碩士 / 國立高雄應用科技大學 / 機械與精密工程研究所 / 100 / This study investigated thermal performance of two typical types of heat sink cooled with a digit-like piezofan under several configurations. The present piezofans were operated at 50 Vpp with individual frequency. Effects including heat sink type and orientations, fan blade materials (mylar、Al、Stainless steel) and size, as well as fan locations were tested.
It can be observed that piezofans with metal blade usually have a higher frequency but less fan amplitude than polymer blade does. Besides, thermal performance of a heat sink with a piezofan having wider digit-like blade is always better than that with a piezofan having thinner digit-like blade under similar operation conditions. The heat transfer enhancement for a heat sink with a piezofan having wider blade is higher than that having thinner blade by 10% - 50% depending on operation conditions. In addition, the thermal resistance reduction was not evident for a horizontal piezofan with mylar blade regardless of the fan location. However, the thermal resistance reduction is more notable for a horizontal piezofan with metal blade. Among all test conditions in the study, the heat transfer enhancement ranges from 1.1 to 3.93 and the thermal resistance reduction ranges from 1% to 75% compared with corresponding results obtained under natural convection condition.
| Identifer | oai:union.ndltd.org:TW/100KUAS8693048 |
| Creators | Jhih-Zong Syu, 徐志宗 |
| Contributors | Jin-Cherng Shyu, 徐金城 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 86 |
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