2022 Fiscal Year Final Research Report
Development of a high heat flux cooling system that can maintain a constant temperature even when the amount of heat generated changes
| Project/Area Number |
19K04249
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 19020:Thermal engineering-related
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| Research Institution | National Institute of Technology, Toyama College |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
福江 高志 金沢工業大学, 工学部, 准教授 (80647058)
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| Project Period (FY) |
2019-04-01 – 2023-03-31
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| Keywords | 沸騰伝熱 / 脈流 / 電子機器 / 冷却技術 |
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| Outline of Final Research Achievements |
We have attempted to develop a cooling system that can maintain a constant temperature of electronic devices even if the amount of heat generated fluctuates. When the nucleate boiling phenomenon in the narrow tube was removed by the pulsating flow, it was observed that the bubbles were removed by the pulsating flow. However, while the heat transfer characteristics were improved by about 10% due to the pulsating flow in non-boiling conditions, no effect was observed in nucleate boiling conditions. On the other hand, the bubbles that flowed out to the wide tube part were agitated but did not disappear. The experiment was conducted with water near the nucleate boiling point, and it was found that the shape of the venturi tube and the pressure inside the channel had a large effect.
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| Free Research Field |
熱工学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究で，細管部における流速によって，気泡の成長や離脱半径が変わることを確認できており，管部の流速制御によって沸点が変わり，伝熱面の温度を調整できる可能性が高いことが分かった．また，脈流により非沸騰時には伝熱特性が向上できることが分かった．今後，高熱流束対応の伝熱面の研究や，電子機器の高速化・小型化に伴って高熱流束に対応した液体循環型の冷却システムや，医療機器や高精度計測器などの温度がシステム性能に及ぼす機器の温度が調整できる機器の開発に活かすことができると考えられる．
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