A study on post-chf heat transfer at near-critical pressure

Takashi Mawatari, Hideo Mori, Keishi Kariya

研究成果: 会議への寄与タイプ論文

1 引用 (Scopus)

抄録

Supercritical pressurized water cooled reactor (SCWR), which has an once-through water cooled reactor for supplying supercritical pressure steam at high temperature to a turbine system, is one of the next generation reactors for the purpose of improving economic efficiency and safety. In the SCWR system, the water pressure passes through the critical pressure during startup, shutdown and in case of loss of coolant accident (LOCA). In the pressure region slightly below the critical pressure, critical heat flux (CHF) phenomenon tends to occur at relatively low heat flux, and then there is a risk of serious damage to fuel rod due to surface temperature rise. Therefore, it is significant for safety design of the SCWR to clarify characteristics of post-CHF heat transfer in such near-critical pressure region. In this study, experiments on post-CHF heat transfer in vertical upward and downward flows with a circular tube of 4.4mm I.D. were carried out at near-critical pressure condition (reduced pressure range of 0.92 to 0.99) in order to evaluate their characteristics. HCFC22 and HFC134a were used as the test fluid instead of water because of easier handling. Based on obtained experimental data, influences of pressure, mass flux and heat flux conditions on the characteristic of post-CHF heat transfer were clarified, and then the characteristic was classified into two types mainly by mass flux of around 700 kg/(m2·s).

元の言語英語
出版物ステータス出版済み - 1 1 2014
イベント15th International Heat Transfer Conference, IHTC 2014 - Kyoto, 日本
継続期間: 8 10 20148 15 2014

その他

その他15th International Heat Transfer Conference, IHTC 2014
日本
Kyoto
期間8/10/148/15/14

Fingerprint

critical pressure
water cooled reactors
heat flux
heat transfer
Heat transfer
Water cooled reactors
Heat flux
safety
loss of coolant
supercritical pressures
circular tubes
shutdowns
water pressure
supplying
turbines
Mass transfer
accidents
steam
surface temperature
economics

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Condensed Matter Physics

これを引用

Mawatari, T., Mori, H., & Kariya, K. (2014). A study on post-chf heat transfer at near-critical pressure. 論文発表場所 15th International Heat Transfer Conference, IHTC 2014, Kyoto, 日本.

A study on post-chf heat transfer at near-critical pressure. / Mawatari, Takashi; Mori, Hideo; Kariya, Keishi.

2014. 論文発表場所 15th International Heat Transfer Conference, IHTC 2014, Kyoto, 日本.

研究成果: 会議への寄与タイプ論文

Mawatari, T, Mori, H & Kariya, K 2014, 'A study on post-chf heat transfer at near-critical pressure' 論文発表場所 15th International Heat Transfer Conference, IHTC 2014, Kyoto, 日本, 8/10/14 - 8/15/14, .
Mawatari T, Mori H, Kariya K. A study on post-chf heat transfer at near-critical pressure. 2014. 論文発表場所 15th International Heat Transfer Conference, IHTC 2014, Kyoto, 日本.
Mawatari, Takashi ; Mori, Hideo ; Kariya, Keishi. / A study on post-chf heat transfer at near-critical pressure. 論文発表場所 15th International Heat Transfer Conference, IHTC 2014, Kyoto, 日本.
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