- 期刊
- OpenAccess
個人電腦內CPU之雙風扇散熱器模組之冷卻分析
Cooling Analysis of the CPU Heat Sink with Dual Fan Assemblies in a Personal Computer
摘要
本文以雙風扇引導扇葉氣流，分析個人電腦CPU之散熱效益。針對鰭片的形式、風扇的安裝型式、鰭片是否加裝遮蔽以及遮蔽頂孔大小對鰭片散熱之影響進行探討。鰭片間流場分佈狀況影響鰭片溫度分佈與散熱效益。由分析結果顯示，應避免氣流最短流路之設計，使得鰭片對流散熱效率提升，當鰭片間有良好的氣體流動且較少渦流發生時，會有較佳之散熱效益。風扇安裝位置及扇葉氣流的流動方向改變時，鰭片遮蔽的方式亦不相同，鰭片遮蔽的加裝能充分利用扇葉氣流流經最大的鰭片面積，使其獲得最大的散熱效果，且遮蔽頂孔的大小對散熱效益亦有顯著的影響。本文最後亦以實驗獲取數據並與數值解比較，兩者結果相當接近。
並列摘要
The purpose of the present study is to investigate the temperature field, and velocity profile around the heat sink on PC (Personal Computer) due to the dual fan effect for designing an optimum heat sink assembly. The parameters considered are positions of fan, types of heat sink, cover shroud on heat sink, the top-hole size of shroud. The flow profile between the spacing of fins will affect the temperature distribution for estimating the thermal performance. For different types of heat sink, the results show that some position of fan can reduce vortex, increase the convectional effect and enhance the thermal performance, Different positions of fan will match its respective type of shroud. The size of top-hole of shroud is the key factor to affect the thermal performance of heat sink. The cover shroud on heat sink will induce the direction of airflow through most area of fins and enhance heat dissipation from the hot surface. Finally, the experimentation of the present study is also performed to compare with the numerical solution. It is found that both have good agreement.