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In this study, a multiple fans system with a piezoelectric actuator (MFPA) was integrated with a vapor chamber. The integrated system was embedded in a micro-computer for its thermal management. The MFPA utilized magnetic repulsive force to transfer power from the piezoelectric actuator to the adjacent passive fans. Models with different fan length, fan pitch and the number of the fans were developed...
In recent years, piezoelectric fans and their feasibility of cooling electronic devices have been widely studied. Nonetheless, there is few study about using piezoelectric fans to generate radial air flow. In this study, a radial multiple fan system (RMFS) was developed for the thermal management of high power LEDs. This system used one piezoelectric actuator and the magnetic repulsive force to activate...
In this study, multiple fans with a piezoelectric actuator (MFPA) system was adopted to transfer the heat inside a pico projector. Different MFPA models with different dimensional combinations of carbon fiber plates and Mylar plates were developed and their thermal performance along with resonant frequency and vibrating amplitude and power consumption were investigated. The result showed that the...
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...
A vibrating fan system is being pursued as a means to create a heat dissipation system. To improve the efficiency of a heat dissipation system, a novel multiple vibrating-fan system that is actuated by both piezoelectric effect and magnetic force has been developed. The performance of the system is affected by the geometry of the fans and the distance between the fans and the heat sink. The surface...
Previous studies show that the performance of a piezoelectric (PZT) fan is strongly affected by length, vibrating frequency, and fan amplitude. This study examines a cooling system, which is composed of a heat sink made of aluminum and a piezoelectric fan. An oscillating airflow can be generated and induced by the fan deformation. The piezoelectric fan between two fins may break the thermal boundary...
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