本研究的目標是探討微流道的最佳流道形狀幾何與散熱效能之設計參數,流道選擇碎形微流道設計,目的改善散熱均勻性。探討在不同的流體、流道材質和不同的交互影響下,對微流道散熱效能影響的重要參數,找出其中最佳組合以提高散熱效能。 本文使用ANSYS Fluent 分析軟體做模擬分析,並使用田口方法找出最佳散熱功率之組合因子,且深入探討因子對於本研究的貢獻度,本研究初選的因子有基板材質、入口水力直徑、熱通量、入口流速、流體材質、流道比例,其中以熱通量、入口流速在模擬過程中對整體研究影響最大,貢獻度最高。 在多次模擬實驗中經由田口方法選出底面與雙側面加熱之三面加熱因子組合A2-B1-C3-D1-E3- F3與底面加熱之單面加熱因子組合A2-B1-C3-D1-E3- F1為最佳優化,並以此組合重複4次實驗測得入出口最高平均溫差ΔT為47.528K,進而得知散熱功率為1.7497 W比原始設計提高210%。
The purpose of this study is the thermal uniformity improvement of fractal microchannel by optimizing geometry design parameters and thermal performance parameters. Comparing within different working flow, materials and different shape of channel, the parameters which has influence with thermal performance will be found out, and find out the best combination parameters to improve thermal performance. In this case, the software ANSYS Fluent and Taguchi method are used to simulates and analyze the fractal microchannel to find out the factors combination of the best cooling ability with model, and discussions are made for the few factors such as the baseplate material, entrance hydraulic diameter(Dh),the heat flux(q),the inlet velocity(