碩士 / 大同大學 / 機械工程學系(所) / 101 / In this study, a heat sink with fixed total fin volume is simulated to pursue the maximum thermal dissipation. The fin can be divided into plate fin and pin fin on a heat sink. The shapes of cross-sectional area for the pin fin are square, circular, equilaterally triangular and rectangular. By setting thermal conductivities of heat sink and fins at first, the thermal dissipation equation of the heat sink can be theoretically derived by inputting parameters including the area of the base, heat transfer coefficient, Biot number, shape parameter, and total volume of fins. Then, the maximum effectiveness can be solved by simulated annealing method from this equation. Furthermore, the optimized dimension of the heat sink can be obtained that contains the fin number, fin length, fin cross section and the lower thermal resistance.
During the computation process, convective effect of the fin tip is neglected. Then the comparison of effectiveness and thermal resistance between plate fin heat sink and pin fins heat sink with four different fin cross-sections is explored with different heat transfer coefficient (natural and forced convection) and various total volumes of fins for the same fin number. Meanwhile, the table of the optimum range of heat sink is supplied as a reference for the design of a heat sink.
| Identifer | oai:union.ndltd.org:TW/101TTU05311016 |
| Date | January 2013 |
| Creators | Chao-Yu Chen, 陳炤宇 |
| Contributors | Hong-Sen Kou, Ji-Jen Lee, 郭鴻森, 李基禎 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 81 |
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