- 學位論文
LED蒸氣腔體散熱模組
Investigation and Analysis of the Vapor Chamber Cooling module Applied in LED
摘要
近幾年來，LED對於照明之應用日趨重要，而其中急需解決的便是LED散熱問題，由於LED具有省電及壽命長之特性，若能有效改善其散熱問題，將能延長LED的使用壽命、減少能源的損耗。蒸氣腔體乃是在操作時產生沸騰的機制，使熱量能迅速且均勻的擴散來達到散熱和均溫的效果。本研究為證明蒸氣腔體散熱模組能有效解決LED散熱問題，因此設計一套完整的實驗方法，研究自然對流散熱對於蒸氣腔體散熱模組的性能影響，以提供未來對於蒸氣腔體散熱模組進一步的分析與改善。由實驗結果顯示，LED蒸氣腔體散熱模組在90度放置下會有較佳之性能表現。而且蒸氣腔體的擴散熱阻(Spreading Resistance)可以比銅塊及鋁塊降低約20%。且相較於銅塊及鋁塊散熱模組，總熱阻約低13%。雖然由實驗看來，鰭片對流熱阻為影響系統總熱阻之主要因素(約佔70~90%)，但此部份可藉由鰭片尺寸最佳化來加以改善，使蒸氣腔體散熱模組應用於LED散熱上有更佳的效果。
並列摘要
In recent years, LED is becoming more important to the lighting application. And the LED heat dissipation problem is badly in need of solution among them. LED has the characteristic of electricity and longe-lived. If its heat dissipation problem can improve effectively, we can lengthen the service life of LED and loss of the reduction energy. The boiling mechanism appears within the vapor chamber while operating, at the same time it can dissipate heat rapidly and also spread heat evenly to get the result of uniform temperature. In order to prove that the vapor chamber cooling module can solve LED heat dissipation problem effectively in the paper, so there is a set of detailed experiment methods. Study the influence on performance of natural convection heat transfer in order to offer the analysis and improvement of the vapor chamber cooling module in the future. The experimental result shows that the performance of the vapor chamber cooling module applied in LED will be best under 90 degrees. The spreading resistance of the vapor chamber cooling module is lower by about 20% than copper. Seemed by the experiment, natural convection resistance is the principal factor which influences the total resistance of the systwm (about 70% to 90%). But this part can be improving by the optimization of the size of the fin. And it makes that the vapor chamber cooling module applied in LED has the best result.