Experimental study of critical heat flux enhancement effect by nanofluid critical heat flux test using wire coated with nanofluid

Hotaka Saito, Shinichi Morooka

    Research output: Contribution to journalArticle

    Abstract

    The critical heat flux (CHF) enhancement effect by nanofluid is widely known, and it is expected that nanofluid can be applied to in-vessel retention (IVR) under severe accident. The purpose of this study is to investigate the mechanism of CHF enhancement by nanofluid. In this study, an atmospheric saturated pool boiling test was performed. TiO2 nanoparticles were used. To observe the boiling phenomenon in nanofluid, a Pt wire was boiled in nanofluid and coated with TiO2 nanoparticles, and the coated wire was tested in pure water. The following conclusions can be obtained from test results: (1) Nucleation site density was decreased using the Pt wire coated with TiO2 nanoparticles. (2) CHF enhancement in this study was about 200%. (3) CHF asymptotically increased with an increase in boiling time in nanofluid. (4) Nucleation site density had a strong effect on CHF enhancement.

    Original languageEnglish
    Pages (from-to)43-49
    Number of pages7
    JournalTransactions of the Atomic Energy Society of Japan
    Volume12
    Issue number1
    DOIs
    Publication statusPublished - 2013

    Fingerprint

    Heat flux
    Wire
    Boiling liquids
    Nanoparticles
    Nucleation
    Accidents
    Water

    Keywords

    • Cavity
    • CHF
    • IVR
    • Nanofluid
    • Pool boiling
    • Wettability

    ASJC Scopus subject areas

    • Nuclear Energy and Engineering
    • Safety, Risk, Reliability and Quality

    Cite this

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    title = "Experimental study of critical heat flux enhancement effect by nanofluid critical heat flux test using wire coated with nanofluid",
    abstract = "The critical heat flux (CHF) enhancement effect by nanofluid is widely known, and it is expected that nanofluid can be applied to in-vessel retention (IVR) under severe accident. The purpose of this study is to investigate the mechanism of CHF enhancement by nanofluid. In this study, an atmospheric saturated pool boiling test was performed. TiO2 nanoparticles were used. To observe the boiling phenomenon in nanofluid, a Pt wire was boiled in nanofluid and coated with TiO2 nanoparticles, and the coated wire was tested in pure water. The following conclusions can be obtained from test results: (1) Nucleation site density was decreased using the Pt wire coated with TiO2 nanoparticles. (2) CHF enhancement in this study was about 200{\%}. (3) CHF asymptotically increased with an increase in boiling time in nanofluid. (4) Nucleation site density had a strong effect on CHF enhancement.",
    keywords = "Cavity, CHF, IVR, Nanofluid, Pool boiling, Wettability",
    author = "Hotaka Saito and Shinichi Morooka",
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    TY - JOUR

    T1 - Experimental study of critical heat flux enhancement effect by nanofluid critical heat flux test using wire coated with nanofluid

    AU - Saito, Hotaka

    AU - Morooka, Shinichi

    PY - 2013

    Y1 - 2013

    N2 - The critical heat flux (CHF) enhancement effect by nanofluid is widely known, and it is expected that nanofluid can be applied to in-vessel retention (IVR) under severe accident. The purpose of this study is to investigate the mechanism of CHF enhancement by nanofluid. In this study, an atmospheric saturated pool boiling test was performed. TiO2 nanoparticles were used. To observe the boiling phenomenon in nanofluid, a Pt wire was boiled in nanofluid and coated with TiO2 nanoparticles, and the coated wire was tested in pure water. The following conclusions can be obtained from test results: (1) Nucleation site density was decreased using the Pt wire coated with TiO2 nanoparticles. (2) CHF enhancement in this study was about 200%. (3) CHF asymptotically increased with an increase in boiling time in nanofluid. (4) Nucleation site density had a strong effect on CHF enhancement.

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    KW - Wettability

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