| Project/Area Number |
15H06501
|
|---|
| Research Category |
Grant-in-Aid for Research Activity Start-up
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Thermal engineering
|
|---|
| Research Institution | Nagasaki University |
|---|
Principal Investigator |
KONDOU Chieko 長崎大学, 工学研究科, 准教授 (50752870)
|
|---|
| Project Period (FY) |
2015-08-28 – 2017-03-31
|
| Project Status |
Completed (Fiscal Year 2016)
|
| Budget Amount *help |
¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
|
|---|
| Keywords | 低GWP冷媒 / 電子機器冷却 / 超親水 / レーザ加工 / 沸騰冷却 / CPU冷却器 / 超親水面 / CPU冷却 / 熱マネージメント / 高集積サーバ冷却 / 半導体冷却 / パワーモジュール冷却 / 相変化型オンチップ冷却器 |
|---|
| Outline of Final Research Achievements |
With rapid development of electronic devices, their internal heat generation become significantly denser. For the heat dissipation performance improvement in limited installation spaces, passive two-phase cooling technique using water is being applied. Using refrigerants is advantageous in many aspects. In this study, a gravity-driven cooling circuit using R1234ze(E) and R1234ze(Z) are experimentally investigated. The well-known hysteresis of boiling inception was confirmed but negligible with R1234ze(E) and R1234ze(Z). The experimental circuit successfully kept the heating block temperature below 80 °C at heat fluxes up to 1250 and 1110 kWm-2 with R1234ze(E) and R1234ze(Z), respectively. Furthermore, by using a LISS boiling surface, the heat flux was extended to 1400 and 1350 kWm-2 in R1234ze(E) and R1234ze(Z). The experiment demonstrated that using the selected volatile working fluids, instead of water, and the LISS surface can be a beneficial solution for electronic device cooling.
|
