Thermal performance of dual piezoelectric cool jet for ultra-thin mobile applications

In order to dissipate heat from future low form factor microelectronic systems the use of piezoelectric blowers has recently attracted a great deal of attention. These zero-mass flow devices comprised of two piezoelectric membranes, whose oscillation frequency and amplitude can be electrically tuned, provide a net positive momentum which can be used to actively cool various device components. In order to evaluate the potential use of these cooling devices an open-air bench system has been developed. Experimental performance of a piezoelectric cooling device is compared to natural convection over a heated surface with an attached heat sink. Furthermore the convective heat transfer rate displays a maximum value at a certain threshold which corresponds with previously reported computational results.