Investigation of a multiple-vibrating fan system for electronics cooling

The previous study presented a novel multiple-vibrating fan cooling system actuated by both the piezoelectric (PZT) effect and magnetic force. The thermal performance of the system was demonstrated by checking the temperature drop of the thermocouples adhered to the fin surface. In this study, the convection heat transfer coefficient of an internal multiple-vibrating fan cooling system was calculated by simulation model to verify the accuracy of the theoretical model. Furthermore, the applications of multiple-vibrating fan cooling systems were demonstrated by an external multiple-vibrating fan cooling system, and a T-shape multiple-vibrating fan cooling system. The experimental result showed that the external multiple-vibrating fan cooling system consuming 0.086W, and was able to decrease the core temperature of dummy heater B dissipating 25W from 110.1°C to 80.5°C while the ambient temperature was 27.4°C. The T-shape multiple-vibrating fan cooling system consuming 0.15W, was able to decrease the core temperature of dummy heater B dissipating 25W from 86.9°C to 55.6°C while the ambient temperature was 27.4°C.