| Project/Area Number |
25289047
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Thermal engineering
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| Research Institution | Japan Atomic Energy Agency |
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Principal Investigator |
HIDEKI TATSUMOTO 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 J-PARCセンター, 研究副主幹 (70391331)
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| Co-Investigator(Kenkyū-buntansha) |
SHIRAI YASUYUKI 京都大学, エネルギー科学研究科, 教授 (60179033)
NARUO YOSHIHIRO 宇宙航空研究開発機構, 宇宙科学研究所, 助教 (70150050)
SHIOTSU MASAHIRO 京都大学, エネルギー科学研究科, 名誉教授 (20027139)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2014: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
Fiscal Year 2013: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
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| Keywords | 液体水素 / 熱伝達 / 高温超伝導 / 強制流動 / 定常熱伝達 / 過渡熱伝達 / 高温超電導 / 熱工学 / 流体工学 |
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| Outline of Final Research Achievements |
Liquid hydrogen is expected as a coolant for high-Tc superconductors. We propose forced flow cooling of liquid hydrogen for high-Tc a superconducting device. In this study, we measured transient heat transfer of liquid hydrogen in forced flow using Pt-Co wire heaters inserted into a vertically mounted pipe like Cable-in-Conduit Conductor. In order to obtain data for high flow rates, we have developed a hydrogen loop that was stably operated for a long time using a developed hydrogen pump and the existing experimental apparatuses. We successfully acquired the experimental data for higher flow rate. We derived a transient heat transfer correlation based on our experimental data obtained in a wide range of flow rates, pressures and temperatures. Furthermore, we established a model to estimate properties of the current-sharing ratio among MgB2 and sheath materials. Transient over-critical-current tests were performed on a MgB2 wire cooled by LH2 under magnetic field.
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