碩士 / 國立臺北科技大學 / 機電整合研究所 / 102 / This study investigated three dimensional micro-channels heat sink integrated with micro jets. The working fluid was introduced to a 12×14 mm2 heated surface, which had 11 micro-channels. Each channel was 0.6 mm wide, 0.8 mm high, and 12 mm in length. Micro-fins of 0.3 mm in height, 0.2 mm in width, and 12 mm in length was made on the bottom of each channel. Hole of 0.4 mm diameter, 0.8 mm depth, and 0.8 mm pitch was drilled from the top of each micro-fin.
In this experimental and numerical study, the working fluid is FC-72. The saturation temperature of cooling device system was set at 30℃and 50℃, and the volume flow rate varied from 100 to 450 ml/min. The experimental results showed that heat transfer performance was enhanced by the three dimensional fins for both single phase and two phase modes. Enhanced flow field disturbance was found from numerical simulation, and reductions in the wall superheat required to initiate boiling were measured with three dimensional micro-fin-channels.
In this study, at the saturation temperature of 30 ℃, and the flow rate of 400 ml/min, the heat sink yields the maximum heat flux of 134 W/cm2, at the saturation temperature of 50 ℃, and the flow rate of 400 ml/min , the heat sink yields the lowest thermal resistance of 0.0768K / W.
| Identifer | oai:union.ndltd.org:TW/102TIT05651055 |
| Date | January 2014 |
| Creators | Jing-Kuang Yang, 楊璥光 |
| Contributors | 呂志誠 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 103 |
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