- 學位論文
具渦旋結構散熱板之數值模擬分析
Numerical Simulation of Cold-Plate with Swirling Cavities
摘要
近年來，CPU效能不斷上升，電腦的空間被壓縮的越來越小，發展體積小和高散熱效率的水冷散熱塊已變成一種趨勢。在王逸彬(2007)的論文中提到，水冷渦旋流道散熱塊的效率比市售大多數的散熱塊的效率好上許多，且體積較小。在論文的結論與建議的部分也提到未來可以減少渦旋腔數目，放大渦旋腔直徑，降低壓差，達到更好的效果。本研究延續王逸彬的研究，以數值模擬的方式，分析渦旋腔數目、渦旋腔直徑、基板厚度及熱源面積變化時對熱阻、總熱傳係數及入出水口壓差的影響。 本文首先回顧過去渦旋流道相關的研究論文，並解釋計算熱阻、總熱傳係數的公式和數值模擬相關的理論，接著說明數值模擬的過程及數值模擬的相關設定，跟著分析數值模擬的結果，探討四個變因對熱阻、總熱傳係數及壓差的影響。最後，選出一組較佳的設計作不同流量的深入探討。
並列摘要
Recently, high-performance electronic devices generated more heat than former. Mini-channel liquid coolers should be studied, to dissipate heat generated by the high-power electronic devices. In Y.P. Wang’s thesis (2007), it is mentioned that the cold-plate with swirling structure has better heat transfer efficiency and smaller volume than most cold-plates sold in the market by using water as cooling-fluid. The conclusion and suggestion of the thesis instruct that it might lower the pressure drop and get better efficiency to reduce the number and increase the diameter of the swirling chambers. This research continues Y.P. Wang’s one to analyze the effect caused by changing the number of swirling chambers, the diameter of the swirling chambers, the thickness of the base, and the surface area of heat source. Firstly, this thesis reviews the papers about the swirling structure, and explains the correlative theories. Secondly, the thesis accounts for the calculation of the thermal resistance and overall heat transfer coefficient and also explain the theories about numerical simulation. The process and the setting of the numerical simulation are also explained, and then results of the numerical simulation are discussed. Finally, the best case is chosen to be deeply analyzed by using different flow rate.