藉由田口方法以優化步階微流道散熱器之設計參數

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

黃翔楷(Hsiang-Kai Huang)

指導教授 ： 許政行

中原大學/工學院/機械工程研究所/碩士(2014年)

https://doi.org/10.6840/cycu201400561

摘要

隨著現今的科技日益進步，製程及儀器也更加的精細，因此內部產生的熱通量也隨之提升，是以對於高效率散熱系統的需求也跟著增加。微流道是目前體積小又具有高散熱效率的冷卻技術之一。
本文利用ANSYS Fluent軟體搭配田口方法，模擬分析微流道散熱座，找到最小壓力降及最小熱阻。並探討了幾個影響壓力降及熱阻之因子，其中包含了流道形狀、流道入口高度(H_c)、流道入口寬度(W_c)、基板厚度(δ_b)、階高度(H_0)及跨距(L_0)。
從多次的實驗中，最小壓力降之最佳因子組合為A1-B3-C2-D1-E3-F1，壓力降約為6.251kPa，相較於原始設計6.688kPa比起來，大約降低了6.5%。其中，微流道之入口寬度(因子C)是對壓力降最具貢獻，其次是入口高度(因子B)。
最小熱阻值之最佳因子組合為A2-B1-C1-D3-E1-F3，熱阻約為1.4×〖10〗^(-5) K〖 m〗^2 W^(-1)，相較於原始設計熱阻約為1.43×〖10〗^(-5) K〖 m〗^2 W^(-1)，大約降低了0.09%。其中，從望小特性看因子之比較，微流道之入口寬度(因子C)是對熱阻值最具貢獻，其次是跨距(因子F)。

關鍵字

微流道 ； 田口法 ； 微流道壓力降 ； 微流道熱阻

並列摘要

The developing of technology is improved day by day, wherefore the process and machines will be more accurate and precise, and the more the inner heat flux generated, the higher required efficiency for cooling. The micro-channel is the one of the high efficient cooling technologies with small size.
In this case, the software ANSYS Fluent and Taguchi method are used to simulates and analyze the micro-channel heat sink model to find out the minimum pressure drop and the minimum thermal resistance, and discussions are made for the few factors of pressure drop and thermal resistance such as the shape of channel, the height of channel inlet (H_c), the width of channel inlet (W_c), the thickness of basic (δ_b), the height of stage (H_0) and Pitch(L_0).
Considering the cases of the pressure drop, we obtain an optimal factor combination was A1-B3-C2-D1-E3-F1, and it means the minimum pressure drop is 6.251kPa. Comparing with the pressure drop of original design (6.688kPa), the reduction in pressure drop is 6.5 percent. And the most dominant factor contributing to the pressure drop is the width of micro-channel inlet (factor C), with the height of channel inlet (factor B) being the next.
For the cases of the thermal resistance, the obtained result was A2-B1-C1-D3-E1-F3, and it said that the minimum thermal resistance was 1.4×〖10〗^(-5) K〖 m〗^2 W^(-1). Comparing with the thermal resistance of original design (1.43×〖10〗^(-5) K〖 m〗^2 W^(-1)), it reduces 0.09 percentages. And the priority of factors with the thermal resistance is the width of micro-channel inlet (factor C), then Pitch (factor F).

並列關鍵字

Micro-channel pressure drop ； Micro-channel ； Taguchi Method ； Micro-channel thermal resistance

參考文獻

【9】 楊紹韡, “磁流變制動器效能分析,”中原大學機械工程學系碩士學位論文,2013

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