The novel modularized multiple fans system with a piezoelectric actuator

Previous studies proposed the multiple fans system with a piezoelectric actuator (MFPA), which combined the piezoelectric effect, magnetic effect and resonance effect to drive the passive fans vibrating simultaneously. In this study, the thermal performance of a modularized MFPA was investigated, in which the housing design was applied. Performance of the MFPA system (η) is defined to describe the improvement of the thermal performance. The results indicate that the geometry of the housing can significantly influence the thermal performance of the modularized MFPA. The results show that can be improved from 30.26 % to 37.55 % when dimensionless width number (Z^*) and dimensionless length number (Y^*) are decreased from 1.5 to 1.25 and from 0.92 to 0.42, separately. Moreover, in the investigation the nozzle angle (θ), the results indicate that η can be further improved to 46.61 % when θ is increased from 0 to 63.43 .