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

Hotaka Saito; Shinichi Morooka

doi:10.3327/taesj.J11.054

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

Hotaka Saito, Shinichi Morooka^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	43-49
Number of pages	7
Journal	Transactions of the Atomic Energy Society of Japan
Volume	12
Issue number	1
DOIs	https://doi.org/10.3327/taesj.J11.054
Publication status	Published - 2013

Keywords

Cavity
CHF
IVR
Nanofluid
Pool boiling
Wettability

ASJC Scopus subject areas

Nuclear Energy and Engineering
Safety, Risk, Reliability and Quality

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10.3327/taesj.J11.054

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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",

year = "2013",

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language = "English",

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journal = "Transactions of the Atomic Energy Society of Japan",

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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.

AB - 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.

KW - Cavity

KW - CHF

KW - IVR

KW - Nanofluid

KW - Pool boiling

KW - Wettability

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

Abstract

Keywords

ASJC Scopus subject areas

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