藉田口方法以優化微通道散熱器之設計參數

Optimal Design Parameters of Micro-channel Heat Sink by Using Taguchi Method

鄧雄山(Hung-Son Dang)

指導教授 ： 許政行

中原大學/工學院/機械工程研究所/碩士(2013年)

https://doi.org/10.6840/CYCU.2013.00169

摘要

近年來，在電子科技領域上，對於更小的機構尺寸、更高的功率及更快的處理能力的需求逐漸上升，也因此吸引了科學家及工程師們在微流道散熱器相關領域的研究，特別重視在提升其熱傳效率方面的研發。
為了增加熱傳效率、減少參數數目及將壓降最小化，本研究探討矽基之微流道散熱熱器模組之熱傳效應，其中微流道之流道高度Hc (A)、流道寬度Wc (B)、散熱器底板之厚度δ_b (C)、階梯高度Ho (D)及突擴長度Lo (E)為影響微流道散熱器模效益組之控制參數。
所選擇之參數以三水準模式套用在相對應的田口直交表內，配合計算流體力學軟體ANSYS Fluent 之計算求得統御方程式的數值解，以預測流場的流動、熱傳效應及相關的熱物理現象。數值模擬軟體搭配田口方法可達到微流道參數最佳化的目的，其中最小化壓降的因子組合為A2B3C3D3E3。此一組合結果也與使用多變數統計方法(ANOVA)的分析有相同的結論，而所得到的最小之壓降值為 。 至於達到最小化熱阻之最佳因子組合則為A2B2C2D2E1，其熱阻值為 。
本論文所得降低壓降之最佳因子組合，和其他相關之研究結論吻合，而在流道出口有擴大設計和無擴大設計所呈現的壓降之比較上，流道出口有擴大設計之壓降比無擴大設計之壓降降低了 。

關鍵字

田口方法 ； 微流道散熱器 ； 最佳因子設計

並列摘要

Electronic devices, with the demands of customers in the recent years, are requirements of smaller dimensions, higher power, and faster processing of devices have attracted scientists and engineers to investigate the heat transfer of the devices.
To increase heat transfer rate, reduce number of parameters, and minimize pressure drop, a study on a silicon Micro-channel heat sink model was carried out. The effect of the channel height Hc (A), the channel width Wc (B), the thickness of the substrate δ_b (C), the height of the enlarged of the channel Ho (D), the length of the enlarged of channel Lo (E) was selected to investigate on the performance of the micro-channel heat sink.
An orthogonal array (OAs), which is set in three-level model, was used to arrange experimental plan for above factors. Computational Fluid Dynamics (CFD) (ANSYS Fluent) is the science of predicting fluid flow, heat transfer, chemical reaction and related phenomena by solving governing equations numerically, and in association with the Taguchi method, parameter optimization of the micro-channel heat sink was employed. The optimum combination condition, which may be used to reduce energy consumption and pollutant emission for the pressure drop of the micro-channel, was A2B3C3D3E3. The obtained results were confirmed by the statistical analytic method (ANOVA), and it was shown that the minimum pressure drop achieved was 13.71 kPa.
For the case of minimizing thermal resistance, the obtained results was A2B2C2D2E1, and it was shown that the minimum thermal resistance achieved was 0.13 C/Wm2.
For all cases of the effects of changing design parameters in this study, it was found that a good agreement was achieved for the comparison of the minimum pressure drop of the micro-channel with other researches without the enlarged design. Moreover, with the enlarged designed at the outlet of the channel in the present study, the minimum pressure drop was 10.73% smaller than the channel without enlarged.

並列關鍵字

Taguchi method ； Micro-channel heat sink ； Optimum parameter design

參考文獻

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