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Effect of honeycomb porous plate on critical heat flux in saturated pool boiling of artificial seawater
http://hdl.handle.net/10131/00012035
http://hdl.handle.net/10131/000120358f6c0600-5df8-41e9-8ad7-caf2802c5bbd
名前 / ファイル | ライセンス | アクション |
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Manuscript_final_1.pdf (2.7 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2018-10-23 | |||||
タイトル | ||||||
タイトル | Effect of honeycomb porous plate on critical heat flux in saturated pool boiling of artificial seawater | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題 | Saturated pool boiling, In-vessel retention, Seawater cooling, Critical heat flux, Honeycomb porous plate, Sea-salt deposition | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
Fogaça, Wilton
× Fogaça, Wilton× Mori, Shoji× Imanishi, Kosuke× Okuyama, Kunito× Piqueira, J.R.C. |
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著者所属 | ||||||
School of Engineering, University of São Paulo | ||||||
著者所属 | ||||||
Department of Chemical Engineering Science, Yokohama National University | ||||||
著者所属 | ||||||
Department of Chemical Engineering Science, Yokohama National University | ||||||
著者所属 | ||||||
Department of Chemical Engineering Science, Yokohama National University | ||||||
著者所属 | ||||||
School of Engineering, University of São Paulo | ||||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | During a severe nuclear power plant accident, the integrity of the reactor pressure vessel must be assured. In response to a possible fuel meltdown, operators of the current generation of nuclear power plants are likely to inject water into the reactor pressure vessel cavity to cool down the reactor vessel wall, preserving its integrity and avoiding leakage of radioactive material. This study considers the use of seawater to flood a reactor pressure vessel cavity combined with the attachment of a honeycomb porous plate (HPP) on the vessel outer wall as a way to improve the safety margins for in-vessel retention of fuel. In long-duration experiments, saturated pool boiling of artificial seawater was performed with an upward-facing plain copper heated surface 30 mm in diameter. The resulting value for critical heat flux (CHF) was 1.6 MW/m2 at atmospheric pressure, a value significantly higher than the CHF obtained when the working fluid was distilled water (1.0 MW/m2). It was verified that sea-salt deposits could greatly improve surface wettability and capillarity, enhancing the CHF. The combination of artificial seawater and an HPP attached to the heated surface improved the boiling heat transfer coefficient and increased the CHF up to 110% (2.1 MW/m2) as compared to distilled water on a bare surface. After the artificial seawater experiments, most of the wall micropores of the HPP were clogged due to sea-salt aggregation on the HPP top and bottom surfaces. Thus, the CHF enhancement observed in this case was attributed mainly to the separation of liquid and vapor phases provided by the HPP channel structure and improvement of surface wettability and capillarity by sea-salt deposition. | |||||
書誌情報 |
International journal of heat and mass transfer 巻 125, p. 994-1002, 発行日 2018-10 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 00179310 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00680396 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1016/j.ijheatmasstransfer.2018.04.101 | |||||
権利 | ||||||
権利情報 | ©2018, Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | |||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
出版者 | ||||||
出版者 | Elsevier Science |