Heat transfer surfaces in the form of deep minichannels were made of copper. The channels with a depth of 0.2 to 0.5 mm were milled in parallel. The width of the minichannels was 0.6–1.2 mm, and the depth was 5.5, 6, and 10 mm. The highest heat transfer coefficient, 52 kW/m 2 K, was achieved for the minichannels with a depth of 6 mm and a width of 0.8 mm. The maximum heat flux of 953 kW/m 2 was produced using minichannels 5.5 mm deep and 0.5 mm wide. An over threefold increase in the heat transfer coefficient and over a twofold increase in the maximum heat flux in relation to the plain surface were obtained. In the heat flux range 21.2–1035 kW/m 2 , the influence of channel width and depth on the heat exchange process was determined. The diameters of the detaching vapor bubbles were determined on the experimental setup using a high-speed camera. An analytical model was developed to determine the diameter of the departing bubble for the analyzed enhanced surfaces. The model correctly represented the changes in bubble diameter with increasing heat flux.

Suggested Citation

  • Robert Pastuszko, 2025. "Pool Boiling Heat Transfer of Ethanol on Surfaces with Minichannels," Energies, MDPI, vol. 18(15), pages 1-25, July.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:15:p:3938-:d:1708481
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/18/15/3938/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/18/15/3938/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Wu, Zan & Cao, Zhen & Sundén, Bengt, 2019. "Saturated pool boiling heat transfer of acetone and HFE-7200 on modified surfaces by electrophoretic and electrochemical deposition," Applied Energy, Elsevier, vol. 249(C), pages 286-299.
    2. Robert Kaniowski & Robert Pastuszko & Egidijus Dragašius & Saulius Baskutis, 2023. "Pool Boiling of Ethanol on Copper Surfaces with Rectangular Microchannels," Energies, MDPI, vol. 16(23), pages 1-19, December.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Robert Kaniowski & Sylwia Wciślik, 2025. "Thermal Performance Enhancement in Pool Boiling on Copper Surfaces: Contact Angle and Surface Tension Analysis," Energies, MDPI, vol. 18(17), pages 1-20, August.
    2. Li, Wei & Dai, Renkun & Zeng, Min & Wang, Qiuwang, 2020. "Review of two types of surface modification on pool boiling enhancement: Passive and active," Renewable and Sustainable Energy Reviews, Elsevier, vol. 130(C).
    3. Ma, Yu & Bao, Yuchen & Li, Ji, 2025. "Heat transfer dependence of power usage effectiveness of an augmented two-phase immersion cooling system for high-power servers," Energy, Elsevier, vol. 323(C).
    4. Yao, Shuting & Wang, Jiansheng & Liu, Xueling, 2021. "Role of wall-fluid interaction and rough morphology in heat and momentum exchange in nanochannel," Applied Energy, Elsevier, vol. 298(C).
    5. Sun, Yalong & Tang, Yong & Zhang, Shiwei & Yuan, Wei & Tang, Heng, 2022. "A review on fabrication and pool boiling enhancement of three-dimensional complex structures," Renewable and Sustainable Energy Reviews, Elsevier, vol. 162(C).
    6. Tang, Heng & Xia, Liangfeng & Tang, Yong & Weng, Changxing & Hu, Zuohuan & Wu, Xiaoyu & Sun, Yalong, 2022. "Fabrication and pool boiling performance assessment of microgroove array surfaces with secondary micro-structures for high power applications," Renewable Energy, Elsevier, vol. 187(C), pages 790-800.

    More about this item

    Keywords

    ;
    ;
    ;
    ;

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:18:y:2025:i:15:p:3938-:d:1708481. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.