碩士 / 國立臺北科技大學 / 能源與冷凍空調工程系碩士班 / 105 / The main purpose of this study is to optimize the number and size of fin-cuts on
the heat sink in the natural convective environment using experimental and CFD
simulation methods. With the fixed values of heat sink envelop volume of 10102
mm3, heat dissipation of 10 W, ambient temperature of 30°C, and radiation emissivity of
0.8 for the extruded aluminum with anodize treatment, fins having 0 to 3 cross cuts of 8
different cut widths were numerically simulated. Twenty-five sets of heat sinks are
compared to explore the difference between the designs of the fin profiles for horizontal
heat sinks. Numerical analysis and experimental results show that the bottom center
temperature of the heat sink with fin-cuts is at least 1°C less than the heat sink without
fin-cut, with a maximum temperature difference of about 5°C. A numerical analysis of
the 25 data sets were used to explore the effects of heat transfer area, the ratio of fin cut
width to heat sink length on the thermal resistance of the heat sinks. For the heat sink
with uncut fins, whose heat transfer surface area is 64764 mm2, yielded a thermal
resistance of 3.3 K/W. The CFD analysis results showed that the heat sink having
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triple-cuts of 12 mm cut-width yielded a lower thermal resistance of 2.74 K/W, although
its heat transfer area is only 47376mm
| Identifer | oai:union.ndltd.org:TW/105TIT05703064 |
| Date | January 2017 |
| Creators | YU-HUNG WANG, 王茟弘 |
| Contributors | Liang-Han Chien, 簡良翰 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 67 |
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