| Project/Area Number |
16360099
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Thermal engineering
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| Research Institution | National Institute of Advanced Industrial Science and Technology |
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Principal Investigator |
SHOJI Masahiro National Institute of Advanced Industrial Science and Technology, Energy Technology Research Institute, Invited Research scientist, エネルギー技術研究部門, 連携研究体長 (00011130)
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| Co-Investigator(Kenkyū-buntansha) |
INOUE Mitsuru The University of Tokyo, Assistant, 大学院・工学系研究科, 助手 (30010854)
TAKEMURA Fumio National Institute of Advanced Industrial Science and Technology, Energy Technology Research Institute, Senior Research scientist, エネルギー技術研究部門, 主任研究員 (20313041)
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| Project Period (FY) |
2004 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥15,300,000 (Direct Cost: ¥15,300,000)
Fiscal Year 2005: ¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2004: ¥11,700,000 (Direct Cost: ¥11,700,000)
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| Keywords | Subcooled boiling / Microbubble emission boiling / micro-channels / high-performance cooling device / Micro bubbles / Nonlinear surface energy solutions / 高性能冷却デバイス |
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| Research Abstract |
With the aim of developing high-efficiency and high-performance cooling device, a fundamental researches of microbubble emission pool nucleate boiling and forced convection boiling in micro-mini channels. From the experiment of pool boiling system, it was found that maximum critical heat flux reaches 10 MW/m2 at high subcooling conditions and that the size of bubbles is generally a few tens micron meters and around ten micron meters at high subccolings. From the video observation, it was found that the mechanism of micro-bubble formation relates to the instability of bubble surface. From the flow boiling experiments in micro and mini channels, it was found that when the length of channel is less than a proper length, the pressure loss of flow is low with high heat transfer. It was also found that if we employ a special solute in water such as Butane, it is possible to prohibit the occurrence of dryout or extend the location of dryout. With these experimental researches, it may be said that we can consider the high-efficient, high-performance cooling device by utilizing microbubble emission boiling and micro-mini channels.
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