A study of heat sink assembling module applied on CPU for desktop PC – using Taguchi method

• Main Authors: Chia-Liang Kao, 高嘉良
• Other Authors: Chao-Ho Hsu
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/43257837328645198871

碩士 === 國立高雄應用科技大學 === 模具工程系碩士班 === 95 === The main objective of this study is to numerically explore the distributions of temperature and velocity of heat sink cooling modules applied on CPU of desktop PC and to design a high performance cooler. First of all, the flow rate of 70 X 70 X 25 mm single-thickness axial fan will be investigated. After that, the whole heat sink cooling module will be investigated and compare to an ideal flow that has equally the same flow rate. Finally, in order to improve the geometrical shape of the cooler, Taguchi method is utilized. Besides, the temperature and wind capacity of fan are considered as performance characteristics. In addition, with the help of widely used commercial CFD code, FLUENT, the flow and temperature field could be visualized. In fan blade design, instead of using NACA airfoil blade, an easy, innovative, and time-saving way has been developed to build a single-thickness blade fan. It has a lower cost of designing and manufacturing the mold. With a 50 W heat source, 3000 rpm rotational speed by default and Orthogonal Array, the factors which affect temperature and flow rate will be investigated to improve the geometrical shape of cooler, as well as lowering the temperature of CPU. The numerical results show that the flow below fan motor remains and this situation could happen to NACA airfoil blade fan as well. Moreover, the flow rate of single-thickness fan is 31% lower than an equal-sized NACA airfoil blade fan. Basically, regardless of how the cooler fins are arranged, the air in the cooler flows from inside to outside. The optimized design cooler could reduce the temperature of CPU by about 0.8℃, the volume of cooler the by 12.0% and the surface area of the cooler by8.5%.