| Project/Area Number |
25889027
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Naval and maritime engineering
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| Research Institution | Tokyo University of Marine Science and Technology |
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Principal Investigator |
JIGE Daisuke 東京海洋大学, 海洋科学技術研究科, 助教 (30708368)
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| Project Period (FY) |
2013-08-30 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | 扁平多孔管 / ミニチャンネル / 沸騰熱伝達 / 伝熱促進 / 蒸発熱伝達 / 熱工学 / 熱交換器 / 熱伝達 |
|---|
| Outline of Final Research Achievements |
The flow boiling heat transfer and frictional pressure drop characteristics of a refrigerant R32 in horizontal multiport tubes with circular, rectangular and triangular mini-channels are investigated experimentally. The effect of channels geometry on the frictional pressure drop and boiling heat transfer characteristics were clarified. The boiling heat transfer coefficient of rectangular channels increased with decreasing hydraulic diameter. The heat transfer coefficients of triangular and rectangular channels were found to be higher than those of circular channels at low mass velocities and low vapor qualities. The effect of channel geometries on enhancement of boiling heat transfer was small at high mass velocities and in the high vapor quality region. The dryout qualities of rectangular channels were lower than those of circular channels, and decreased with decreasing the channels size.
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