桌上型電腦冷卻風扇散熱性能之實驗分析 The Experimental Analysis of the Thermal Performance of Cooling Fans in Desktop Computer

Abstract

The thermal and noise performance of the cooling fans in desktop computer at various series arrangement was analyzed by employing the experimental method. In the aspect of thermal performance experiment, the standard methods of Air Movement and Control Association 210-85 was used. In the aspect of noise experiment, the decibel(db) values in semi-anechoic room were measured. The choice of parameters in this study are speed of fans, series type and fans pitch. The best series type of fans can be obtained according to the flow rate, pressure and noise.

From the present results, the larger flow rate, pressure and noise by triple fans was obtained when the fan diameter is 6cm and the fans pitch are 0cm. From the consideration between noise and cost, the fan diameter of 8cm with 3500rpm in series with the fan diameter of 6cm with 5000rpm in the contractive channel at the fan pitch of 2cm has the best cooling effect of desktop computer. From the measuring temperature of CPU, the temperature of CPU has decreased to 39℃ when the contractive series type was used.

 

Key words：cooling fan, in series, heat dissipation, semi-anechoic room, noise, contractive channel