碩士 / 國立高雄應用科技大學 / 模具工程系 / 99 / The features of electronic component are “light”, “thin”, “short”, and “small” is the global trend. That is, electronic components are designed toward miniaturization such as laptop, smart phones. Due to the characteristics of piezoelectric fan are small size, ultralight, simple structure, and sensitive response. It is suitable for cooling application in miniaturization electronic components.
The purpose of this study is to explore the heat dissipation efficiency of piezoelectric fan with different type heat sinks by changing the piezoelectric fan height which is relative to four different heat sinks. This study use flow visualization technique (Middle wave infrared), driven by 110V, 60Hz and fix the amplitude range of piezoelectric fan and distance (0.5 mm,1mm,2mm,3mm,4mm,5mm and 7mm) between blade tip and fin side. To examine the piezoelectric fan flow phenomena with single fin, end-slotting plate-fin heat sink, middle-end slotting plate-fin heat sink and center-slotting and end-slotting plate-fin heat sink.
From the fin temperature gradient of infrared image, the empirical results showed the change of slope on the isothermal under the free convection and jet-like flow forced convection. The distance between blade tip and heat sink is getting closer, and the thermal resistance is less. Oppositely, with the distance increased, the thermal resistance is getting upward. Compare to the thermal resistance of non-piezoelectric fan and piezoelectric fan with single fin, it had been found the piezoelectric fan which used in this research can increases the thermal resistance up to four times, and it can be three to five times when using multi-fin. Besides, as piezoelectric fan works with multi-fin and set at the middle, the amplitude covers the most part of heat sink. That could push the air into the heat sink effectively for cooling. Moreover, comparing to the thermal resistances, it found the middle-end slotting plate-fin heat sink acquire the lower thermal resistance.
| Identifer | oai:union.ndltd.org:TW/099KUAS8767032 |
| Date | January 2011 |
| Creators | Liang-I Yen, 顏良益 |
| Contributors | Herchang Ay, 艾和昌 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 78 |
Page generated in 0.0017 seconds