2012 Fiscal Year Final Research Report
Boiling Heat Transfer in Small FlowChannels and its Enhancement Mechanism
| Project/Area Number |
22560201
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Kyushu University |
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Principal Investigator |
MORI Hideo 九州大学, 大学院・工学研究院, 教授 (70150505)
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| Co-Investigator(Renkei-kenkyūsha) |
KARIYA Keishi 九州大学, 大学院・工学研究院, 助教 (80551895)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 微細流路 / 沸騰熱伝達 / 伝熱促進 |
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| Research Abstract |
Experiments were performed on two-phase flow pattern, boiling heat transfer and pressure drop of a refrigerant R410A flowing vertically upward and downward, and horizontally in small circular, rectangular and triangular tubes with hydraulic diameter of about 1 mm, and their characteristics were clarified. In small flow channels, enhancement of heat transfer was realized mainly in slug flow at low mass flux and low quality, in which thickness of liquid film around vapor plug was very thin, resulting in good heat transfer at low heat flux.
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