2013 Fiscal Year Final Research Report
On mechanism of microbubble emission boiling and the application for high heat flux cooling technology
| Project/Area Number |
23560246
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Thermal engineering
|
|---|
| Research Institution | Tokyo University of Science, Yamaguchi |
|---|
Principal Investigator |
SUZUKI Koichi 山口東京理科大学, 工学部, 教授 (10089378)
|
|---|
| Project Period (FY) |
2011 – 2013
|
| Keywords | サブクール沸騰 / 気泡微細化沸騰 / 高熱流束 / パワーエレクトロニクス / 沸騰冷却 / 不凍液媒体 / マイクロチャンネル / 気液界面 |
|---|
| Research Abstract |
A subcooled pool boiling has been performed for the purpose of developing high heat flux cooling technology. Microbubble emission boiling (MEB) has occurred for a mixture of anti-freezing liquid and water. The heat flux increases higher than the critical heat flux (CHF). In the boiling of water under the pressurized condition of 0.1MPa in gage for an example, MEB occurs and the heat flux increases higher than the CHF. In subcooled flow boiling in a microchannel, the vapor fills whole of the channel and the boiling turns to film boiling. These experimental results give effective information for the practical cooling technology.
In subcooled pool boiling of water in an acoustic field, MEB has been observed at frequency of 500Hz. According to the PIV analysis of microbubbles in MEB, the subcooled liquid has been observed to flow into the heating surface. The experimental results give the mechanism of MEB and solid-liquid contact.
|
